鄂尔多斯盆地安塞地区长7地层应力场模拟  

Stress Field Simulation of the Chang 7 Formation in the Ansai,Ordos Basin

作　　者：张洪军 王瑞刚 李新春 庄建 刘成林[2,3] 侯涛 许兆林 臧起彪 任浩林 杨熙雅 ZHANG Hong-jun;WANG Rui-gang;LI Xin-chun;ZHUANG Jian;LIU Cheng-lin;HOU Tao;XU Zhao-lin;ZANG Qi-biao;REN Hao-lin;YANG Xi-ya(No.1 Oil Production Plant,PetroChina Changqing Oilfield Branch,Yan'an 716000,China;State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum,Beijing 102249,China;College of Geosciences,China University of Petroleum,Beijing 102249,China)

机构地区：[1]中国石油长庆油田分公司第一采油厂,延安716000 [2]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [3]中国石油大学(北京)地球科学学院,北京102249

出　　处：《科学技术与工程》2021年第4期1342-1349,共8页Science Technology and Engineering

基　　金：国家自然科学基金面上项目(41272159)。

摘　　要：非常规资源作为新增储量的生力军在现今勘探工作中起重要的作用。非常规储层受构造作用的制约十分明显,其中构造地应力分布对油气的运移、成藏和分布有着重要的意义。为指导下一油气勘探与开发,通过应用有限元法对鄂尔多斯盆地安塞地区延长组长7层进行应力场模拟及分析研究。结果表明:安塞地区长7层差应力高值沿构造突起分布的规律明显,差应力高值区形态与成串构造突起形态一致,且在一定程度上受岩相控制;水平剪切力高值区同一沿构造突起分布,其平面分布状态在一定程度上同样受岩相的控制,水平剪切力的高值区内可能发育更多的裂缝,水平剪切力高值区内与岩心裂缝观测结果具有较好的一致。Unconventional resources have become an important backup of new-type energy at present and they are controlled closely by tectonic setting.Regional tectonic geostress determined hydrocarbon migration,accumulation,and distribution.The stress field of the Chang 7 Layer of the Yanchang Formation in the Ansai district,Ordos Basin,were simulated and analyzed by applying the finite element method to guide the oil and gas exploration in the basin.The results show that the distribution of high differential stress values was along tectonic protrusions in the Chang 7 Layer.The patterns of a series of structural protrusions are consistent largely to the lithofacies.The area of high horizontal shear stress agrees well to the structural protrusions,and the planar distribution of the shear stress is controlled by lithofacies to a certain extent,thus more fractures may develop in the areas of high shear stress.The distribution of high horizontal shear stress was well reflected by the fractures that observed in the cores.

关 键 词：有限元 应力场模拟 延长组 鄂尔多斯盆地 

分 类 号：TE122.2[石油与天然气工程—油气勘探]