Determination of in-situ stress to predict direction of hydraulically created fractures for development of hot dry rock geothermal reservoir in Japan

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It is very important to know the underground stress state to design and complete a Hot Dry Rock geothermal reservoir because the direction of the hydraulic fractures depends on the earth stress. The hydraulic mini fracturing technique was introduced to determine the in-situ stress state without assuming the borehole axis to be parallel to one of the principal stresses. Small scale hydraulic fracturing tests were conducted to verify this technique at an underground power plant and microseismic activities were monitored for fracture mapping. The direction of the fracture propagation was estimated from the in-situ stress state and compared with the ... continued below

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Pages: 5

Creation Information

Kuriyagawa, Michio; Kobayashi, Hideo; Matsunaga, Isao; Kosugi, Masayuki; Yamaguchi, Tsutomu; Sasaki, Shunji et al. January 1, 1985.

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Description

It is very important to know the underground stress state to design and complete a Hot Dry Rock geothermal reservoir because the direction of the hydraulic fractures depends on the earth stress. The hydraulic mini fracturing technique was introduced to determine the in-situ stress state without assuming the borehole axis to be parallel to one of the principal stresses. Small scale hydraulic fracturing tests were conducted to verify this technique at an underground power plant and microseismic activities were monitored for fracture mapping. The direction of the fracture propagation was estimated from the in-situ stress state and compared with the fracture plane mapped by microseismic activities. 2 refs., 7 figs., 1 tab.

Physical Description

Pages: 5

Notes

NTIS, PC A02/MF A01.

Source

  • International symposium on geothermal energy, Kailua Kona, HI, USA, 26 Aug 1985

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  • Other: DE85009639
  • Report No.: LA-UR-85-1004
  • Report No.: CONF-850801-18
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5583199
  • Archival Resource Key: ark:/67531/metadc1087414

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1985

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  • Feb. 10, 2018, 10:06 p.m.

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  • April 19, 2018, 10:12 a.m.

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Kuriyagawa, Michio; Kobayashi, Hideo; Matsunaga, Isao; Kosugi, Masayuki; Yamaguchi, Tsutomu; Sasaki, Shunji et al. Determination of in-situ stress to predict direction of hydraulically created fractures for development of hot dry rock geothermal reservoir in Japan, article, January 1, 1985; United States. (digital.library.unt.edu/ark:/67531/metadc1087414/: accessed September 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.