中国大陆科学钻探主孔钻孔崩落与现场应力状态的确定
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摘要
中国大陆科学钻探主钻孔在1200m深度以下出现了钻孔崩落现象,我们在1200m至2015m的范围内采集了82个钻孔成像测井图象资料。对钻孔崩落长轴方位进行了方向统计,结果表明近似对称的崩落平均方位为324.8°±3.3°,对应的平均最大水平主应力方位为54.8°±3.3°。利用崩落形状要素(崩落深度和崩落宽度)以及岩石力学实验确定的岩石内聚力和摩擦系数,计算了1269m、1500m、2000m等16个深度上的最大和最小水平主应力的大小。根据岩石密度测井资料计算了各个深度上静负载应力。三个主应力的大小和方向反映出主钻孔位置的应力场处于走滑应力状态,与地震震源机制解得到的走滑应力场一致。
The breakouts began to occur under the depth of 1200m in the main borehole of Chinese Continental Scientific Drilling (CCSD), 82 breakout images are collected from acoustic borehole televiewer data between 1200m and 2010m. The averaged orientation of breakouts is 324. 8° ±3. 3°. The averaged orientation of maximum horizontal stress is 54. 8° ± 3. 3°. Using parameters measured from breakouts (depth and width of breakout) and rock cohesive strength determined from triaxial rock compression and deformation test, the magnitudes of principal stress are calculated at 16 different depths of 1269m, 1500m, 2000m and so on. Overburden stress is calculated using the density logging data. According to the orientations and magnitudes of three principal stresses, the least principal stress is horizontal, and stress state ( SH > SV > Sh) determined from the analysis of wellbore breakouts of CCSD indicates the strike-slip stress regime and is coincident with the strike-slip stress field observed from earthquake focal plane mechanisms.
The breakouts began to occur under the depth of 1200m in the main borehole of Chinese Continental Scientific Drilling (CCSD), 82 breakout images are collected from acoustic borehole televiewer data between 1200m and 2010m. The averaged orientation of breakouts is 324. 8° ±3. 3°. The averaged orientation of maximum horizontal stress is 54. 8° ± 3. 3°. Using parameters measured from breakouts (depth and width of breakout) and rock cohesive strength determined from triaxial rock compression and deformation test, the magnitudes of principal stress are calculated at 16 different depths of 1269m, 1500m, 2000m and so on. Overburden stress is calculated using the density logging data. According to the orientations and magnitudes of three principal stresses, the least principal stress is horizontal, and stress state ( SH > SV > Sh) determined from the analysis of wellbore breakouts of CCSD indicates the strike-slip stress regime and is coincident with the strike-slip stress field observed from earthquake focal plane mechanisms.
引文
Barton C A, Zoback M D, Burns K L. 1988. In-situ stress orientation and magnitude at the Fenton geothermal site, New Mexico, determined from wellbore breakouts. Geophysical Research Letters, 15(5) :467-470
Bell J S, Gpugh D 1. 1979. Northeast-southwest compressive stress in Alberta-Evidence from oil wells. Earth and Planetary Science Letters, 45:475-482
Bungum H, Alsaker A, Kvamme L B, Hansen R A. 1991. Seismicity and seismotectonics of Norway and nearby continental shelf areas. Journal of Geophysical Research, 96(B2), 2249-2265
Dong X G, Zhou C Y, Li H, Zheng J C. 1999. Study on tectonic stress field and the seismicity in Shandong area. Earthquake research in Plateau, 11(3):37-43(in Chinese with English abstract)
Gough D I, Bell J S. 1982. Stress orientations from oil-well fractures with examples from Colorado, east Texas, and northern Canada. Canadian Journal of Earth Sciences, 19(7) :1358-1370
