金湖凹陷西斜坡崔庄变换带研究

 变换带是构造变形区调节构造平衡的重要地质构造。金湖凹陷西斜坡存在崔庄变换带,为了研究崔庄变换带的地质特征及其与油气藏的关系,分析了西斜坡构造演化历史、断层生长特征及沉积相分布规律,在此基础上,研究了变换带的构造分区、沉积分区作用及其与油气藏的对应关系。结果表明,金湖凹陷西斜坡崔庄变换带是控制阜宁组油气藏的重要因素,古近纪阜宁期是崔庄变换带发育的主要时期,变换带是凹陷侧向物源的入口,控制砂体的展布方向,并且是西斜坡南北分区的界限,变换带两侧构造、沉积存在很大差异。变换带的砂体连通性好,是有利的油气聚集区带,崔庄变换带兼具油气运移和储集的双重作用。

Study of the Transfer Zone in Cuizhuang Area of the West Slope of Jinhu Sag

Tectonic transfer zone is an important component of the extensional tectonic system to balance deformation. Cuizhuang Transfer Zone is located in the middle of the western slope of Jinhu Sag. This paper studies the geological characteristics of Cuizhuang Transfer Zone, the relationship between it and hydrocarbon reservoirs and its division effect based on the analysis of the tectonic evolution history of the west slope, the distribution of faults and the sedimentary facies. It is shown that Cuizhuang Transfer Zone influences the provenances, the deposition of sand and the distribution of hydrocarbon reservoirs. It is the entrance of the lateral provenance and controls the distribution of the sand body. It is the boundary between the north and the south, where the structures and the sedimentary conditions are different. The sand in the transfer zone enjoys a good porosity and permeability. The transfer zone is a favorable zone for the accumulation of oil and gas. The transfer zone in the western slope acts as oil and gas reservoirs and the channel for oil and gas migrations. Cuizhuang Transfer Zone is one of the important factors to control hydrocarbon reservoirs of Funing Group in the western slope.