An example of defining a hydraulically created cracks with a cross-borehole mise-à-la-masse method is presented. Potential anomaly was clearly measured after the hydraulic fracturing at Higashi Hachimantai geothermal field. This anomaly is caused by the created artificial crack filled with the conducting fluid used for the hydraulic fracturing. Two numerical methods, namely, the axially symmetrical 2-D finite element method (FEM) and the 3-D volume integral equation approach were used for an interpretation of the measured data of the excited potential. Effects of the conductivity inhomogeneity of the host rocks was discussed by the numerical results given by the 2-D FEM. The size and the orientation of the created crack was expected by the 3-D volume integral equation approach.
|Number of pages||4|
|Publication status||Published - 1987 Jan 1|
|Event||1987 Society of Exploration Geophysicists Annual Meeting, SEG 1987 - New Orleans, United States|
Duration: 1987 Oct 11 → 1987 Oct 15
|Other||1987 Society of Exploration Geophysicists Annual Meeting, SEG 1987|
|Period||87/10/11 → 87/10/15|
ASJC Scopus subject areas