桩海地区的走滑和挤压构造特征

桩海地区是沾化凹陷和黄河口凹陷的结合部，特殊的构造位置造就了该区复杂的构造特征。在济阳坳陷拉张构造模式的基础上，着重研究了桩海地区的走滑和挤压构造特征。该区印支期以宽缓的褶皱为主要特征；燕山期发育大型走滑构造，伴有挤压构造；喜马拉雅期以拉张和走滑构造为主，局部有挤压特征。挤压和剪压构造运动主要形成圈闭且改造储层物性；分割正负构造带的走滑断层控制圈闭的形成，连通油源，是油气运聚的通道，对于油气藏的形成具有控制作用。

Characters of strike-slip and extrusion structure in Zhuanghai region

Zhuanghai region is the joint of Zhanhua Sag and Yellow River mouth sag. There were complicated structural characters for its special structural position. The characters of strike - slip and extrusion structure in the Zhuanghai region were emphatically studied on the tensile structure model in the Jiyang Depression. Primary character was broad and gentle fold in Indo -Chinese epoch of the region. Large - scale strike - slip structure was developed to follow the extrusion structure in Yans-han epoch. Tensile structure and strike - slip structure were the most, and extrusion character locally appeared in Himalayan epoch. Extrusion and shear stress structural movements mainly formed traps and changed the reservoir physical properties. The strike - slip fault, which had cut the positive and negative structural belt, controlled the trap formation and connected the oil source. It was the passageway of the oil and gas migration, which control the oil - gas reservoir forming.