| 对水压致裂法测得的应力结果之重新估价 |
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| 引用本文： | 刘建中,高龙生.对水压致裂法测得的应力结果之重新估价[J].地球物理学报,1989,32(5):528-538. |
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| 作者姓名： | 刘建中 高龙生 |
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| 作者单位： | 1. 国家地震局地壳应力研究所 北京;
2. 国家地震局地球物理研究所 北京 |
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| 摘 要： | 本文讨论了水压致裂进行的绝对应力测量结果的可靠性,指出目前水压致裂法是深部绝对应力测量的较好方法。但应用现在通用的资料处理方法时,它可能给出偏小的最大水平主应力SH和偏大的最小水平主应力Shi特别是两个水平主应力差别较大的地区,这个偏差更加显著。以这样的数据,按照库伦强度准则和Byerlee定律去估价地区稳定性,易于得出与事实不符的结论。本文指出了造成上述测量误差的可能原因,并提出了降低测量误差,改进计算结果的办法。
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| 关 键 词： | 地球应力状态 应力测量 水压致裂 裂缝扩展 |
| 收稿时间： | 1987-01-12 |
REASSESSMENT ON MEASURED RESULTS BY MEANS OF HYDROFRACTURING |
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| LIU JIAN-ZHONG.REASSESSMENT ON MEASURED RESULTS BY MEANS OF HYDROFRACTURING[J].Chinese Journal of Geophysics,1989,32(5):528-538. |
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| Authors: | LIU JIAN-ZHONG |
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| Institution: | 1. Institute of Crustal Dynamics, State Seismological Bureau, Beijing;
2. Institute of Geophysics, State Seismological Bureau, Beijing |
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| Abstract: | This paper discusses the reliability of measured, results of absolute stress with the method of hydrofracturing. It is pointed out that though the hydrofracturing method is relatively a good method for in situ stress measurement in depth at the present time, the routine for treating the records of the hydrofracturing in wells .may give larger maximal principal stresses and smaller minimal principal stresses than the real values, especially for the case of large deviatoric stress. Therefore to judge the stability of a site according to Coulomb Criteria and Byerlee's Law, it is often gives a wrong conclusion. This paper points out possible causes of this mistake in measurement. Also, this paper proposes a new method which may improve the calculation. |
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| Keywords: | Stress measurement Hydrofracturing Crack extension Stress state of the earth |
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