Development of the EM tomography system by the vertical electromagnetic profiling (VEMP) method
Conference
·
OSTI ID:175644
- Geothermal Energy Research and Development Co., Ltd., Tokyo (Japan); and others
As a part of the {open_quotes}Deep-Seated Geothermal Resources Survey{close_quotes} project being undertaken by the NEDO, the Vertical ElectroMagnetic Profiling (VEMP) method is being developed to accurately obtain deep resistivity structure. The VEMP method acquires multi-frequency three-component magnetic field data in an open hole well using controlled sources (loop sources or grounded-wire sources) emitted at the surface. Numerical simulation using EM3D demonstrated that phase data of the VEMP method is very sensitive to resistivity structure and the phase data will also indicate presence of deep anomalies. Forward modelling was also used to determine required transmitter moments for various grounded-wire and loop sources for a field test using the WD-1 well in the Kakkonda geothermal area. Field logging of the well was carried out in May 1994 and the processed field data matches well the simulated data.
- OSTI ID:
- 175644
- Report Number(s):
- CONF-951037--
- Country of Publication:
- United States
- Language:
- English
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