辽河西部凹陷陈家反转断层构造特征与油气的关系

The Chenjia Inverted Fault in the Western Liaohe Depression and Its Relations with Hydrocarbon

陈家断层位于渤海湾盆地辽河盆地西部凹陷中部,是西部凹陷的控制断层台安—大洼断裂的一条分支断层。由于地表、地下构造变形的复杂性及可靠的地震反射资料相对较少,无法判断其深部勘探潜力。在分析区域地质背景基础上,结合高分辨率三维地震及测井、钻井等资料,从地震剖面、生长地层等该断层的几何特征进行剖析,运用平衡剖面技术方法验证了该断层的运动学特征。研究结果表明陈家断层为两期叠加的反转构造,经历了E2s3下～E2s3中期挤压,E2s3中～E2s1+2期拉张,E2s1+2～N1g期挤压的过程,产生的断层封堵使得下盘成为有利的油气勘探区。

The Chenjia fault is located in the middle part of the western Liaohe depression in Bohaiwan basin. It is a branch of the Taian-Dawa fault which is a major fault of western depression. In the thesis, the Chenjia fault is considered to be a two-step inverted fault based on the analysis of regional geological surveying in combination with the high resolution three-dimensional seismic data, well data, seismic profile and so on. The Chengjia fault experienced the compression in E2s3L- E2s3M , the extension in E2sTM - E2sTM , and compression in E2STM - N1g. It is beneficial to the generation, migration, and accumulation ofoil and gas.