Kyushu University Academic Staff Educational and Research Activities Database
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Hideki Mizunaga Last modified date:2020.06.25

Associate Professor / Earth Engineering
Department of Earth Resources Engineering
Faculty of Engineering


Graduate School
Undergraduate School
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Homepage
https://kyushu-u.pure.elsevier.com/en/persons/hideki-mizunaga
 Reseacher Profiling Tool Kyushu University Pure
http://geo.mine.kyushu-u.ac.jp/
The website of Exploration Gephysics Labo. .
Phone
092-802-3317
Fax
092-802-3317
Academic Degree
Doctor of Engineering
Field of Specialization
Exploration Geophysics
Outline Activities
I investigate the research on new exploration methods using electric and electromagnetic phenomenon to find subsurface mineral resources at deep location. And I investigate the research on new monitoring methods to
visualize dynamic behavior of subsurface fluid flow. I also investigate the research on archaeological exploration and groundwater exploration. I teach the Exploration Geophysics to undergraduate and graduate students as an education activity. I sometimes lecture archaeological exploration for general citizen as social activity.
Research
Research Interests
  • Research on marine exploration for ocean mineral resources
    keyword : marine exploration, resistivity method, electromagnetic method, magnetic method
    2007.03Geophysical exploration of buried objects in the water.
  • Research on exploration method for energey and mineral resources
    keyword : geothermal exploration, hot spring exploration, petroleum exploration, gold deposit exploration, water resources exploration
    1990.06The study on the exploration of energy and mineral resources using electrical resistivity method and electromagnetic method..
  • Research on archaeological exploration using GPR or resistivity survey
    keyword : archaeological exploration, ancient tomb exploration
    1993.04The study on the explaration of anciant tomb and related beried objects using GPR and electroical resistivity method..
  • Research on visualization method to detect dynamic behavior of subsurface fluid flow
    keyword : visualization of oil reservoir, visualization of geothermal reservoir, visualization of groundwater and geothermal water
    2000.04The study on the visualization of near-surface using electrical resistivity method and self-potential method..
Current and Past Project
  • Research on 1-D inversion of TEM data considering IP effect
  • Development of measurement system for evaluating ground improvement using resistivity method
  • Archaeological prospecting at Antokudai ruines at Nakagawa town in Japan
  • Archaeological prospecting at Mikumo-Iwara ruines
  • Research on detection of the location of drill-head for horizontal drilling
  • Research on data analysys of high-precision magnetic survey
  • Research on detection of oil leakage for Marinehose
  • Development of data analysis program for transient electromagnetic method
  • Research on detection of oil leakage for Marinehose
  • Archaeological prospecting at Mikumo-Iwara ruines
  • Research on EOR monitoring using Fluid Flow Electromagnetic (FFEM) method
  • Imaging of injected CO2 into underground using Fluid Flow Tomography
  • The development of portable resistivity equipments for detecting beried pipes, cavities and ancient objects.
Academic Activities
Books
1. The first step: An introductio to Exploration Geophysics.
Reports
1. High-tech archaeological prospecting without excavation.
2. The education and human resource development for earth resources in Kyushu University.
3. H. Mizunaga, K. H. Lee and H. J. Kim, Three-dimensional electromagnetic modeling in the Laplace domain, Ernest Orlando Lawrence National Laboratory Technical Report (LBNL-42677), 1999.01.
Papers
1. Hassan MOHAMED, Hideki MIZUNAGA, Hakim SAIBI, Computation of geophysical magnetic data for a buried 3-D hexahedral prism using the Gauss–Legendre quadrature method, Near Surface Geophysics, doi: 10.1002/nsg.12104, 2020.04, A new method is presented for the 3-D forward modelling of the magnetic effects
(induced magnetization) of a hexahedral (trilinear) prism using the Gauss–Legendre
quadrature method. The 3-D forward modelling provides an improved application
to geological problems. The magnetic effect has been evaluated via the summation
of the effects of the point dipole that fills the volume. The 3-D volume is divided
into smaller prisms using an appropriate number of nodes. The algorithm is tested on
two synthetic examples, and the results are compared against calculated data from
a common program developed at the University of British Columbia–Geophysical
Inversion Facility, with both tests showing positive results. The results of testing the
algorithm against two synthetic slab models are also given. Finally, the program is
applied to a field data set from Aynak-Logar Valley region in Afghanistan. Using this
program, complex 3-D model bodies may be constructed from hexahedral prisms
to facilitate the calculation of their magnetic anomalies and magnetic susceptibility.
Interpretation of the results shows that 3-D constructed models are successful in
recovering the shape and location of the true model..
2. Tumbu Lucus BONIFACE, Hideki MIZUNAGA, Multi-dimensional Resistivity Imaging from Magnetotelluric Data and its Geological Interpretation in Keijo-Mbaka Geothermal Field, South-West Tanzania , Proceedings of International Symposium on Earth Science and Technology 2019, 25-31, 2019.12.
3. Mohammad SHEHATA, Hideki MIZUNAGA, An Enhanced Edge Detection Technique for Potential Field Data; Case Study of Western USA, Proceedings of International Symposium on Earth Science and Technology 2019, 484-487, 2019.12.
4. Hao CHEN, Hideki MIZUNAGA, Toshiaki TANAKA, The research on the application of Hilbert-Huang transformation to time series magnetotelluric data, Proceedings of International Symposium on Earth Science and Technology 2019, 332-335, 2019.12.
5. Yusuke KIYOMOTO, Hideki MIZUNAGA, Toshiaki TANAKA, Development of Magnetotelluric 1-D Sparse Inversion, Proceedings of International Symposium on Earth Science and Technology 2019, 328-331, 2019.12.
6. Tamer FARAG, Nehal SOLIMAN, Atef El SHAYAT, Hideki MIZUNAGA, Landsat 8 and Airborne Geophysical Data Interpretations to Investigate the Radioactivity Hazards at El Gilf El Biber Area, South Western Desert, Egypt, Proceedings of International Symposium on Earth Science and Technology 2019, 458-461, 2019.12.
7. Soichiro HASHIMOTO, Toshiaki TANAKA, Hideki MIZUNAGA, Resistivity measurement technique using capacitor electrodes, Proceedings of International Symposium on Earth Science and Technology 2019, 488-491, 2019.12.
8. Mohammad Shehata, Hideki Mizunaga, Geospatial analysis of surface hydrological parameters for Kyushu Island, Japan, Natural Hazards, 10.1007/s11069-018-3528-0, 96, 1, 33-52, 2019.03, Defining the surface hydrological parameters represents a crucial factor for the sustainable development purposes. In areas with heavy precipitation and rugged topography, these parameters control the occurrence of some natural hazards, from which the flash flood gets the most attention. Traditional methods for the assessment of the surface hydrological parameters are costly, time-consuming and provide information for limited geographic extent. On the other hand, remotely sensed data provide a cost-effective, rapid and wide aerial coverage with adequate accuracy. Geospatial analysis of these remotely sensed data provides a suitable and effective method for the reconnaissance determination of the surface hydrological parameters. In this work, digital elevation models, Landsat 8 satellite images as well as digital maps of soil and land use for Kyushu Island were acquired and analyzed using geographic information system. Surface hydrological parameters were determined in terms of watershed boundaries, soil moisture, initial abstraction as well as flash flood potentiality. Results of this research show a great correlation with historical flash flood events that occurred in the island. The northern parts of the island are subjected to the threat of flash floods. A follow-up is recommended in some areas on the island. As a conclusion, the geospatial analysis performs an accurate reconnaissance method for hydrological analysis at regional scale, which in turn guides the detailed field observation saving time and cost..
9. Jean d’Amour Uwiduhaye, Hideki Mizunaga, Hakim Saibi, A case history
3-D gravity modeling using hexahedral element in Kinigi geothermal field, Rwanda, Arabian Journal of Geosciences, 10.1007/s12517-019-4249-8, 12, 3, 2019.02, It is important for geothermal exploration to know regional subsurface structures. The gravity survey is often used to narrow down the promising area at the early stage of geothermal exploration. The gravity survey was carried out to estimate subsurface density structure in the Kinigi geothermal field, Rwanda, in September 2015. In order to interpret the gravity anomaly distribution, 3-D gravity modeling was done by using the new program based on Gauss-Legendre integration using hexahedral elements. As the result, the computed gravity anomalies showed high gravity anomalies in northwest, the northeast, and east-southeast of the studied field and low anomalies in the southwest side of the studied field as Bouguer anomalies. The area was characterized by normal contacts with main boundary trending NW-SE direction. This boundary was estimated as main fault in Kinigi geothermal field, Rwanda. The detected fault could be a better place for installing geothermal wells for future geothermal development in the region..
10. Mohammad SHEHATA, Hideki MIZUNAGA, Directionality and Mimensionality Analysis of USArray Magnetotelluric Data from Weatern USA, Proceedings of International Symposium on Earth Science and Technology 2018, 38-41, 2018.11.
11. Tumbu Lucus BONIFACE, Hideki MIZUNAGA, Three-dimensional Inversion of MT Data to Geothermal Systems in Kisaki Geothermal Field, Eastern Tanzania, Proceedings of International Symposium on Earth Science and Technology 2018, 487-493, 2018.11.
12. Yosuke KIYOMOTO, Hideki MIZUNAGA, Toshiaki TANAKA, Archaeological Survey for Genko Borui Using Ground Penetrating Radar, Proceedings of International Symposium on Earth Science and Technology 2018, 558-561, 2018.11.
