临清拗陷东部横向变换构造分析

Analysis of transverse tectonic transfer zone in Eastern Linqing depression

临清拗陷东部自中生代以来经历多期构造运动,构造特征极为复杂,整体呈现"东西分带,南北分块"的构造格局.在对研究区地震资料进行精细解释的基础上,分析临清拗陷东部横向变换构造带的发育特征及形成原因,探讨其油气地质意义.结果表明:临清拗陷东部的横向变换构造带划分为三级,主要发育在边界断层的上盘,是造成研究区南北分块的原因;盆地基底结构先存构造、不均匀的伸展作用,以及主要断层沿走向的分段活动,控制横向变换构造带的形成;横向变换构造带的发育影响和控制油气聚集,这些区带具备良好的油气聚集条件,是有利的油气勘探目标区域.

Eastern Linqing depression has experienced several tectonic movements since the Mesozoic and tectonic characteristic is extremely complex.The east-west zonation and north-south segmentation constitute the structure framework of the whole eastern Linqing Depression.This article analyzed the characteristics and genesis of transverse tectonic transfer zone systematically and discussed its petroleum geological significance based on the accurate interpretation of seismic data in eastern Linqing Depression and the results of the former researchers.Transverse tectonic transfer zone can be divided into three levels which mainly developed in the hanging wall of boundary faults and transverse tectonic transfer zone is the reason for north-south segmentation of eastern Linqing depression.The formation of transverse tectonic transfer zone is mainly controlled by basal architecture,pre-existing basement structure,heterogeneous stretching effect and major fault segmented activity along the strike.Transverse tectonic transfer zone influences and controls the hydrocarbon accumulation and has the good accumulating conditions for petroleum.Transverse tectonic transfer zone is the favorable exploration region for petroleum.