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首页> 外文会议>Thirtieth workshop on geothermal reservoir engineering >IMAGING GEOTHERMAL FRACTURES BY CSAMT METHOD ATTAKIGAMI AREA IN JAPAN
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IMAGING GEOTHERMAL FRACTURES BY CSAMT METHOD ATTAKIGAMI AREA IN JAPAN

机译：用CSAMT方法在日本阿塔卡格密地区成像地热裂缝

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摘要

Controlled Source Audio-frequency Magneto-Telluricrn(CSAMT) survey was carried out in Takigami geothermalrnfield. Stations were taken closely with regular grid spacingrnof 150 m. The purpose of the measurements is to delineate arndetailed resistivity structure and location of electricalrndiscontinuities that may reflect a possible faults andrnfractures correlated with a promising reservoir. Althoughrnthe CSAMT measurements were conducted at a distance ofrn6 km away from a transmitter, the CSAMT data stillrncontain some near field data when the frequency fromrntransmitter signal is low range. Therefore, before applyingrntwo-dimensional (2-D) magnetotelluric (MT) inversionrnanalysis of transverse magnetic (TM) mode, datarncorrections for a near field and transition zone were made.rnThe interpretation results based on 2-D inversion show thatrnthere are some electrical discontinuities are found in the NSrnand W-E directions, which correlate with the trend ofrnsome faults where the geothermal reservoir may exist. Thernelectrical discontinuity Fd in N-S direction correlates withrnthe Noine fault zone, which divides the subsurface intorneastern and western parts according to the characteristics ofrnelectrical resistivity, permeability, temperature, andrnreservoir depth. The electrical discontinuity Fa in W-Erndirection corresponds to the Teradoko fault where the majorrnproduction wells have been drilled in the area.
机译：在T上地热田进行了受控源音频-电磁-地磁（CSAMT）调查。站以150 m的规则网格间距紧密靠近。测量的目的是勾勒出详细的电阻率结构和不连续性的位置，以反映可能的断层和与有希望的储层相关的断裂。尽管CSAMT测量是在距发射器6 km的距离处进行的，但是当发射器信号的频率处于低范围时，CSAMT数据仍包含一些近场数据。因此，在对横向磁模式进行二维（2-D）大地电磁（MT）反演之前，对近场和过渡带进行了数据校正。基于2-D反演的解释结果表明，存在一些电气不连续性在NSrnand WE方向上发现，这与可能存在地热储层的某些断层的趋势有关。 N-S方向的电不连续性Fd与正弦断层带相关，正弦断层带根据电阻率，渗透率，温度和储层深度的特征将地下划分为东西部。沿W向的电气不连续性Fa对应于Teradoko断层，该区域已在该处钻出了主要的生产井。

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  • 会议地点 Stanford CA(US)
  • 作者

    Koichi Tagomori; Enjang Mustopa; Hisashi Jotaki; Hideki Mizunaga; Keisuke Ushijima;

  • 作者单位

    West Japan Engineering Co. Watanabe-Dori 2-1-82, Fukuoka 810-0004, Japan tagomori@wjec.co.jp;

    West Japan Engineering Co. Watanabe-Dori 2-1-82, Fukuoka 810-0004, Japan;

    West Japan Engineering Co. Watanabe-Dori 2-1-82, Fukuoka 810-0004, Japan;

    West Japan Engineering Co. Watanabe-Dori 2-1-82, Fukuoka 810-0004, Japan;

    West Japan Engineering Co. Watanabe-Dori 2-1-82, Fukuoka 810-0004, Japan;

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