重复压裂造缝的应力场分析

<title>alysis on stress field of refracturing fissure generation.

通过对重复压裂造缝的应力场进行分析,推导出满足重复压裂产生新裂缝的条件。主要分析了一次压裂的 裂缝、储层压力等多种因素对当前地应力场的影响,可以看出诱导应力改变了原地应力场,当原应力场最小水平主 应力大于原最大水平主应力时,重复压裂裂缝可能重新定向。

<abstract>rough analyzing stress field of refracturing fissure generation, the conditions are deduced under which the new fissures can be formed in the refracturing. The effect of the fissures and the reservoir pressure of first fracturing on the current stress field is analyzed. It is found that induced stress changes original earth stress field. When the minimum horizontal principal stress in original stress field is greater than the maximum horizontal principal stress, the fissures of the refracturing may be possibly oriented again.