13. Gosuke HOSHINO, Hideki MIZUNAGA, Toshiaki TANAKA, Development of a Simulator for 3-D Long-offset TEM Method, Proceedings of International Symposium on Earth Science and Technology 2018, 562-565, 2018.11.
14. Hideaki EJIMA, Hideki MIZUNAGA, Toshiaki TANAKA, Detection and Classification of Anomalies in GPR B-scan Data, Proceedings of International Symposium on Earth Science and Technology 2018, 566-568, 2018.11.
15. Shokai IWAMOTO, Hideki MIZUNAGA, Toshiaki TANAKA, GPR Survey at Kuratsukasa Erea in Dazaifu Historical Site, Fukuoka Prefecture, Japan, Proceedings of International Symposium on Earth Science and Technology 2018, 569-571, 2018.11.
16. Kazuki YAMADA, Hideki MIZUNAGA, Toshiaki TANAKA, Spectrum Analysis of Gamma Ray Data to Extract Spectrum Peaks, Proceedings of International Symposium on Earth Science and Technology 2018, 572-574, 2018.11.
17. Yusuke EGUSA, Hideki MIZUNAGA, Toshiaki TANAKA, 3-D Simulation of Square Array Resistivity Method Considering the Effects of Mixture of Soil-Cement, Proceedings of International Symposium on Earth Science and Technology 2018, 575-578, 2018.11.
18. Hassan Mohamed, Hakim Saibi, Mohand Bersi, Sami Abdelnabi, Baher Geith, Hamdy Ismaeil, Thomas Tindell, Hideki Mizunaga, 3-D magnetic inversion and satellite imagery for the Um Salatit gold occurrence, Central Eastern Desert, Egypt, Arabian Journal of Geosciences, 10.1007/s12517-018-4020-6, 11, 21, 2018.11, The Um Salatit is a gold occurrence situated in the Central Eastern Desert of Egypt. The studied area is characterized by an intensive imbrication zone of serpentinites and metavolcanic rocks. The integrated use of aeromagnetic and spectral reflectance remote sensing data has proved effective for mapping geology related to ore deposits. Spectral reflectance maps have been produced to discriminate various rocks, such as serpentinites, gabbros, and metavolcanic rocks. 3-D inversion of aeromagnetic data acquired over the Um Salatit study area produced a 3-D magnetic susceptibility model showing magnetic bodies surrounded by less magnetic host rock. The magnetic features are elongated ENE-WSW parallel to the major thrust fault and mapped the Um Salatit serpentinized rocks. Remote sensing data allow investigating surficial geological features and mapping the mineralized areas. Remote results, in conjunction with 3-D inversion of aeromagnetic data, demonstrate that gold occurrence in the study area was effectively restricted to the highly magnetic zone interpreted as host rocks..
19. Uwiduhaya Jean d'Amour, Hakim Saibi, Hideki Mizunaga, Edge detection and 3-D gravity inversion at Kinigi geothermal field, Rwanda, Proceedings of 7th African Rift Geothermal Conference at Kigali, Rwanda, CD-ROM, 2018.10.
20. Cherkose Biruk Abera, Hideki Mizunaga, F. Samrock, Imaging Resistivity Structures of High-Enthalpy Geothermal Systems Using Magnetotelluric Method: A case study of Aluto-Langano geothermal field in Ethiopia, Proceedings of 7th African Rift Geothermal Conference at Kigali, Rwanda, CD-ROM, 2018.10.
21. Jean d.Amour Uwiduhaye, Hideki Mizunaga, Hakim Saibi, Geophysical investigation using gravity data in Kinigi geothermal field, northwest Rwanda, Journal of African Earth Sciences, 10.1016/j.jafrearsci.2017.12.016, 139, 184-192, 2018.03, A land gravity survey was carried out in the Kinigi geothermal field, Northwest Rwanda using 184 gravity stations during August and September, 2015. The aim of the gravity survey was to understand the subsurface structure and its relation to the observed surface manifestations in the study area. The complete Bouguer Gravity anomaly was produced with a reduction density of 2.4 g/cm3. Bouguer anomalies ranging from −52 to −35 mGals were observed in the study area with relatively high anomalies in the east and northwest zones while low anomalies are observed in the southwest side of the studied area. A decrease of 17 mGals is observed in the southwestern part of the study area and caused by the low-density of the Tertiary rocks. Horizontal gradient, tilt angle and analytical signal methods were applied to the observed gravity data and showed that Mubona, Mpenge and Cyabararika surface springs are structurally controlled while Rubindi spring is not. The integrated results of gravity gradient interpretation methods delineated a dominant geological structure trending in the NW-SE, which is in agreement with the regional geological trend. The results of this gravity study will help aid future geothermal exploration and development in the Kinigi geothermal field..
22. Biruk Abera Cherkose, Hideki Mizunaga, Resistivity imaging of Aluto-Langano geothermal field using 3-D magnetotelluric inversion, Journal of African Earth Sciences, 10.1016/j.jafrearsci.2017.12.017, 139, 307-318, 2018.03, Magnetotelluric (MT) method is a widely used geophysical method in geothermal exploration. It is used to image subsurface resistivity structures from shallow depths up to several kilometers of depth. Resistivity imaging using MT method in high-enthalpy geothermal systems is an effective tool to identify conductive clay layers that cover the geothermal systems and to detect a potential reservoir. A resistivity model is vital for deciding the location of pilot and production sites at the early stages of a geothermal project. In this study, a 3-D resistivity model of Aluto-Langano geothermal field was constructed to map structures related to a geothermal resource. The inversion program, ModEM was used to recover the 3-D resistivity model of the study area. The 3-D inversion result revealed the three main resistivity structures: a high-resistivity surface layer related to unaltered volcanic rocks at shallow depth, underlain by a conductive zone associated with the presence of conductive clay minerals, predominantly smectite. Beneath the conductive layer, the resistivity increases gradually to higher values related to the formation of high-temperature alteration minerals such as chlorite and epidote. The resistivity model recovered from 3-D inversion in Aluto-Langano corresponds very well to the conceptual model for high-enthalpy volcanic geothermal systems. The conductive clay cap is overlying the resistive propylitic upflow zone as confirmed by the geothermal wells in the area..
23. Maryadi Maryadi, Hideki Mizunaga, Estimation of Static Temerature Distribution by Means of Audio-Magnetotelluric Data, Proceedings of 43rd Workshop on Geothermal Reservoir Engineering, Stanford University, CD-ROM, 2018.02.
24. Mohammad Shehata, Hideki Mizunaga, Flash Flood Risk Assessment for Kyushu Island, Japan, Environmental Earth Sciences, 10.1007/s12665-018-7250-8, 77, 3, 2018.02, Using advanced geospatial analysis technologies, flash flood risk is assessed for the island of Kyushu, Japan. In this study, the flash flood risk is redefined in terms of the flash flood potential index (FFPI) and the flash flood residential hazard (FFRH). The island experiences rainy weather, especially in the summer (June–August), when catastrophic flash flood events have historically occurred. Studies of the surface hydrological properties of the island are very rare and localized; hence, geospatial techniques are most appropriate for the assessment process. The Soil Conservation Service rainfall-runoff model was used to estimate hydrological responses on the island. Four factors were included in the flash flood assessment. A multi-criteria analysis was carried out to map the FFPI and FFRH from the evaluation factors. The results show that the highest flash flood risk occurs in the northern parts of the island, where the soil displays relatively low infiltration rates and relatively high curve numbers, despite the comparatively low precipitation rates that occur there. The results indicate that soil hydrological properties are the main driving forces of flash floods, especially in regions with low precipitation rates. The results of this research are consistent with previous in situ measurements of runoff made at several sites on the island. The results also show a strong geographic correlation with historical flash flood events on the island. This research validates the use of geospatial analysis for large geographic regions where in situ measurements cannot be taken due to time or cost constraints. The results of this study provide decision makers with the information needed to select a management strategy to address possible future flash flood events that considers safety and water harvesting..
25. Ho Trong Long, Hideki Mizunaga, Keisuke Ushijima, Borehole-to-surface electrical data interpretation at Takigami geothermal field in Kyushu, Japan using neural network, Society of Exploration Geophysicists International Exposition and 76tth Annual Meeting 2006, SEG 2006 Society of Exploration Geophysicists - SEG International Exposition and 76tth Annual Meeting 2006, SEG 2006, 1318-1322, 2018.01, This paper deals with the application of neural network technique for the three-dimension interpretation of mise-à-la-masse data from the Takigami geothermal field in Kyushu, which is one of the most active geothermal area in Japan. To understand the structure of the geothermal field, a 4-layers neural network had been developed. The training algorithm for the network is back-propagation with five paradigms, e.g. on-line back-propagation, batch back-propagation, delta-bar-delta, resilient propagation (RPROP) and quick propagation, were applied to find out the most efficient one. The network was trained with 3-D mise-à-la-masse simulation data set, including 864 cases of a single anomalous resistivity block of 10 Ohm.m moving in the model mesh with background resistivity of 100 Ohm.m. To generate the training data set, a high accuracy algorithm for 3-D numerical simulation, based on finite difference method and the algorithm of the singularity removal, was used. The trained network was tested by a synthetic data and then applied for the real field data set of the study area. The obtained results are remarkably correlated with the other available data from the field such as previous geoelectrical data, formation temperatures, lost circulation zones, hence, promising zones for production or re-injection can be indicated quickly at site of Takigami geothermal field..
