Magnetotelluric exploration of geothermal resources at Takigami area in Japan

Enjang Jaenal Mustopa, Hisashi Jotaki, Hideki Mizunaga, Keisuke Ushijima

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)245-248
Number of pages4
JournalTransactions - Geothermal Resources Council
Volume27
Publication statusPublished - Dec 1 2003
EventInternational Collaboration for Geothermal Energy in the Americas - Geothermal Resources Counsil: 2003 Annual Meeting - Morelia, Michoacan, Mexico
Duration: Oct 12 2003Oct 15 2003

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Magnetotellurics
electrical resistivity
resource
fault zone
Drilling
Temperature distribution
discontinuity
temperature
drilling
permeability
Temperature

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Geophysics

Cite this

Magnetotelluric exploration of geothermal resources at Takigami area in Japan. / Mustopa, Enjang Jaenal; Jotaki, Hisashi; Mizunaga, Hideki; Ushijima, Keisuke.

In: Transactions - Geothermal Resources Council, Vol. 27, 01.12.2003, p. 245-248.

Research output: Contribution to journalConference article

Mustopa, Enjang Jaenal ; Jotaki, Hisashi ; Mizunaga, Hideki ; Ushijima, Keisuke. / Magnetotelluric exploration of geothermal resources at Takigami area in Japan. In: Transactions - Geothermal Resources Council. 2003 ; Vol. 27. pp. 245-248.
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