水压致裂法原地应力测量及初步结果
IN-SITU STRESS MEASUREMENT BY HYDRAULIC FRACTURING AND PRELIMINARY RESULTS
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摘要: 水压致裂法是直接测量地壳较深部应力的有效方法.本文介绍了水压致裂法原地应力测量的基本原理、技术方法和主要的仪器设备;给出了1980年在河北省易县和1981年在江苏省新沂县两次野外实测试验结果;对所测得的原地应力的大小和方向及诱发裂缝形态进行了初步讨论;并将水压致裂法测量结果与套芯法结果做了对比.Abstract: The hydraulic fracturing technique is an efficient method for direct determination of in-situ stress in deep (boreholes. This article describes the general principle, technique and instrumentation of hydrofracturing, presents the results of two field hydro-fracturing tests performed in Yisian County, Hebei Province (1980) and Xinyi County, Jiangsu Province (1981) respectively, and gives the magnitudes and directions of the in-situ stresses obtained. The results obtained by hydrofracturing are compared with those by overcoring at the same test sites.
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[1] Haimson, B. C., A simple method for estimating in situ stress at great depths, In Field Testing and Instrumentation of Rock, ASTM Special Tech. Pub, . 544, 156——182. 1974.
[2] RummeI, F., and R. Jung, Hydraulic fracturing stress measurements near the Hohenzollern Gra——ben——Structure, SW Germany, Pure Appl. Geophys. 113, 321——330, 1975.
[3] Hubbert, M. K., and D. G. Willis, Mechanics of hydraulic fracturing, Trans. Am. Inst. Min. Engrs., 210, 153——160, 1957.
[4] Haimson, B. C., The hydrofracturing stress measuring method and recent field results, Int, J. Rock Mech. Min. Sci. and Geomech. Abstr., 15, 167——178, 1978.
[5] 李方全、王连捷, 华北地区地应力测量, 地球物理学报, 22, 1——8, 1979.
[6] 塜原弘昭、池田隆司、佐竹洋、大竹政和高稿博, 静岡県岡部町における水压破壤法による地壳応の测定, 地震, 2, 415——433, 1978.[1] Haimson, B. C., A simple method for estimating in situ stress at great depths, In Field Testing and Instrumentation of Rock, ASTM Special Tech. Pub, . 544, 156——182. 1974.
[2] RummeI, F., and R. Jung, Hydraulic fracturing stress measurements near the Hohenzollern Gra——ben——Structure, SW Germany, Pure Appl. Geophys. 113, 321——330, 1975.
[3] Hubbert, M. K., and D. G. Willis, Mechanics of hydraulic fracturing, Trans. Am. Inst. Min. Engrs., 210, 153——160, 1957.
[4] Haimson, B. C., The hydrofracturing stress measuring method and recent field results, Int, J. Rock Mech. Min. Sci. and Geomech. Abstr., 15, 167——178, 1978.
[5] 李方全、王连捷, 华北地区地应力测量, 地球物理学报, 22, 1——8, 1979.
[6] 塜原弘昭、池田隆司、佐竹洋、大竹政和高稿博, 静岡県岡部町における水压破壤法による地壳応の测定, 地震, 2, 415——433, 1978.
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