26. Mohammad SHEHATA, Hideki MIZUNAGA, Deliniation of the Magnetotelluric Triple Junction Structure Based on Potrential Field Data Interpretation, Proceedings of International Symposium on Earth Science and Technology 2017, 54-59, 2017.12.
27. Maryadi MARYADI, Hideki MIZUNAGA, Analysis of Audio-frequency Magnetotelluric Data for THree-dimensional Deep Temperature Reconstruction, Proceedings of International Symposium on Earth Science and Technology 2017, 68-71, 2017.12.
28. CHERKOSE Biruk Abera, Hideki MIZUNAGA, 3-D Magnetotelluric Inversion to Map Geothermal Structures in Aluto-Langano Geothermal Field, Ethiopia, Proceedings of International Symposium on Earth Science and Technology 2017, 483-486, 2017.12.
29. Yosef KEBEDE, Hideki MIZUNAGA, Dimensionalitu Analysis of Magnetotelluric Data from Tendaho-Alalobeda Geothermal Field, Northeast Ethiopia, Proceedings of International Symposium on Earth Science and Technology 2017, 518-523, 2017.12.
30. Albertus ARIEL, Hideki MIZUNAGA, A New Technique for Noise Reduction of Megnetotelluric Data by Using Cepstrum Analysis, Proceedings of International Symposium on Earth Science and Technology 2017, 556-559, 2017.12.
31. Shafiqullah WAHAB, Hideki MIZUNAGA, Applications of 2-D Resistivity Inversion, Case Studies: Groundwater and Mineral Exploration, Proceedings of International Symposium on Earth Science and Technology 2017, 560-565, 2017.12.
32. Daniel GALLAGHER, Hideki MIZUNAGA, Archaeological Prospection at Dazaifu's Kuratsukasa Area by FDEM, Proceedings of International Symposium on Earth Science and Technology 2017, 566-570, 2017.12.
33. Shunichi OKAMOTO, Toshiaki TANAKA, Hideki MIZUNAGA, Development of a Measurement Instrument Controlled by PSoC5LP for Fluid Flow Electromagnetic Method, Proceedings of International Symposium on Earth Science and Technology 2017, 571-573, 2017.12.
34. Gosuke HOSHINO, Hideki MIZUNAGA, Toshiaki TANAKA, Development of a Ray Tracing Program for Seismic Refraction Method, Proceedings of International Symposium on Earth Science and Technology 2017, 574-576, 2017.12.
35. Ryosuke NAGAWA, Hideki MIZUNAGA, Toshiaki TANAKA, Development of an Inversion Program of Marine TEM Using PSO, Proceedings of International Symposium on Earth Science and Technology 2017, 577-579, 2017.12.
36. Syokai IWAMOTO, Hideki MIZUNAGA, Toshiaki TANAKA, GPR Survey at Kuratsukasa District in Dazaifu Historical Site, Fukuoka Prefecture, Japan, Proceedings of International Symposium on Earth Science and Technology 2017, 580-582, 2017.12.
37. Kazuki YAMADA, Hideki MIZUNAGA, Radioactive Exploration in Ito Campus Using Gamma Ray Spectrometer, Proceedings of International Symposium on Earth Science and Technology 2017, 583-585, 2017.12.
38. Hideaki EJIMA, Hideki MIZUNAGA, Toshiaki TANAKA, Recognition of Buried Objects of GPR Using CNN, Proceedings of International Symposium on Earth Science and Technology 2017, 586-588, 2017.12.
39. Yusuke EGUSA, Hideki MIZUNAGA, Toshiaki TANAKA, Simulation of Square Array Resistivity Method to Detect Subsurface Layer Boundaries, Proceedings of International Symposium on Earth Science and Technology 2017, 589-591, 2017.12.
40. Hassan Mohamed, Hideki Mizunaga, Nasser Mohamed Abou Ashour, Refaat Ahmed Elterb, Ibrahim Mostafa Elalfy, Ayman Shebel Elsayed, Radiogenic heat production in Rudeis Formation, Lower Miocene, Belayim marine oil field, Gulf of Suez, Egypt, Exploration Geophysics, 10.1071/EG15021, 48, 4, 512-522, 2017.12, This study describes radiogenic heat production (RHP) estimated from two sets of well logging data recorded in Rudeis Formation, Belayim marine oil field. Subsurface total count gamma-ray (GR) data were recorded in nine wells, seven of which possessed spectrometric data (eU, eTh, and K). The data show that RHP estimated from GR logs (ABR) varies from 0.13 to 1.73μW/m3, with an average of 0.7μW/m3 and a standard deviation of 0.26μW/m3. In addition, 72.9% of RHP values fall within the range of 0.6-1.0μW/m3. RHP estimated from the concentrations of radioactive elements (AR) vary from 0.13 to 2.1μW/m3, with an average 0.71μW/m3 and a standard deviation of 0.38μW/m3. 50% of these RHP values fall within the range of 0.6-1.0μW/m3. Cross-correlation of ABR and AR calculations yielded a moderate fit of 0.75. The three-dimensional (3D)-slicing of the reservoir shows that the northern and north-western parts of the study area have higher RHP compared to other parts. The estimated RHP can produce enough heat which has an effect on the hydrocarbon potential in Rudeis Formation..
41. Three-dimensional Visualizasion of the Inner Structure of Iwabaru-Futagozuka Kofun Using Resistivity Method.
42. 2.5-D forward modeling and inversion of time domain IP method.
43. Jean d'Amour UWIDUHAYE, Hideki Mizunaga, Hakim SAIBI, Gravity survey in Kinigi geothermal field, Rwanda, Proceedings of International Symposium on Earth Science and Technology 2016, 118-123, 2016.12.
44. Akitaka NAKAMURA, Hideki Mizunaga, 1D modeling of TEM method in consideration of IP effect, Proceedings of International Symposium on Earth Science and Technology 2016, 473-475, 2016.12.
45. Daniel GALLAGHER, Hideki Mizunaga, 1-D forward modeling of airborne transient electromagnetic method, Proceedings of International Symposium on Earth Science and Technology 2016, 476-479, 2016.12.
46. Keisuke IKEDA, Hideki Mizunaga, Toshiaki Tanaka, GPR survey at Onigaura tunnel tombs and 2-D simulation, Proceedings of International Symposium on Earth Science and Technology 2016, 486-488, 2016.12.
47. Shogo HAMADA, Hideki Mizunaga, Toshiaki Tanaka, A study on identification of signal and noise in fluid flow electromagnetic method, Proceedings of International Symposium on Earth Science and Technology 2016, 489-491, 2016.12.
48. Maryadi MARYADI, Hideki Mizunaga, Correlation analysis between audio-magnetotelluric and borehole thermograms data for developing electromagnetic geothermometry, Proceedings of International Symposium on Earth Science and Technology 2016, 492-497, 2016.12.
49. Biruk Abera CHERKOSE, Hideki Mizunaga, Megnetotelluric investigation in Aluto-Langano geothermal field, Ethiopia, Proceedings of International Symposium on Earth Science and Technology 2016, 510-514, 2016.12.
50. Hassan MOHAMED, Hideki Mizunaga, Nasser Mohamed Abou Ashour, Refaat Ahmed Elterb, Ibrahim Mostafa Elalfy, Ayman Shebel Elsayed, Radiometric heat production in Rudesis Formation, Lower Miocene, Belayim marine oil field, Gulf od Suez, Egypt, Exploration Geophysics, (Published online September 2016), 2016.09.
51. Satoru Yamaguchi, Hideki Mizunaga, Taishiro Katsu, Satoshi Nakamuta, Yasuki Kono, Preliminary Design of an Underwater Glider for Ocean Floor Resources Exploration, Proceedings of the Twenty-sixth (2016) International Ocean and Polar Engineering Conference, Rodes, Greece, 590-594, 2016.06.
52. Three-dimensional modeling and correlation tomography of gravity gradiometry.
53. Satoru Yamaguchi, Hideki Mizunaga, Taishiro Katsu, Satoshi Nakamuta, Yasuki Kono, Preliminary design of an underwater glider for ocean floor resources exploration, 26th Annual International Ocean and Polar Engineering Conference, ISOPE 2016 Proceedings of the 26th International Ocean and Polar Engineering Conference, ISOPE 2016, 2016-January, 590-594, 2016.01, In this paper, the authors propose a novel exploration system for ocean floor resources using an autonomous underwater glider and OBEM (Ocean bottom electromagnetometer). Studies on the gliding performance and the hydrodynamic characteristics of several kinds of body shape were carried out for the preliminary design of the system. Gliding ratios in a steady flow were estimated based on CFD calculation for different main wing shapes. The effects of the size of the body and the camber of the main wing were examined as well. It was confirmed that designed vehicle had efficient gliding performance to achieve the autonomous OBEM measurement..
54. Hassan MOHAMED, Hideki Mizunaga, Hakim SAIBI, Ali ABDELAZIZ, Three-dimensional Forward Modeling of Geomagnetic Data Using Hexahedral Element with Application to Zeit Basin Area, Gulf of Suez, Egypt, Proceedings of International Symposium on Earth Science and Technology 2015, 155-160, 2015.12.
55. Kyosuke TANNO, Hideki Mizunaga, 3-D Inversion of Gravity Method Using Quantum Annealing, Proceedings of International Symposium on Earth Science and Technology 2015, 306-308, 2015.12.