Hickman S H, Healy J H, Zoback M D. 1985. In situ stress, natural fracture distribution, and borehole elongation in the Auburn Geothermal Well, Auburn, New York. Journal of Geophysical Research, 90(B7): 5497-5512
Hua A J, Zhou C Y, Liu X L. 1997. Traced study on stress field region in Yishu fault zone and Cangshan earthquake of Ms 5. 2. Journal of Seismology, (3) : 18-23(in Chinese with English abstract)
Huber K, Fuchs K, Palmer J, Roth F, Khakaev B, Van-Kin L, Pevzner L, Moos D, Zoback M D, Schmitt D. 1997. Analysis of borehole televiewer measurements in the Vorotilov drillhole, Russia -first results. Tectonophysics, 275(1-3) : 261-272
Plumb R A, Hickman S H. 1985. Stress-induced borehole elongation: a comparison between the four-arm dipmeter and the borehole televiewer in the Auburn geothermal well. Journal of Geophysical Research, 90 (B7), 5513-5521
Vernik L, Zoback M D. 1992. Estimation of the maximum horizontal principal stress magnitude from stress-induced wellbore breakouts in the Cajon Pass scientific research borehole. Journal of Geophysical. Research, 97(B4) : 5109-5119
Xie Z, liu Y X, Hu W J, Xie JJ, Ma j L, Zhao H. 2002. The focal mechanism of earthquake in Henan and its adjacent region. Northwestern Seismological Journal, 24 (3 ):283-286 (in Chinese with English abstract)
Yu Y X, Xu Z H. 1994. A study on orientations of horizontal principal stress in Jizhong depression using borehole breakout data. Petroleum Exploration and Development, 21 (2): 48-55 (in Chinese with English abstract)
Yu Y X, Xu Z H. 19%. The inverse of the stress slate of upper crust in Jizhong depression using borehole breakout data from inclined well. Acta Seismologica Sinica, 18 (2) : 246-253 (in Chinese with no English abstract)
Zhou C Y, Jiang Z F, Wang H W, Dong X G, Ma Y X, fang Y L. 1994. Dynamic variation of stress field and seismic activity in juncture area of Jiangsu, Shandong and Yellow Sea. Seismological Research of Northeast China, 10(1) :10-17(in Chinese with English abstract)
Zoback M D, Moos D, Mastin L, Anderson R N. 1985. Well bore breakouts and in situ stress. Journal of Geophysical Research, 90 (B7):5523-5530
Zoback M L, Zoback M D. 1989. Tectonic stress field of the continental United States. In: Paiser L C, Mooney W D, ( eds. ). Geophysical Framework of the Continental United States: Boulder, Colorado, Geological Society of America Memoir, 172:523-539
Zoback M L. 1992. First-and Second-Order Patterns of Stress in the Lithosphere: The World Stress Map Project. Journal of Geophysical Research, 97 (B8), 11703-11728
俞言祥,许忠淮．1994．用钻孔崩落法研究冀中坳陷水平主应力方向．石 油勘探与开发,21(2):48—55
俞言祥,许忠淮．1996．利用斜井钻孔崩落资料反演冀中坳陷土地壳应 力状态．地震学报,18(2):246-253
周翠英,姜早峰,王红卫,董旭光,马玉香,房玉兰．1994．苏鲁交界至南 黄海地区应力场的动态变化与地震活动．东北地震研究,10(1): 10-17
华爱军,周翠英,刘西林．1997．沂沭带应力场动态追踪研究与苍山5．2 级地震．地震学刊,(3):18-23
谢智,刘尧兴,胡卫健,谢健健,马俊林,林晖．2002．河南及邻区地震的 震源机制．西北地震学报,24(3):283—286
董旭光,周翠英,李红,郑建常．1999．山东地区现今构造应力场与地震 活动．高原地震,11(3):37—43
Bell J S, Gpugh D 1. 1979. Northeast-southwest compressive stress in Alberta-Evidence from oil wells. Earth and Planetary Science Letters, 45:475-482
Bungum H, Alsaker A, Kvamme L B, Hansen R A. 1991. Seismicity and seismotectonics of Norway and nearby continental shelf areas. Journal of Geophysical Research, 96(B2), 2249-2265
