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An advancement of measurement system for Fluid Flow Tomography method

流体流动层析成像测量系统的改进

基本信息

批准号：
17360434
负责人：
MIZUNAGA Hideki
金额：
$ 3.74万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360434/
关键词：
Fluid flow tomography method Exploration Geophysics Exploration of geothermal reservoir Exploration of oil reservoir Exploration of contaminated ground water Imaging of fluid flow 流体流動電立法免疫アルゴリズム資源流体の可視化モニタリング探査

项目摘要

A Fluid Flow Tomography (FFT) method is an exploration method to visualize the dynamic behavior of fluid resources for example oil, geothermal fluid and ground water etc. This method is the hybrid exploration method that can grasp fluid behavior by observing the transient change of both resistivity and streaming potential which occurs when a subsurface fluid flows. In order to obtain observed data and to analyze the data using the FFT method in real time, the development of the portable measurement system that a high speed sampling is possible in a field and the development of a control program are necessary. In this study, the following research about the advancement of the measurement system of the FFT method was carried out.The development of the measurement system was repeated many times from 2005.Finally the compact measurement system which uses the A/D module of 32 channels was developed in 2007. This measurement system is almost half of the prototype system in size, and the simultaneous measurement of the 256 channel is possible by using this system. The development of data analysis program was investigated in parallel with the development of the measurement system. Three-dimensional inversion programs of both resistivity and self potential method were developed.By using new measurement system, the FFT surveys were carried out around the Yamakawa geothermal power plant in Ibusuki, Kagoshima prefecture, Japan. A preliminary survey was carried out at the power station yard in June, 2007. As a result, a remarkable streaming potential change during injection was able to be observed. A full-scale FFT survey was carried out around the power station in December, 2007. As a result, the location of fault in relation to geothermal reservoir and the direction of subsurface fluid flow were able to be estimated.

流体流动层析成像（Fluid Flow Tomography，FFT）方法是一种可视化流体资源（如石油、地热流体和地下水等）动态的勘探方法。该方法是通过观察地下流体流动时电阻率和流动电位的瞬态变化来掌握流体动态的混合勘探方法。为了获得观测数据并使用FFT方法对数据进行真实的实时分析，需要开发能够在现场进行高速采样的便携式测量系统和开发控制程序。本研究对FFT法测量系统的改进进行了后续研究，从2005年开始多次重复开发，最终在2007年开发出了采用32通道A/D模块的紧凑型测量系统。该测量系统的尺寸几乎是原型系统的一半，并且使用该系统可以同时测量256个通道。数据分析程序的开发与测量系统的开发同时进行。开发了电阻率法和自然电位法的三维反演程序，并采用新的测量系统，对日本鹿儿岛县指宿市山川地热发电厂周围进行了FFT测量。2007年6月，在发电厂场地进行了初步调查。结果，能够观察到注射期间显著的流动电位变化。2007年12月，在电站周围进行了全面的FFT调查。因此，能够估计断层相对于地热储层的位置和地下流体流动的方向。