56. Satoshi TANIMURA, Hideki MIZUNAGA, Development of One-dimensional Inversion Program of Marine Controlled Source Electromagnetic (MCSEM) Method with Particle Swarm Optimization, Proceedings of International Symposium on Earth Science and Technology 2015, 309-312, 2015.12.
57. Keisuke IKEDA, Hideki MIZUNAGA, GPR Survey at Funabaru Ruins in Koga City, Fukuoka Prefecture, Japan, Proceedings of International Symposium on Earth Science and Technology 2015, 313-316, 2015.12.
58. Shogo HAMADA, Hideki MIZUNAGA, Toshiaki TANAKA, Research about Measurement of Marine MT Probe's Posture, Proceedings of International Symposium on Earth Science and Technology 2015, 317-319, 2015.12.
59. Jean d'Amour UWIDUHAYE, Hideki MIZUNAGA, 3-D Simulation of Gravity Method Using Gauss-Legendre Integration, Special Issue of the Joint Program of Sustainable Resources Engineering, JPSRE, International Symposium on Earth Science and Technology 2015, 25-28, 2015.12.
60. Akitaka NAKAMURA, Hideki MIZUNAGA, Saline Contamination Research in Motooka Using TEM Method, Special Issue of the Joint Program of Sustainable Resources Engineering, JPSRE, International Symposium on Earth Science and Technology 2015, 33-35, 2015.12.
61. High-precision linear filter using continuous Euler transformation.
62. Shota Kukita, Hideki Mizunaga, Three-dimensional Forward Modeling of Airborne TEM Method, Proceedings of International Symposium on Earth Science and Technology 2014, 272-274, 2014.12.
63. Kenta KUMA, Hideki MIZUNAGA, Toshiaki TANAKA, Three-dimensional Modeling and Inversion of Fluid Flow Electromagnetic Method, Proceedings of International Symposium on Earth Science and Technology 2014, 275-278, 2014.12.
64. Satoshi TANIMURA, Hideki MIZUNAGA, Yutaka SASAKI, One-dimensional Forward Modeling of Marine Controlled Source Electromagnetic (MCSEM) Method, Expanded Abstracts by the Students of the School on the Move in AJ-BCEP, International Symposium on Earth Science and Technology 2014, 358-361, 2014.12.
65. Kyosuke TANNO, Hideki MIZUNAGA, Three-dimensional Forward Modeling of the Gravity Exploration Using the Hexahedral Element, Expanded Abstracts by the Students of the School on the Move in AJ-BCEP, International Symposium on Earth Science and Technology 2014, 362-365, 2014.12.
66. Shota Kukita, Hideki Mizunaga, Toshiaki TANAKA, 3-D Forward Modeling of Airborne TEM Method for Wide Geothermal Area, Proceedings of Grand Renewable Energy 2014 International Conference, 2014.07.
67. Kenta Kuma, Hideki Mizunaga, Toshiaki TANAKA, Three-dimensional Numerical Simulation of Fluid Flow Electromagnetic Method for Geothermal Fluid, Proceedings of Grand Renewable Energy 2014 International Conference, 2014.07.
68. Wei Deng, Hideki Mizunaga, Yutaka Sasaki, Stepwise 3-D Resistivity Inversion and Sensitibity Factor Analysis, Proceedings of the International Symposium on Earth Science and Technology 2013, 321-327, 2013.12.
69. Tateyuki Negi, Hideki Mizunaga, Yuji Mitsuhata, Quality improvement in the magnetotelluric spectrum using multiple far remore references, Proceedings of the 11th SEGJ International Symposium, USB (only digital data) , 2013.11.
70. Shota Kukita, Hideki Mizunaga, UXO detection using small loop TEM method, Proceedings of the 11th SEGJ International Symposium, USB (only digital data) , 2013.11.
71. Tateyuki Negi, Hideki Mizunaga, Koichi Asamori, Koji Umeda, Three-dimensional magnetotelluric inversion using a heterogeneous smoothness-constrained least-squares method, Exploration Geophysics, 10.1071/EG13026, 44, 3, 145-155, 2013.09, This paper presents a fast algorithm for electromagnetic data inversion to three-dimensional (3D) resistivity models. The algorithm is distinctive for the level of accuracy it attains while bypassing the sensitivity matrix update. A common sensitivity matrix for homogeneous half-space is used in all iterations. Instead of updating the sensitivity matrix, the smoothness filter coefficients at each model element are updated, based on the spatial variations in resistivity in the model derived from the latest iteration. This substitution is expected not only to reduce the computation time required for large-scale inversions, such as those for 3D surveys, but also to allow the resolution of sharp boundaries in resistivity structures. Our algorithm was applied to 3D magnetotelluric inversion in order to confirm its effectiveness. Using synthetic examples under several conditions, we demonstrated that the method can reduce the number of forward calculations required to reduce data misfits to noise level, and that the method is robust for constructing target models even with sharp boundaries without generating fatally false resistivity structures or boundaries under noisy conditions..
72. Tateyuki Negi, Hideki Mizunaga, Toshihiro Uchida, A Technique for Calculating Magnetotelluric Impedance Based on the Presence of Noise, Journal of Novel Carbon Resource Sciences, Vol.6, 36-40, 2012.09.
73. Tateyuki Negi, Hideki Mizunaga, Koichi Asamori and Koji Umeda, Three dimensional magnetotelluric imaging of the source area of 2000 Western Tottori earthquake using heterogeneous smoothness-constraint least-squares method, Proceedings of International Symposium on Earth Science and Technology 2011, 341-344, 2011.12.
74. Nureddin M. Saadi, Koichiro Watanabe, Hideki Mizunaga, Evaluation of image processing methods for geological interpretation in the different environments in Libya, Arabian Journal of Geosciences, 10.1007/s12517-010-0241-z, 4, 3-4, 635-643, 2011.01, This study evaluates the use of image processing techniques and methodologies of digital integration of multi-disciplinary geoscientific data to reduce the ambiguity in geological interpretations in different geological environments in Libya. To realize this objective, three areas were selected for this study; Eljufra, an arid environment; the mountainous environment Tarhunah; and the Jifara Plain, a coastal plain environment. Two types of remote sensing data were used in this study: Landsat Enhanced Thematic Mapper Plus (ETM+) and European Remote Sensing Satellite. The digital elevation model extracted from Shuttle Radar Topography Mission and digital topographic maps scale 1:50,000 were used for remote sensing interpretation. GIS and remote sensingbased methods were used to process and integrate all raster and vector layers data. This study offered dramatic benefits for geological interpretations and provided new insights into the efficiency of image processing methods in different geological environments..
75. Analysis of Apparent Resistivity Profile Using Deconvolution Filter.
76. Archaeological Prospecting at Imajuku-Otsuka Tumulus by Uing Seismic Tomography.
77. Three-dimensional Imaging of GPR Data Using F-K Migration.
78. Archaeological Prospecting of Keyhole Shaped Mounded Tombs at Ito Campus of Kyushu University.
79. Hideki Mizunaga, Toshiaki Tanaka, K. Ushijima, N. Ikeda, Fluid-flow monitoring by a 4-D geoelectrical techniques, 19th Symposium on the Application of Geophysics to Engineering and Environmental Problems: Geophysical Applications for Environmental and Engineering Hazzards - Advances and Constraints, SAGEEP 2006 19th Symposium on the Application of Geophysics to Engineering and Environmental Problems, SAGEEP 2006 Geophysical Applications for Environmental and Engineering Hazzards - Advances and Constraints, 2, 1494-1504, 2006.12, An advanced geoelectrical technique for imaging potential fractures has been developed by Engineering Geophysics Laboratory in Kyushu University. The method, Fluid Flow Tomography (FFT), has been applied to monitor fluid flow behaviors in a reservoir during water injection and steam production operations in geothermal areas. Distribution and extension of major fractures can be evaluated by 3-D inversion of induced self potential (SP) anomalies with a function of time and resistivity structures can be determined by 3-D inversion of the charged potential data in a surveyed area. It is concluded that fluid flow behaviors in a reservoir could be continuously traced and visualized as a function of time by the FFT method..
80. Keisuke Ushijima, Hideki Mizunaga, Toshiaki Tanaka, Mine and UXO exploration by electrical resistivity measurements, 19th Symposium on the Application of Geophysics to Engineering and Environmental Problems: Geophysical Applications for Environmental and Engineering Hazzards - Advances and Constraints, SAGEEP 2006 19th Symposium on the Application of Geophysics to Engineering and Environmental Problems, SAGEEP 2006 Geophysical Applications for Environmental and Engineering Hazzards - Advances and Constraints, 1615-1623, 2006.12, Mine clearing is an urgent matter to be tackled internationally not only from the humanitarian point of view but also from the viewpoint of reconstruction and economic growth in the area where a cessation of armed conflicts was achieved. Operations are already underway to clear landmines, but currently they rely heavily on human works due to a lack of safer and efficient demining techniques. Various geophysical exploration techniques have been applied to the problem of detecting and mapping underground mines and UXO with practical success. The most productive techniques are magnetic, electromagnetic and Ground Penetrating Radar methods for which the mine target exhibits the greatest physical contrast with the host geological formation. Developments of more sensitive geophysical equipments for detecting mines is required to meet the geophysical conditions of lower contrast with the environment and at the scale of the target. Starting from May 2004, a channel of communication between the Egyptian embassy in Tokyo and the Kyushu University Mine Action Group (QMAG) team on the topics of landmines in Egypt has been established on how to apply geophysical techniques newly developed geophysical techniques in Japan to solve the problem of landmines in Egypt. We arranged a campaign for landmines detection technology in Egypt, conducted by research teams of QMAG of Kyushu University. During the campaign three geophysical techniques, DC resistivity, magnetic and ground penetration radar were tested and evaluated..
