树25区块有限元三维地应力场分布规律  

THE DISTRIBUTION LAWS OF 3-D EARTH STRESS FIELD OF BLOCK SHU-25 BY FINITE ELEMENT METHOD

作　　者：王群嶷[1,2] 张学婧[2] 王运涛[2] 张晓东[3] 

机构地区：[1]中国地质大学,北京100083 [2]大庆油田有限责任公司采油工程研究院,黑龙江大庆163453 [3]大庆油田有限责任公司井下作业分公司,黑龙江大庆163453

出　　处：《大庆石油地质与开发》2010年第6期134-139,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：基金项目：“十五”国家科技攻关计划“低渗透油田增产改造关键技术研究”（2003BA613A-07-05）资助.

摘　　要：以岩石力学实验和地应力岩心测量为基础，利用三维地应力场有限元约束优化反演技术，对松辽盆地三肇凹陷树25区块的地应力场进行综合研究，得出该区块地应力分布规律。模拟结果表明，断层可对应力传递产生影响，导致地应力的大小和方向发生较大变化，地应力低值区分布在断层内及其附近区域，地应力高值区分布于断层端部的局部区域，树25区块断层附近应力方向偏离区域方向10°-20°。模拟结果对该区裂缝分布情况、压裂改造方案制定、注水井网布置有重要的指导作用。Based on rock mechanical experiment and core earth stress test, using the inverting technique by the constraint and optimization of the finite element of 3 D earth stress field, the comprehensive study of the earth stress is conducted to obtain the earth stress distribution laws in Block Shu-25 of Sanzhao Sag of Songliao Basin. The analogy results show that the faults can affect stress transmitting and lead to the great changes in size and direction of the stress ; low stress part lies in and nearby the faults, and high stress part distributes in local part of the fault butts, and the deviant stress orientation nearby the faults are 10 to 20 degrees from the regional orientation. This simulating result can greatly guide the fracture distribution realization, fracturing plan compilation and water injector pattern arrangement.

关 键 词：有限元法反演 三维地应力场 扶余油层 应力分布规律 

分 类 号：TE319[石油与天然气工程—油气田开发工程]