车镇凹陷大1断层对区域油气成藏控制作用的三维数值模拟  

3D Numerical Modeling of Oil and Gas Accumulation Process Controlled by Da 1 Fault, Chezhen Depression

作　　者：戴黎明[1,2] 李三忠[1,2,3] 刘泽[1,2] 胡梦颖[1,2] 刘连启[4] 杨彦峰[4] 

机构地区：[1]中国海洋大学海洋地球科学学院,山东青岛266100 [2]海底科学与探测技术教育部重点实验室,山东青岛266100 [3]青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室,山东青岛266061 [4]中国石化胜利油田分公司河口采油厂,山东东营257200

出　　处：《大地构造与成矿学》2016年第1期47-57,共11页Geotectonica et Metallogenia

基　　金：国家自然科学基金项目(41402172;41190072;41072152);山东省自然科学基金青年基金项目(ZR2012DQ012)联合资助

摘　　要：采用有限元方法模拟了大王庄地区的应力场分布状态。根据模拟结果,对比已知油气藏的分布位置,定量分析了大1断层对区域压应力分布的控制性作用,并以此为基础探讨了区域油气运聚成藏过程的主要影响因素。模型的构建主要基于车镇凹陷大王庄地区精细三维数据体,包括三个主要地层界面及近真实的大1断层产状。据此,得出以下研究结果:(1)通过调整边界条件发现,模型在NE-SW向的伸展作用下压性应力场低值区的分布与已知油藏的分布具有较好的对应关系,均围绕大1断层呈斜对称式分布;(2)认为这种油藏斜对称式分布特征应与大1断层在区域构造应力背景下对油气的沟通、疏导作用密切相关。The stress state of the Dawangzhuang sag is modeled using finite element numerical analysis. Comparing with the position of oil deposit, we quantitatively analyze the distribution characteristics of the compressive stress controlled by the Da 1 fault, and then the main factor influencing the oil and gas accumulation process in the Dawangzhuang sag is discussed based on the simulation results. Construction of the model is mainly based on 3D seismic data in the Dawangzhuang area of Chezhen Depression, including three sequence boundaries and spatial occurrence of the Da 1 fault. The faults in the model are introduced as Coulomb-type frictional zones that refer to contact analysis of finite element modeling（FEM）. The results are as followings：（1） by adjusting the boundary condition of model, we found out that under the environment of NE-SW extension, the distribution of low compressive stress is somewhat consistent with that of oil deposits, which are skew-symmetrical distribution around the Da 1 fault;（2） We suggest that the oil distribution is closely related to the communication between source and reservoir bed controlled by the Da 1 fault in the regional tectonic stress background.

关 键 词：车镇凹陷 大1断层 构造应力场 油气成藏过程 有限元数值模拟 

分 类 号：P542[天文地球—构造地质学] TE121.2[天文地球—地质学]