81. Hideki Mizunaga, Toshiaki Tanaka, Keisuke Ushijima, 3D imaging of archaeological tomb by electrical resistivity techniques, 19th Symposium on the Application of Geophysics to Engineering and Environmental Problems: Geophysical Applications for Environmental and Engineering Hazzards - Advances and Constraints, SAGEEP 2006 19th Symposium on the Application of Geophysics to Engineering and Environmental Problems, SAGEEP 2006: Geophysical Applications for Environmental and Engineering Hazzards - Advances and Constraints, 2, 1374-1377, 2006.12, Several geophysical exploration methods have been applied to the problem of detecting and mapping underground archaeological remains with practical success. The most productive techniques are those for which the archaeological target exhibits the great physical contrast with the surrounding formation. Most widely used in archaeological prospection include Magnetic, Electromagnetic, Ground Penetrating Radar and Electrical Resistivity methods applied at the shallow surface. However, these conventional geophysical measurements for an archaeological prospection has been tried with relatively limited success. Therefore, we have developed an automatic imaging system named as Handy-ARM (Archaeological Resistivity Meter) for an archaeologist based on electrical resistivity techniques..
82. Supriyanto Suparno, Hideki Mizunaga, Keisuke Ushijima, 3-D MAM inversion in Sibayak geothermal field, Indonesia, Memoirs of the Faculty of Engineering, Kyushu University, 66, 2, 99-113, 2006.08, Sibayak geothermal field is located about 65 km to the southwest of Medan in the North Sumatra Province, Indonesia. Starting from 1998, a small-scale geothermal power plant (2 MWe) has been installed in this area. Since electricity demand increases in the North Sumatra Province, Pertamina Geothermal Energy plans to increase the capacity to 20 MWe. Accordingly, detailed knowledge of the reservoir structure and its extension must be determined for a new production target. The mise-a-la-masse (MAM) surveys were carried out in this field using the exploration well SBY-1 and the production well SBY-4 to delineate a new production target for further field development. A conventional one-dimensional MAM data processing has been done to obtain lateral variation of subsurface resistivity. However, the result is not satisfied to image real condition of the geology on the subsurface. Therefore, we carried out an advanced 3-D MAM inversion based on the smoothness-constrained least-squares method using a homogeneous earth as the simplest assumption of the starting model. Interpretation of the 3-D MAM model was done by combining the results with previous geo-electrical data and borehole information to image a promising reservoir zone. The resistivity model obtained from this study is characterized by a very low resistivity cap rock beneath a resistive layer and rather high resistivity layer of the reservoir. The very low resistivity layer is due to clay minerals such as montmorillonite. This interpretation result of the 3-D MAM model indicates that reservoir zones trend to the north-northeast direction of the study area, between Mt. Sibayak and Mt. Pratektekan, and shows a good correlation with the formation temperature and the lost circulation zone. This geophysical information is useful for the task of selecting sites for the promising zone in the Sibayak geothermal field..
83. Ho Trong Long, Hideki Mizunaga, Keisuke Ushijima, Borehole-to-surface electrical data interpretation at Takigami geothermal field in Kyushu, Japan using neural network, SEG Technical Program Expanded Abstracts, 10.1190/1.2369763, 25, 1, 1318-1322, 2006.01, This paper deals with the application of neural network technique for the three-dimension interpretation of mise-à-la-masse data from the Takigami geothermal field in Kyushu, which is one of the most active geothermal area in Japan. To understand the structure of the geothermal field, a 4-layers neural network had been developed. The training algorithm for the network is back-propagation with five paradigms, e.g. on-line back-propagation, batch back-propagation, delta-bar-delta, resilient propagation (RPROP) and quick propagation, were applied to find out the most efficient one. The network was trained with 3-D mise-à-la-masse simulation data set, including 864 cases of a single anomalous resistivity block of 10 Ohm.m moving in the model mesh with background resistivity of 100 Ohm.m. To generate the training data set, a high accuracy algorithm for 3-D numerical simulation, based on finite difference method and the algorithm of the singularity removal, was used. The trained network was tested by a synthetic data and then applied for the real field data set of the study area. The obtained results are remarkably correlated with the other available data from the field such as previous geoelectrical data, formation temperatures, lost circulation zones, hence, promising zones for production or re-injection can be indicated quickly at site of Takigami geothermal field..
84. Supriyanto Suparno, Hideki Mizunaga, Keisuke Ushijima, MAM and MT Exploration in the Sibayak Geothermal Field, Proceedings of 2005 SEG Annual Meeting, CD-ROM, 2005.11.
85. Hideki Hatanaka, Tetsuo Aono, Hideki Mizunaga, Keisuke Ushijima, Three-Dimensional Modeling and Inversion of the Mise-a-la-masse Data Using a Steel-Casing Borehole, Proceedings of World Geothermal Congress 2005, CD-ROM, 2005.04.
86. Hideki Mizunaga, Tetsuo Aono, Keisuke Ushijima, Imaging Geothermal Reservoir by a 4-D Geoelectrical Method, Proceedings of World Geothermal Congress 2005, CD-ROM, 2005.04.
87. Koichi Tagomori, Enjang Mustopa, Hisashi Jotaki, Hideki Mizunaga, Keisuke Ushijima, Imaging geothermal fractures by CSAMT method at Takigami area in Japan, Proceedings of Thirtieth Workshop on Gepthermal Reservoir Engineering, Stanford University, SGP-TR-176, 2005.01.
88. Reservoir Monitoring of the Onuma Geothermal Field Using Fluid Flow Tomography.
89. 3D imaging of subsurface using GPR data.
90. Tree-dimensional inversion of the mise-a-la-masse data using a directional borehole.
91. Enjang Jaenal Mustopa, Hisashi Jotaki, Hideki Mizunaga, Keisuke Ushijima, Magnetotelluric exploration of geothermal resources at Takigami area in Japan, Transactions of Geothermal Resource Council, 27, 245-248, 2003.01, A magnetotelluric (MT) survey has been carried out in Takigami geothermal area to determine resistivity structures and the locations of electrical discontinuities that may reflect a possible fault or fracture correlating with promising geothermal reservoir. The MT measurements have been conducted with irregular grid stations covering the Takigami area. The two-dimensional (2-D) inversion results of the MT data show that the resistivity structures in Takigami area are composed mainly of three layers, that is, high resistivity in the first layer overlying low resistivity in the second layer and resistive electrical basement in the third layer. The results are also in a good agreement with electrical resistivity logs, temperature distribution and lost circulation zone during the course of drilling. It is revealed from the interpretation of MT data that the geothermal reservoir of Takigami field is located at two different depths separated by Noine fault zone, which divides the subsurface of the area into eastern and western parts according to the characteristics of resistivity, permeability, temperature and depth of reservoir. The reservoir in the east of Noine fault zone is shallower than that in the west..
92. G. El-Quady, H. Mizunaga, K. Ushijima, Comparative study of resistivity inversion at hamam faraun area, Egypt, Memoirs of the Graduate School of Engineering, Kyushu University, 60, 3, 117-128, 2000.12, DC resistivity method is commonly used for acquiring subsurface resistivity data in environmental and engineering investigations. However, its interpretation is hampered by a variety of factors of which the non-linear nature of the process and bias effects on the data; mainly due to the noise; are the most problem, which limit the model resolution to a large extent. The ability to invert resistivity data successfully depends on many factors such as the uniqueness of the model as well as the robustness of the inversion algorithm. Hereafter we are investigating this problem using three different 1-Diversion algorithms. The three algorithms have been applied to a numerical model of 4 layers to determine the optimum solution produced by each of them. A random noise of 5, 10 and 20 percents has been added to the model in a forward step to determine the most stable, robustness algorithm. Those algorithms have been applied to the field data set measured at Hamam Faraum hot spring area, Egypt, aiming to make a refinement to the previous 1-D inversion done before for the same data set (E1-Qady et. al, 1998). We could conclude that the algorithm of Meju, (1992), is the most effective one in this study. The resulted 1-D geoelectrical cross section could elucidate the subsurface structure and explain the origin of the hot water in the area..
93. Keisuke USHIJIMA, Hideki MIZUNAGA, Toshiaki TANAKA, Kazuo MIYAMOTO, 3D Imaging Archaeological Tomb by Vertical Electric Soundings, Proceedings of Symposium on the Application of Geophysics to Engineering and Environmental Problems 2005, 856-861, 2000.04.
94. Keisuke Ushijima, Hideki Mizunaga, Toshiaki Tanaka, Reservoir monitoring by a 4-D electrical technique, The Leading Edge, 10.1190/1.1438242, 18, 12, 1422-1424, 1999.12, A multichannel geoelectrical system and software for data acquisition, processing and interpretation was developed. The method, called fluid-flow tomography (FFT), was used for direct imaging of fractures and an extension of geothermal reservoirs, and to monitor an oil reservoir during thermally enhanced oil recovery. The fluid-flow behavior in the subsurface can be monitored and visualized by the technique, providing time-series data of charged potentials and self-potentials, fluid-flow fronts visualizations and quantifications, symmetric anomaly due to anisotropic permeability of the formation, and 3D fractures distribution..
