Abstract
An automatic measurement system by means of conductive potential and self-potential methods (fluid flow tomography method) has been developed to measure the change of geothermal steam fluid during production and injection. For the fluid flow tomography method, the four-electrode configuration of the conductive potential method is adopted using the casing pipe of well as a current source. A lot of potential receiving electrodes are connected to the earth, preliminarily. The surface potential profile is measured, which is formed during the injection and production of the fluid through the well. Artificial and spontaneous potential profiles were continuously measured using this system during the hydraulic crushing tests at the test field of hot dry rock power generation at Ogachi-machi, Akita Prefecture. As a result of inversion analysis of self-potential data using a four-layer structural model of specific resistance, it was observed that the fluid injected at the depth of 711 m in the borehole permeated into the depth between 700 and 770 m in the south-eastern part of the well, and that the fractures propagated into the deeper part, gradually with the progress of hydraulic crushing test. 3 figs.
Ushijima, K;
Mizunaga, H;
Tanaka, T;
[1]
Hashimoto, K
[2]
- Kyushu University, Fukuoka (Japan). Faculty of Engineering
- Kyushu Electric Power Co. Inc., Fukuoka (Japan)
Citation Formats
Ushijima, K, Mizunaga, H, Tanaka, T, and Hashimoto, K.
Data processing for the fluid flow tomography method; Ryutai ryudo den`iho no data kaiseki.
Japan: N. p.,
1997.
Web.
Ushijima, K, Mizunaga, H, Tanaka, T, & Hashimoto, K.
Data processing for the fluid flow tomography method; Ryutai ryudo den`iho no data kaiseki.
Japan.
Ushijima, K, Mizunaga, H, Tanaka, T, and Hashimoto, K.
1997.
"Data processing for the fluid flow tomography method; Ryutai ryudo den`iho no data kaiseki."
Japan.
@misc{etde_522662,
title = {Data processing for the fluid flow tomography method; Ryutai ryudo den`iho no data kaiseki}
author = {Ushijima, K, Mizunaga, H, Tanaka, T, and Hashimoto, K}
abstractNote = {An automatic measurement system by means of conductive potential and self-potential methods (fluid flow tomography method) has been developed to measure the change of geothermal steam fluid during production and injection. For the fluid flow tomography method, the four-electrode configuration of the conductive potential method is adopted using the casing pipe of well as a current source. A lot of potential receiving electrodes are connected to the earth, preliminarily. The surface potential profile is measured, which is formed during the injection and production of the fluid through the well. Artificial and spontaneous potential profiles were continuously measured using this system during the hydraulic crushing tests at the test field of hot dry rock power generation at Ogachi-machi, Akita Prefecture. As a result of inversion analysis of self-potential data using a four-layer structural model of specific resistance, it was observed that the fluid injected at the depth of 711 m in the borehole permeated into the depth between 700 and 770 m in the south-eastern part of the well, and that the fractures propagated into the deeper part, gradually with the progress of hydraulic crushing test. 3 figs.}
place = {Japan}
year = {1997}
month = {May}
}
title = {Data processing for the fluid flow tomography method; Ryutai ryudo den`iho no data kaiseki}
author = {Ushijima, K, Mizunaga, H, Tanaka, T, and Hashimoto, K}
abstractNote = {An automatic measurement system by means of conductive potential and self-potential methods (fluid flow tomography method) has been developed to measure the change of geothermal steam fluid during production and injection. For the fluid flow tomography method, the four-electrode configuration of the conductive potential method is adopted using the casing pipe of well as a current source. A lot of potential receiving electrodes are connected to the earth, preliminarily. The surface potential profile is measured, which is formed during the injection and production of the fluid through the well. Artificial and spontaneous potential profiles were continuously measured using this system during the hydraulic crushing tests at the test field of hot dry rock power generation at Ogachi-machi, Akita Prefecture. As a result of inversion analysis of self-potential data using a four-layer structural model of specific resistance, it was observed that the fluid injected at the depth of 711 m in the borehole permeated into the depth between 700 and 770 m in the south-eastern part of the well, and that the fractures propagated into the deeper part, gradually with the progress of hydraulic crushing test. 3 figs.}
place = {Japan}
year = {1997}
month = {May}
}