泌阳断陷湖盆陡坡带陆相层序油气成藏类型及分布规律探讨

泌阳断陷湖盆陡坡带油气生、储、盖层的发育,与陆相层序中的体系域具有一定的成因联系,不同的陆相层序样式可构成不同的生、储、基层组合。综合考虑陆相层序地层特征及其生、储、盖层组合,将泌阳断陷湖盆陡坡带油气成藏类型归纳为３大类、８亚类、１０种．油气成藏类型在体系域中的分布,以水进体系域较全,其次以水退体系域和高水位体系域,低水位体系域较少．从陆相层序各体系城中成藏类型的空间展布规律来看,水进体系域是油气勘探的重要目的层段．

Play Types and Distribution Patterns in Terrigenous Sequences in Steep Slope Zone Biyang Fault-depressed Lacustrine Basin

In the steep slope zone of Biyang fault-depressed lacustrine basin, the development of source bed, reservoir and cap rock has certain genetic relationship with the systems tract in the terrigenous sequences and different combinations of source bed, reservoir and cap rock develop in terrigenous sequences of different type. Based on the stratigraphic configurations and combinations of source bed, reservoir and cap rock, the play types in the steep slope zone of Biyang fault-depressed lacustrine basin are divided into three types with eight subtypes and ten kinds. The distribution of play types in each systems tract of terrigenous sequences is unbalanced with TST being the most, RST and HST less and LST the least. TST is a significant target of exploration as viewed from the spatial distribution pattern of play types in each systems tract.