95. Li JISONG, 水永秀樹, 牛島 惠輔, ニューラルネットワークを用いた流電電位法データの解釈, 物理探査, 52, 1, 43-53, 1999.02.
96. Keisuke USHIJIMA, Hideki MIZUNAGA, Toshiaki TANAKA, Kazuo MASUDA, Fluid Flow Monitoring of EOR Process by Electrical Prospecting, SEG Technical Program Expanded Abstructs 1997, 651-654, 1997.11.
97. Li Jisong, Hideki MIZUNAGA, Keisuke USHIJIMA, Interpretation of Mise-a-la-masse Method Data Using Neural Network, International Symposium on Engineering and Environmental Geophysics 1997, 1997.10.
98. Calculation of electric potential due to a buried current source in a layered earth.
99. Hideki Mizunaga, Toshiaki Tanaka, Hideshi Kaieda, Keisuke Ushijima, Fluid flow monitoring system of a geothermal reservoir by electrical prospecting, Memoirs of the Kyushu University, Faculty of Engineering, 55, 4, 505-512, 1995.12, An advanced geophysical technique for reservoir monitoring by electrical prospecting has been developed by the joint research of Kyushu University and CRIEPI work in related to fracture evaluation at the Hot Dry Rock Geothermal Power Project in the Ogachi area. The Fluid Flow Tomography survey method utilizes a casing pipe itself as a charged current electrode similar to the mise-a-la-masse method. The method has been applied to monitor fluid-flow behaviors during massive hydraulic fracturing operations and fluid-circulation experiments from injection to production boreholes. In the automatic recording system controlled by a personal computer charged potentials (mV/A) and spontaneous potentials (mV) can be simultaneously measured as a function of time at multiple stations (120ch) surrounding an operating borehole. Fluid-flow behavior in the subsurface could be visualized as a function of time by using contour maps of residual potentials from SP data and relative changes of apparent resistivity due to dynamic reservoir stimulations..
100. Hideshi KAIEDA, Yasuhiro Fujimitsu, Takeshi YAMAMOTO, Hideki MIZUNAGA, Keisuke USHIJIMA, Shunji SASAKI, AE and Mise-a-la-masse Measurements during a 22-days Water Circulation Test at Ogachi HDR Site, Japan, Proceedings of the World Geothermal Congress, 1995, 2695-2700, 1995.05.
101. Hideki Mizunaga, Toshiaki Tanaka, Hideshi Kaieda and Keisuke Ushijima, Fluid flow monitoring system of a geothermal reservoir by electrical prospecting, Memoirs of the Faculty of Engineering, Kyushu University, Vol.55, No.4, 505-512, 1995.01.
102. Hideshi Kaieda, Toshiaki Tanaka, Hideki Mizunaga, Keisuke Ushijima, Fluid flow monitoring by vertical electric profiling method in Ogachi HDR site, Akita prefecture, Japan, 1992 Annual Meeting of the Geothermal Resources Council Transactions - Geothermal Resources Council, 16, 497-499, 1992.12, Hydraulic fracturing experiments for making a man-made reservoir have been conducted on HDR project by CRIEPI since 1986. The Vertical Electric Profiling (VEP, hole-to-surface) method of the geotomography has been applied to monitor fluid-flow behaviors during massive hydraulic fracturing operations. Self potentials (streaming potentials) and charged potentials (apparent resistivities) were continuously observed at multiple stations on the ground surface before and during pumping operations for estimating fluid-flow front and fracture extents. The injected fluid-flow was continuously imaged as a function of time with a personal computer on the Hot Dry Rock site..
103. Keisuke Ushijima, Shigetsugu Furuya, Hideki Mizunaga, Toshiro Motomatsu, Fluid flow monitoring by vertical electric profiling survey in takigami geothermal field, middle Kyushu, Japan, 1992 Annual Meeting of the Geothermal Resources Council Transactions - Geothermal Resources Council, 16, 323-328, 1992.12, The Vertical Electrical Profiling (VEP) surveys were carried out for the direct imaging of fractures in a northern reinjection area using TT-10 reinjection well and in the southern production area using TT-14 and TT-13 production wells in the Takigami geothermal field, Kyushu, Japan. The injection/production fluid-flows were continuously monitored with multiple potential electrodes on the ground surface surrounding the well. The potential data are measured with every 2 sec intervals by the digital recording system controlled by a personal computer on the site. The distribution of fractures estimated from the detected potentials show good agreements with the geometry of major fractures determined by the previous VEP (hole-to-surface) surveys in 1984 and the modern magneto-telluric survey in 1987..
104. K. Ushijima, Hideki Mizunaga, Hideo Mori, A. Hattori, T. Tajima, Fluid flow tomography of reinjection well by the vertical electric profiling method in Kazuno area, Akita prefecture, Japan, 1991 Annual Meeting of the Geothermal Resources Council Transactions - Geothermal Resources Council, 297-299, 1991.12, The Vertical Electric Profiling (VEP) methods were carried out for the exploration of fractures for the reinjection purposes in Kazuno area. The first field survey was conducted in 1985 by using a casing pipe of K-1 well and the drill site of K-5 was determined from the interpreted results. The K-5 reinjection well have met a good lost circulation zone of 135 t/h at the depth of 684 m. The second VEP survey was conducted in 1990 by using a casing pipe of K-5 well before and during the injection operations of the separated hotwater. The injected fluid was continuously monitored with 30 stations surrounding the well by the digital recording system controlled by a personal computer on the site. The distribution of fractures estimated from the detected flow paths show good agreements with the geometry of the major fractures obtained by the borehole imaging data by Schlumberger Wireline Service Inc.,..
105. Three-Dimensional Numerical Modeling for the Mise-a-la-masse Method.
106. Study on Data Processing for the Mise-a-la-masse Survey.
Works, Software and Database
1. Temtool for TEM Analysis.
Presentations
1. Soichiro HASHIMOTO, Toshiaki TANAKA, Hideki MIZUNAGA, Resistivity measurement technique using capacitor electrodes, International Symposium on Earth Science and Technology 2019, 2019.12.
2. Tamer FARAG, Nehal SOLIMAN, Atef El SHAYAT, Hideki MIZUNAGA, Landsat 8 and Airborne Geophysical Data Interpretations to Investigate the Radioactivity Hazards at El Gilf El Biber Area, South Western Desert, Egypt, International Symposium on Earth Science and Technology 2019, 2019.12.
3. Mohammad SHEHATA, Hideki MIZUNAGA, An Enhanced Edge Detection Technique for Potential Field Data; Case Study of Western USA, International Symposium on Earth Science and Technology 2019, 2019.12.
4. Hao CHEN, Hideki MIZUNAGA, Toshiaki TANAKA, The research on the application of Hilbert-Huang transformation to time series magnetotelluric data, International Symposium on Earth Science and Technology 2019, 2019.12.
5. Yusuke KIYOMOTO, Hideki MIZUNAGA, Toshiaki TANAKA, Development of Magnetotelluric 1-D Sparse Inversion, International Symposium on Earth Science and Technology 2019, 2019.12.
6. Tumbu Lucas Boniface, Hideki MIZUNAGA, Multi-dimensional Resistivity Imaging from Magnetotelluric Data and its Geological Interpretation in Keijo-Mbaka Geothermal Field, South-West Tanzania, International Symposium on Earth Science and Technology 2019, 2019.12.
7. Estimation of deep subsurface temperature using electromagnetic geothermometry.
8. #Tamer Farag, Mohammad Shehata,Hideki Mizunaga, The Present Scenario Controoling Groundwater Resources Using Magnetic Data at Wadi El Assuity, Egypt, 物理探査学会 第141回学術講演会, 2019.10.
9. #Mohammad Shehata,Hideki Mizunaga, Three Dimensional Subsurface Resistivity Imaging of the Western USA Retrieved from Magnetotelluric Inversion, 物理探査学会 第141回学術講演会, 2019.10.
10. Magnetotelluric 1-D Sparse Inversion.
11. 1-D Inversion of TEM Data Considering IP Effect.
12. Yusuke EGUSA, Hideki MIZUNAGA, Toshiaki TANAKA, 3-D Simulation of Square Array Resistivity Method Considering the Effects of Mixture of Soil-Cement, International Symposium on Earth Science and Technology 2018, 2018.11.
13. Kazuki YAMADA, Hideki MIZUNAGA, Toshiaki TANAKA, Spectrum Analysis of Gamma Ray Data to Extract Spectrum Peaks, International Symposium on Earth Science and Technology 2018, 2018.11.
14. Shokai IWAMOTO, Hideki MIZUNAGA, Toshiaki TANAKA, GPR Survey at Kuratsukasa Erea in Dazaifu Historical Site, Fukuoka Prefecture, Japan, International Symposium on Earth Science and Technology 2018, 2018.11.
15. Hideaki EJIMA, Hideki MIZUNAGA, Toshiaki TANAKA, Detection and Classification of Anomalies in GPR B-scan Data, International Symposium on Earth Science and Technology 2018, 2018.11.
16. Gosuke HOSHINO, Hideki MIZUNAGA, Toshiaki TANAKA, Development of a Simulator for 3-D Long-offset TEM Method, International Symposium on Earth Science and Technology 2018, 2018.11.
17. Yosuke KIYOMOTO, Hideki MIZUNAGA, Toshiaki TANAKA, Archaeological Survey for Genko Borui Using Ground Penetrating Radar, International Symposium on Earth Science and Technology 2018, 2018.11.
