Hydraulic fracturing and geothermal energy pp 357-371 | Cite as
In-Situ AE Measurement of Hydraulic Fracturing at Geothermal Fields
Abstract
A triaxial acceleration-sense down-hole AE measurement system was developed and successfully applied to the monitoring of both man-made and natural hydraulic fracture in a geothermal field. The acceleration-sense instrumentation allows long-distance measurement of subsurface crack extension. AE events during hydraulic fracturing in Nigorikawa geothermal field could be detected at a distance of 1600m from the AE source. AE events during a closure operation of a well-head valve in the Kakkonda geothermal field could also be detected by the system. In this paper, the feasibility of the simple measurement system for in-situ monitoring of subsurface crack extension in a geothermal field is demonstrated with reference to the fracture mechanics model of a geothermal reservoir.
Keywords
Acoustic Emission Hydraulic Fracture Rock Burst Production Well Geothermal FieldPreview
Unable to display preview. Download preview PDF.
References
- 1.Katagiri, K., Ott, W.K. and Nutley, B.G., “Hydraulic Fracturing Aids Geothermal Field Development”, World Oil, Vol.191, No.7, Dec. 1980, pp75–88.Google Scholar
- 2.Abé, J., Takahashi, H. and Suyama, J., “Hydraulic Fracturing and Geothermal Energy Development in Japan”, presented at Circum-Pacific Energy and Mineral Resources Conf., Honolulu, Hawaii, Aug., 1982.Google Scholar
- 3.Nakatsuka, K., Takahashi, H. and Takanohashi, M., “Hydraulic Fracturing Experiment at Nigorikawa and Fracture Mechanics Evaluation”, presented at 1st Japan US Joint Seminar on Hydraulic Fracturing and Geothermal Energy, Tokyo, Japan, Nov., 1982.Google Scholar
- 4.Sato, K., “Analysis of Geological Structure in the Takinoue Geothermal Area”, Jour. of the Geothermal Research Soc. Japan, Vol.3, No.3, 1982, ppl35–148.Google Scholar
- 5.Hashida, T., Yuda, S., Tamakawa, K. and Takahashi, H., “Determination of Fracture Toughness of Granitic Rock by Means of AE Technique”, Proc. of 6th Intern. AE Symp., Tokyo, Japan, Nov. 1982 (to be published).Google Scholar
- 6.Takahashi, H., “Fracture Toughness Evaluation in the Presence of Pressurized Water at Elevated Temperatures”, presented at 1st Japan US Joint Seminar on Hydraulic Fracturing and Geothermal Energy, Tokyo, Japan, Nov. 1982.Google Scholar
- 7.Hayashi, K. and Abé, H., “Opening of a Fault and Resulting Slip Due to Injection of Fluid for the Extraction of Geothermal Heat”, Jour. of Geophysical Research, Vol.87, No.B2, Feb. 1982, ppl049–1054.Google Scholar
- 8.Dennis, B.R., Hill, J.H., Stephani, E.l., and Todd, B.E., “Development of High-Temperature Acoustic Instrumentation for Characterization of Hydraulic Fractures in Dry Hot Rock”, presented at the 22nd Intern. Instrum. Symp., San Diego, California, May, 1976, pp97–107.Google Scholar
- 9.Takahashi, H., Niitsuma, H., Tamakawa, K., Abé, H., Sato, R. and Suzuki, M., “Detection of Acoustic Emission during Hydraulic Fracturing for Geothermal Energy Extraction”, Proc. 5th Intern. AE Symp., Tokyo, Japan, 1980, PP443–453.Google Scholar
- 10.Nakatsuka, K., Niitsuma, H., Tamakawa, K., Takahashi, H., Abé, H. and Takanohashi, M., “In-situ Measurement of the Extension of Hydraulical-ly-formed Fracture in Geothermal Well by Means of Acoustic Emission” Jour, of the Mining and Metallurgical Institute of Japan, Vol.98, No.1129, 1982, pp209–214. (in Japanese).Google Scholar
- 11.Nakamura, H. and Sumi, K., “Exploration and Development at Takinoue, Japan”, Geothermal Systems: Principles and Case Histories, John Wiley & Sons Ltd, 1981, pp247–272.Google Scholar