Dong X G, Zhou C Y, Li H, Zheng J C. 1999. Study on tectonic stress field and the seismicity in Shandong area. Earthquake research in Plateau, 11(3):37-43(in Chinese with English abstract)
Gough D I, Bell J S. 1982. Stress orientations from oil-well fractures with examples from Colorado, east Texas, and northern Canada. Canadian Journal of Earth Sciences, 19(7) :1358-1370
Hickman S H, Healy J H, Zoback M D. 1985. In situ stress, natural fracture distribution, and borehole elongation in the Auburn Geothermal Well, Auburn, New York. Journal of Geophysical Research, 90(B7): 5497-5512
Hua A J, Zhou C Y, Liu X L. 1997. Traced study on stress field region in Yishu fault zone and Cangshan earthquake of Ms 5. 2. Journal of Seismology, (3) : 18-23(in Chinese with English abstract)
Huber K, Fuchs K, Palmer J, Roth F, Khakaev B, Van-Kin L, Pevzner L, Moos D, Zoback M D, Schmitt D. 1997. Analysis of borehole televiewer measurements in the Vorotilov drillhole, Russia -first results. Tectonophysics, 275(1-3) : 261-272
Plumb R A, Hickman S H. 1985. Stress-induced borehole elongation: a comparison between the four-arm dipmeter and the borehole televiewer in the Auburn geothermal well. Journal of Geophysical Research, 90 (B7), 5513-5521
Vernik L, Zoback M D. 1992. Estimation of the maximum horizontal principal stress magnitude from stress-induced wellbore breakouts in the Cajon Pass scientific research borehole. Journal of Geophysical. Research, 97(B4) : 5109-5119
Xie Z, liu Y X, Hu W J, Xie JJ, Ma j L, Zhao H. 2002. The focal mechanism of earthquake in Henan and its adjacent region. Northwestern Seismological Journal, 24 (3 ):283-286 (in Chinese with English abstract)
Yu Y X, Xu Z H. 1994. A study on orientations of horizontal principal stress in Jizhong depression using borehole breakout data. Petroleum Exploration and Development, 21 (2): 48-55 (in Chinese with English abstract)
Yu Y X, Xu Z H. 19%. The inverse of the stress slate of upper crust in Jizhong depression using borehole breakout data from inclined well. Acta Seismologica Sinica, 18 (2) : 246-253 (in Chinese with no English abstract)
Zhou C Y, Jiang Z F, Wang H W, Dong X G, Ma Y X, fang Y L. 1994. Dynamic variation of stress field and seismic activity in juncture area of Jiangsu, Shandong and Yellow Sea. Seismological Research of Northeast China, 10(1) :10-17(in Chinese with English abstract)
Zoback M D, Moos D, Mastin L, Anderson R N. 1985. Well bore breakouts and in situ stress. Journal of Geophysical Research, 90 (B7):5523-5530
Zoback M L, Zoback M D. 1989. Tectonic stress field of the continental United States. In: Paiser L C, Mooney W D, ( eds. ). Geophysical Framework of the Continental United States: Boulder, Colorado, Geological Society of America Memoir, 172:523-539
Zoback M L. 1992. First-and Second-Order Patterns of Stress in the Lithosphere: The World Stress Map Project. Journal of Geophysical Research, 97 (B8), 11703-11728
俞言祥,许忠淮．1994．用钻孔崩落法研究冀中坳陷水平主应力方向．石 油勘探与开发,21(2):48—55
俞言祥,许忠淮．1996．利用斜井钻孔崩落资料反演冀中坳陷土地壳应 力状态．地震学报,18(2):246-253
周翠英,姜早峰,王红卫,董旭光,马玉香,房玉兰．1994．苏鲁交界至南 黄海地区应力场的动态变化与地震活动．东北地震研究,10(1): 10-17
华爱军,周翠英,刘西林．1997．沂沭带应力场动态追踪研究与苍山5．2 级地震．地震学刊,(3):18-23
谢智,刘尧兴,胡卫健,谢健健,马俊林,林晖．2002．河南及邻区地震的 震源机制．西北地震学报,24(3):283—286
董旭光,周翠英,李红,郑建常．1999．山东地区现今构造应力场与地震 活动．高原地震,11(3):37—43
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