18. Tumbu Lucus BONIFACE, Hideki MIZUNAGA, Three-dimensional Inversion of MT Data to Geothermal Systems in Kisaki Geothermal Field, Eastern Tanzania, International Symposium on Earth Science and Technology 2018, 2018.11.
19. Mohammad SHEHATA, Hideki MIZUNAGA, Directionality and Mimensionality Analysis of USArray Magnetotelluric Data from Weatern USA, International Symposium on Earth Science and Technology 2018, 2018.11.
20. Analysis of Gamma-ray Spectrum Using Sparce Modeling in Radioactive Method.
21. Tumbu LUCAS, Hideki MIZUNAGA, Dimensionality and Directionality Analysis of MT Data to Geothermal Systems in Kiejo-Mbaka Geothermal Field, South-West Tanzania, 物理探査学会 第140回学術講演会, 2019.06.
22. 清元 陽介, 水永 秀樹,田中 俊昭,岩本 鐘海, レイトレーシングを用いた地中レーダの波動伝播シミュレーション, 物理探査学会 第140回学術講演会, 2019.06.
23. Shape Reconstruction of Tunnel Tombs Using GPR.
24. Sparse Inversion of Geophysical Exploration Data.
25. Natural state and production-reinjection simulation in the Ogiri geothermal reservoir.
26. Monitoring of Geothermal Reservoir Using Fluid Flow Electromagnetic Method.
27. 3-D Sparse Inversion of Fluid Flow Electromagnetic Method.
28. Improvement of the measurement system for fluid flow electromagnetic method.
29. Ground penetrating radar for Genko Borui.
30. Development of equipment for fluid flow electromagnetic method and monitoring survey of water injection.
31. Effects of construction of soil-cement columns on resistivity measurement by square array resistivity method.
32. GPR survey to detect Genko Borui at Hakozaki campus of Kyushu University.
33. Processing of time series MT data using empirical mode decomposition.
34. Ground penetrating radar survey at Dazaifu Kuratsukasa area (2).
35. Removing coherent noise from magnetotelluric data using cepstrum.
36. Development of an inversion program of marine TEM method using PSO.
37. 1D simulation of marine TEM for developing marine TEM equipment.
38. Shafiqullah WAHAB, 水永 秀樹, 2-D inversion of electrical resistivity data from Aynal copper deposits, Aynak, Afghanistan, 物理探査学会 第137回学術講演会, 2017.11.
39. Geothermal Reservoir Exploration in Okushiri Island Using a Mise-a-la-masse Method.
40. Numerical Simulation of Fluid Flow Electromagnetic Method at Geothermal Area.
41. Ground penetrating radar survey at Dazaifu Kuratsukasa area.
42. Time series analysys for magnetotelluric data using cepstrum.
43. Maryadi, Hideki Mizunaga, Application of artificial neural network on vertical and lateral temperature estimation based on magnetotelluric data, 物理探査学会 第136回学術講演会, 2017.06.
44. Yosef Kebede, Hideki Mizunaga, Magnetotelluric exploration at Tendaho high temperature geothermal field in north east Ethiopia, 物理探査学会 第136回学術講演会, 2017.06.
45. Daniel Gallagher, Hideki Mizunaga, Archaeological prospecting at Dazaifu by FDEM, 物理探査学会 第136回学術講演会, 2017.06.
46. Development of a ray tracing program for seismic refraction analysis.
47. Simulkation of square array resistivity method to detect subsurface layer boundaries.
48. An injection monitoring test by fluid flow electromagnetic method.
49. Cherkose Biruk Abera, Hideki Mizunaga, Exploration og high-enthalpy geothermal resources using magnetotelluric method - a case study of Alto-Langano geothermal field, Ethiopia, 物理探査学会 第136回学術講演会, 2017.06.
50. Development of the equipment for marine MT method.
51. Archaeological Prospecting in Kyusu University.
52. GPR survey at Onigaura tunnel tombs and 2-D simulation.
53. Development of small measurement equipment for fluid flow electromagnetic method.
54. 1-D modeling of TEM method in consideration of IP effect.
55. Numerical simulation of fluid flow electromagnetic method for hydrothermal convection system.
56. Jean d'Amour UWIDUHAYE, 水永 秀樹, SAIBI HAKIM, 2-D gravity modeling, a case study of Kinigi geothermal field, Rwanda, 物理探査学会第135回学術講演会, 2016.10.
57. Sparse inversion of geophysical data using L1 norm minimization.
58. GPR survey at Onigaura tunnel tombs.
59. Reduction of coherent noise from MT data using independent component analysis.
60. Apparent resistivity of airborne and marine TEM methods using coincident loop.
61. Preliminary research of fluid flow electromagnetic method.
62. Hassan MOHAMED, Hideki Mizunaga, Hakim SAIBI, Ali ABDELAZIZ, Three-dimensional Forward Modeling of Geomagnetic Data Using Hexahedral Element with an Application to Zeit Basin Area, Gulf of Suez, Egypt, International Symposium on Earth Science and Technology 2015, 2015.12.
63. Kyosuke TANNO, Hideki Mizunaga, 3-D Inversion of Gravity Method Using Quantum Annealing, International Symposium on Earth Science and Technology 2015, 2015.12.
64. Satoshi TANIMURA, Hideki Mizunaga, Development of One-Dimensional Inversion Program of Marine Controlled Source Electromagnetic (MCSEM) Method with Particle Swarm Optimization, International Symposium on Earth Science and Technology 2015, 2015.12.
65. Keisuke IKEDA, Hideki Mizunaga, GPR survey at Funabaru Ruins in Koga City, Fukuoka Prefecture, Japan, International Symposium on Earth Science and Technology 2015, 2015.12.
66. Shogo HAMADA, Hideki MIZUNAGA, Toshiaki TANAKA, Research about Measurement of Marine MT Probe's Posture, International Symposium on Earth Science and Technology 2015, 2015.12.
67. Jean d'Amour UWIDUHAYE, Hideki MIZUNAGA, 3-D Simulation of Gravity Method Using Gauss-Legendre Integration, International Symposium on Earth Science and Technology 2015, 2015.12.
68. Akitaka NAKAMURA, Hideki MIZUNAGA, Saline Contamination Research in Motooka Using TEM method, International Symposium on Earth Science and Technology 2015, 2015.12.
69. Long-distance directional drilling technology in chemical grouting method - development of wireless orbit measurement system -.
70. Development of measurement system for drilling bit position of non-open cut method.
71. Three-dimensional Modeling of Airborne TEM Method.
72. 3-D simulation of fluid flow electromagnetic method considering subsurface fluid flow.
73. 3-D simulation of radiometric method.
74. GPR survey at Funabaru ruins in Koga city, Fukuoka prefecture.
75. 3-D inversion of gravity method usingquantum annealing.
76. Ground water survey for saline contamination by using TEM method.
77. Ground Penetrating Radar Survey at Funabaru Tumulus.
78. Weighted correlation tomography for fluid flow electromagnetic method.
79. Kyoshke Tanno, Hideki Mizunaga, Three-dimensional Forward Modeling of the Gravity Exploration Using the Hexahedral Element, International Symposium on Earth Science and Technology 2014, 2014.12.
80. Satoshi Tanimura, Hideki Mizunaga, Yutaka SASAKI, One-dimensional Modeling of Marine Controlled Source Electromagnetic (MCSEM) Method, International Symposium on Earth Science and Technology 2014, 2014.12.
81. Kenta Kuma, Hideki Mizunaga, Toshiaki TANAKA, Three-dimensional Modeling and Inversion of Fluid Flow Electromagnetic Method, International Symposium on Earth Science and Technology 2014, 2014.12.
82. Shota Kukita, Hideki Mizunaga, Three-dimensional Forward Modeling of Airborne TEM Method, International Symposium on Earth Science and Technology 2014, 2014.12.
83. Measurement System of Drilling Position for MWD.
84. Wireless data transmission experiments in vegetation environment for a measurement system of fluid flow electromagnetic method.
85. Development of Measurement System to Detect Drilling Position.
86. Three-dimensional Forward Modeling of Airborne TEM Method.
87. The numerical Modeling of Fluid Flow Electromagnetic Method in 3-D Heterogeneous Structure.
88. 1-D Modeling of Marine CSEM Method for Methane Hydrate Exploration.
89. 3-D Modelig of Gravity Method Using Hexahedral Element.
90. Shota Kukita, Hideki Mizunaga, Toshiaki TANAKA, 3-D Forward Modeling of Airborne TEM Method for Wide Geothermal Area, Grand renewable Energy 2014 International Conference, 2014.07.
91. Kenta Kuma, Hideki Mizunaga, Toshiaki TANAKA, Three-dimensional Numerical Simulation of Fluif Flow Electromagnetic Method for Geothermal Fluid, Grand renewable Energy 2014 International Conference, 2014.07.
92. Ground Penetrating Radar Survey at Ikisan-Chosizuka Tomb.
93. Inversion of MT Data Using Ensemble Kalman Filter.
94. Fundamental Experiments of Time-domain IP Method Considering Rectifying Characteristics.
95. 3-D Modeling of Gravity Gradient Using Hexahedral Element.
96. Takeru Okuzawa, Hideki Mizunaga, New Algorithm to Calculate Transient Response of Time-domain IP Method, International Symposium on Earth Science and Technology 2013, 2013.12.
