Interpretation of pre- and post-fracturing well tests in a geothermal reservoir
Pre- and post-fracturing well tests in TG-2 well drilled next to the Matsukawa field are interpreted for evaluating effects of a massive hydraulic fracturing treatment. The interpreted data include multiple-step rate tests, a two-step rate test, and falloff tests. Pressure behaviors of massive hydraulic fracturing are matched by a simulator of dynamic fracture option. Fracture parting pressures can be evaluated from the multiple-step rate test data. The multiple-step rates during the massive hydraulic fracturing treatment show that multiple fractures have been induced in sequence. Although the pre-fracturing falloff tests are too short, fracture propagation can be evaluated qualitatively from the falloff data. Interpretation of the falloff test immediately after the MHF suggests that extensive fractures have been created by the MHF, which is verified by simulation. The post-fracturing falloff tests show that the fractures created by the MHF have closed to a great degree.
- Research Organization:
- Waseda University, Tokyo, JP; Geothermal Energy Research and Development Co., Ltd., Tokyo, JP; Japan National Oil Corporation, Chiba, JP
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 889353
- Report Number(s):
- SGP-TR-150-9
- Country of Publication:
- United States
- Language:
- English
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