西湖凹陷平北地区断裂特征及控沉、控圈分析

Fault Characteristics and Analysis of Controlling Factors on Sedimentation and Trap Formation in Pingbei Area of Xihu Depression

平北地区作为西湖凹陷西侧的典型斜坡,工区内断裂发育,以致构造特征复杂,断裂特征研究对沉积体系分析及油气成藏解剖具有重要的影响。该文在构造精细解释基础上,开展平北地区断裂系统研究,分析断裂成因机制及其构造演化特征,归纳构造样式及构造圈闭特征,分区分析平北地区断裂演化对沉积、圈闭的控制作用。为下一步开展沉积体系、控砂机制、成藏特征及主控因素研究夯实基础,以便更好满足生产需求。

The Pingbei area is a typical slope on the west side of Xihu Sag.The structure in work area is complicated because abundant faults are developed.It is necessary to study the characteristics of the faults because they play an important part in the analysis of sedimentary system and the research of oil and gas accumulation.On the basis of fine tectonic interpretation,this paper conducted the following steps to study the fault system in Pingbei area:analyzed the genetic mechanism of the faults and their tectonic evolution characteristics;summarized the tectonic style and the characteristics of structural traps;analyzed the effect of fault evolution on sediments and traps in Pingbei area.It lays a solid foundation for the next step to carry out research on sedimentary system,sand control mechanism,accumulation characteristics and main control factors,so as to better meet production needs.