97. Takeru Okuzawa, Toshiaki Tanaka, Hideki Mizunaga, Development of a Practical Measurement Equipment for Time-domain IP Method, International Symposium on Earth Science and Technology 2013, 2013.12.
98. Kenta Kuma, Hideki Mizunaga, Three-dimensional Forward Modeling Program of Fluid Flow Electromagnetic Method, International Symposium on Earth Science and Technology 2013, 2013.12.
99. Shota Kukita, Hideki Mizunaga, Field Experiment and 3-D Numerical Modeling of UXO Detection by TEM Method, International Symposium on Earth Science and Technology 2013, 2013.12.
100. Shota KUKITA, Hideki Mizunaga, UXO detection using small loop TEM method, The 11th SEGJ International Symposium, 2013.11.
101. Tateyuki NEGI, Hideki MIZUNAGA, Yuji MITSUHATA, Quality improvement in the magnetotelluric spectrum using multiple far remote references, The 11th SEGJ International Symposium, 2013.11.
102. Development of a measurement system for time-domain IP method.
103. New Calculation Method for Transient Response of Time Domain IP Method.
104. 1-D inversion of MT method considering IP effect.
105. Development of measurement system for the fluid flow electromagnetic method using a low-power wireless sensor network.
106. Three-Dimensional Inversion of Fluid Flow Electromagnetic Method.
107. UXO detection by small loop TEM method.
108. Development of simultaneously multipoint measurement system using wireless sensor networks for fluid flow electromagnetic method.
109. Jacobian-free inversion of geophysical data.
110. Tree-dimensional inversion of fluid flow electromagnetic method.
111. Ground penetrating radar survey at Shinmachi megalithic dolmens.
112. High-resolution cumputation of Jacobian using hyperreal number.
113. Development of 2.5-D modeling program for time-domain IP method.
114. Basic experiment for development of the measurement equipment for time-domain IP method.
115. The Calculation Technique for Magnetotelluric Impedance Considering the Existence of Noise.
116. Three dimensional magnetotelluric imaging of the source area of the 2000 Western Tottori earthquake using heterogeneous smoothness-constraint least-squares method.
117. Numerical modeling of ground penetrating radar using FDTD method.
118. The efficacy of SIP parameterical analysis using modefied Cole-Cole equations.
119. Three dimensional magnetotelluric inversion using heterogeneous smoothness-constraint least-squares method.
120. Development of multipoint measurment system for monitoring geothermal fuluid-flow behavior by fluid flow electromagnetic method.
121. Basic study on numerical Hankel transform in electric and electromagnetic methods.
122. Three-dimensional modeling of time-domain IP method.
123. Archaeological prospecting at Antokudai ruins using ground penetrating radar.
124. Ground penetrating radar survey at Iwara-Yarimizo ruin.
125. 2.5-D inversion of time-domain IP method.
126. Improvement of the numerical Hankel transform in marine CSEM method.
127. Joint Analysis of Marine MT and CSEM Data.
128. Simulation of Fluid Flow Electromagnetic Method.
129. Development of Measurement System for Geothermal Fluid Flow Monitoring by Fluid Flow Electromagnetic Method.
130. GPR survey at Antokudai ruins.
131. New method to estimate IP parameters using modified Cole-Cole equation.
132. 2.5-D modeling of time-domain IP method.
133. Improvement of a small MT equipment for monitoring survey.
134. Development of Measurement System for Fluid Flow Electromagnetic Method.
135. Development of Measurement System for Fluid Flow Electromagnetic Method.
136. High-precision Computation of Hankel Transform Using Continuous Euler Transformation.
137. Development of a Small MT Equipment for Monitoring Survey
.
138. Development of Analysis Program for TEM Method
.
139. Three-dimensional modeling of electromagnetic method
.
140. Archaeological prospecting at Iwara-Yarimizo site using GPR (2).
141. Simulation of methane hydrate using marine resistivity method.
142. Fluid flow tomography survey at Yamakawa geothermal area.
143. Experimental study of UXO detection using electromagnetic method.
144. The education and human resource development for earth resources in Kyushu university.
145. Development of measurement system for Fluid Flow Electromagnetic method - Experimantal production of portable triaxial megnetometer -.
146. Test Experiment of Fluid Flow Electromagnetic Method.
147. Archaeological Prospecting at Ito Campus of Kyushu University.
148. Numerical analysis of SP data using immune algorithm.
149. Tree-dimensional inversion of mise-a-la-masse method using correlation tomography.
150. Reservoir Monitoring by 4-D Geophysics.
151. Reservoir Monitoring by 4-D Geophysics.
152. Simulation of IP effect for the mise-a-la-masse method.
153. Self-potential data Analysis by Charge Occurrence Probability Tomography.
154. Three-dimensional Inversion of Self Potential Method.
155. Imaging Fluid-Flow by 4-D Geoelectrical Techniques.
156. Magnetotelluric Survey in Takigami Geothermal Field.
157. Data analysis of apparent resistivity profile using dconvolution filter .
158. Reservoir Monitoring by a 4-D Geoelectrical Prospecting.
159. Three-dimensional analysis of Fluid Flow Tomography data.
160. Three-dimensional imaging of internal structure of ancient mounded tomb.
161. Three-dimensonal resistivity inversion using Schlumberger data.
162. Three-dimensonal inversion of the mise-a-la-masse method.
163. Groundwater survey at Motooka area in Fukuoka.
164. Data analysis of three-dimensional resistivity survey.
165. Seismic refraction survey at Iwabaru-Furagozuka Kofun.
166. Archaeological survey at Mizukiato in Dazaifu.
167. Ground penetrating radar survey for keyhole-shaped mounded tomb.
168. Fluid flow tomography at Onuma geothermal field.
169. Fluid flow tomography survey in Mori geothermal field.
170. Fluid flow tomography survey for geothermal reservoirs in Sumikawa geothermal field, Akita, Japan.
171. Fluid Flow Tomography Survey for Geothermal Reservoirs in Sumikawa Geothermal Field, Akita, Japan.
172. 3D modeling of magnetotelluric soundings.
173. Monitoring of groundwater contamination by transient electromagnetic method.
174. Three-dimensional inversion of vertical electric soundings.
175. Analysis of Fluid Flow Tomography Data.
176. Three-dimensional inversion of Schlumberger VES data.
177. Joint inversion of TEM and MT data.
178. Study on SP Tomography.
179. Probability tomography od SP method.
180. Geophysical explorations for archaeological ruins.
181. Electrical prospecting for a keyhole-shaped mounded tomb.
182. Monitoring of groundwater aquifer by vertical electric soundings.
183. Three-dimensional EM modeling in the Laplace domain.
184. Fluid Flow Imaging by Fluid Flow Tomography Method.
185. Imaging of Gold Deposit by Vertical Electric Sounding Method .
186. Imaging of fractures by electrical methods.
187. Keisuke USHIJIMA, Hideki MIZUNAGA, Chika SAKAMOTO, 3D Imaging of Monumental Tombs Buried in Keyhole-shaped Tumuli by Electrical Prospecting, Second International Conference on Archaeological Prospection 1997, 1997.09.
188. Archaeological prospecting using electrical resistivity method - Case history of Kaibukiyama ancient tomb -.
189. Groundwater exploration by self-potential method.
190. Data processing for the fluid flow tomography method.
191. 2D inversion of MT data.
192. Fluid Flow Monitoring by Electrical Prospecting.
193. Fracuture Detection by Spontaneous Polarization Logs.
194. Ogachi project for Hot Dry Rock Geothermal Power (6) - Reservoir Evaluation by AE and VEP Measurements -.
195. Tree-dimensional inversion of the Mise-a-la-masse Data.
196. Monitoring of EOR operations by electrical prospecting (II).
197. Monitoring of EOR・IOR operations by electrical prospecting.
198. Data processing for the mise-a-la-masse survey.
199. Three-dimensional mise-a-la-masse modeling using horizontal well.
200. Inversion interpretation of the mise-a-la-masse data.
201. Archaeological prospecting by DEF method.
202. Erectrical resistivity survey for archaeological tombs.
203. Monitoring of EPR operations by electrical prospecting.
204. Ogachi Project for Hot Dry Rock Geothermal Power (5) - AE and VEP measurements During Water Injection and Fracturing Tests -.
205. Monitoring of EOR Operations by Electrical Prospecting.
206. Groundwater exploration in MK area.
207. Three-dimensional inversion of self potensial data.
208. Electrical prospecting in Iwatoyama ancient tomb, Yame, Fukuoka.
209. Fracture evaluation by electrical prospecting.
210. Hideshi KAIEDA, Yasuhiro Fujimitsu, Takeshi YAMAMOTO, Hideki MIZUNAGA, Keisuke USHIJIMA, Shunji SASAKI, AE and Mise-a-la-masse Measurements during a 22-day Water Circulation Test at Ogachi HDR site, Japan, World Geothermal Congress, 1995, 1995.05.
211. 3D numerical modeling for mise-a-la-masse method.
212. Fluid flow imaging of the Earth's interior by electrical prospecting - Three dimensional modeling of SP data - .
213. Vertical erectric sounding at Motooka and Kuwabara areas in Fukuoka city.
214. Fluid Flow Monitoring by Electrical Prospecting - Three Dimensional Inversion of SP Data -.
Membership in Academic Society
  • Society of Exploration Geopysicists, Japan
  • The Geothermal Research Society of Japan
  • Mining and Materials Processing Institute of Japan
  • The Japanese Association for Petroleum Technology
  • Archaeological Prospection Society of Japan