复合断层对地应力的影响研究  

Study on the influence of composite faults on ground stress

作　　者：倪伟[1] 刘桂玲[1] 林波[1] NI Wei;LIU Guiling;LIN Bo(Exploration and Development Research Institute of Jiangsu Oilfield Company,SINOPEC,Yangzhou 225009,China)

机构地区：[1]中国石化江苏油田分公司勘探开发研究院,江苏扬州225009

出　　处：《复杂油气藏》2018年第4期38-41,50,共5页Complex Hydrocarbon Reservoirs

摘　　要：江苏油田属复杂小断块油田,断裂系统复杂。分析多个油田区块模拟的地应力大小和方向图资料,发现断层附近地应力大小和方向发生较大改变。利用有限元法模拟研究了平行断层和交叉断层对地应力的影响。研究结果表明,交叉断层对2倍断距范围内区域的地应力影响较大,而且断层对主应力大小和方向的改变非同步。Most of oilfields in Jiangsu Oilfield are small complex fault-blocks with complicated fracture systems.According to information in the magnitude and direction diagram of simulated ground stresses for several oilfields,it was found larger changes in the magnitude and direction of ground stress near fault.The finite element method was used to simulate the effects of parallel and cross faults on ground stress.The results of this study indicated that the cross-fault has a great influence on in-situ stress in the region within 2 times of fault range,and the change of the principal stress and its direction are not synchronous.

关 键 词：地应力 有限元模拟 复合断层 地应力场建模 

分 类 号：TE319[石油与天然气工程—油气田开发工程]