| 唐山、天津和沧州地区的油井水力压裂应力测量 |
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| 引用本文： | 丁健民,梁国平.唐山、天津和沧州地区的油井水力压裂应力测量[J].地震学报,1985,7(4):363-373. |
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| 作者姓名： | 丁健民 梁国平 |
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| 作者单位： | 国家地震局地震地质大队 |
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| 摘 要： | 本文研究了唐山、天津和沧州地区的油井压裂记录,发现已充砂裂缝比未充砂裂缝条件下测得的瞬时闭合压力明显增高,并指出这一差值乃是由裂缝内砂子的支撑作用引起的。因此,在采用油井压裂记录确定地应力时,应考虑裂缝中砂子支撑作用带来的影响。 本文还对该地区具有未充砂条件下的油井压裂记录进行了分析,讨论了油井水力压裂应力测量的力学机制和解释方法。 最后讨论了油井水力压裂应力测量结果,得出该地区0——4000米深度范围内主应力随深度的线性变化关系,表明分布在该地区的北北东向断裂的现今活动,是属于右旋走向滑动类型。
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STRESS MEASUREMENT BY HYDRAULIC FRACTURING IN OIL-WELLS OF NORTE CHINA |
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| Institution: | Seismological Brigade, State Seismological Bureau |
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| Abstract: | This paper discusses the data of hydraulic fracturing in oil-wells collected from Tangshan,Tianjin and Cangzhou in North China. It has been found that the instantaneous shut-in pressure,measured in wells with sand-filled fissures is definitely higher than that without sand-filled fissures. The authors suggest that such a difference is caused by the supporting action of the sand in the fissures. Therefore,the effect of the supporting action of sand in fissures,must be considered when stress is to be determined by using the data of hydraulic fracturing.The data obtained from oil-wells without sandfilling of fissures are analysed,and then the physical mechanism and the method of explanation for stress measurement by hydraulic fracturing in oil-wells are discussed.Finally,the results of stress measurement are also discussed. The changes of principal stress with depth between 0-4000 meters in these areas are determined. It turns out that the activities of the north-north east faults are of righthanded strike-slip type. |
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