中国大陆科学钻主孔现今地应力状态

王连捷; 崔军文; 张晓卫; 唐哲民; 李朋武; 李双林

Volume 31 Issue 4

Jul. 2006

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Article Navigation > Earth Science > 2006 > 31(4): 505-512

WANG Lian-jie, CUI Jun-wen, ZHANG Xiao-wei, TANG Zhe-min, LI Peng-wu, LI Shuang-lin, 2006. In-Situ Stress State in the Main Borehole of the Chinese Continental Scientific Drilling. Earth Science, 31(4): 505-512.

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In-Situ Stress State in the Main Borehole of the Chinese Continental Scientific Drilling

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China
3.
Well Logging Company, Shengli Oil Administration, Dongying 257001, China

Received Date: 2006-04-29
Publish Date: 2006-07-25

Abstract

Abstract

The breakouts began to occur under the depth of 1 200 m in the main borehole of Chinese Continental Scientific Drilling (CCSD), 143 breakout images are collected from acoustic borehole televiewer data between 1 216 m and 5 047 m. The average orientation of breakouts is 319.5°±3.5°. The average orientation of maximum horizontal stress is 49.5°±3.5°. Using breakout parameters measured from borehole breakouts (depth and width of breakout) and rock cohesion and inner friction angle determined from triaxial rock compression and deformation tests, the magnitudes of principal stress are calculated at 52 different depths from 1 269 m to 5 047 m. Overburden stress is calculated using the density logging data. The magnitude of maximum principal stress is determined using acoustic emissions. A comparison of measurement results of acoustic emission and borehole breakouts is carried out, and the results from the two methods are in good agreement. According to the orientations and magnitudes of three principal stresses, stress state (S_H > S_v > S_h) in the area of CCSD indicates the strike-slip stress regime and is coincident with the strike-slip stress field observed from earthquake focal plane mechanisms.
- Chinese Continental Scientific Drilling (CCSD),
- borehole breakouts,
- rock stress measurememt,
- acoustic emission measurement

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References(41)

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In-Situ Stress State in the Main Borehole of the Chinese Continental Scientific Drilling

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