海安凹陷南部断裂活动对油气运聚作用的探讨

Discussions on Oil-gas Accumulation by Fracture Movement in South Haian Depression

海安凹陷断裂较发育 ,断裂形成、活动的时期不同 ,对构造圈闭、油气侧向及纵向上运移起控制作用。断裂活动与烃源岩生、排烃期的时空配置关系是构造捕获油气并成为有利圈闭的重要因素之一。深入研究断裂的性质与特征 ,确定油气运聚的主要部位 ,可大大提高该区的勘探效率。

The fractures are comparatively developed in Haian depression. They formed and were active in varied periods, controlling the trap of structures, the lateral and longitudinal migration of oil-gas. The relationship between the fracture movement and the spatio-temporal distribution of hydro-carbon source rocks in their hydro-producing and-discharging periods is one of the important factors for the structures in trapping oil and gas and turning into favorable traps. It is concluded that a profound research into the properties and characteristics of the fractures and the determination of the major oil-gas migration and accumulation portions will make the exploration rate a big improvement.