周口坳陷石炭-二叠纪残留盆地煤成油气勘探前景

从烃源岩资源潜力及其油气成藏控制因素等方面入手，全面探讨了周口坳陷石炭-二叠系的煤成烃勘探前景。研究表明，煤系是石炭-二叠纪残存盆地中最主要的烃源岩，其厚度大，类型较好，生烃潜力大，存在多期生烃过程，其中，印支和喜马拉雅运动期是最重要的埋藏生烃期；圈闭类型主要包括沉积圈闭和断褶构造圈闭两类，圈闭形成期与油气运聚期配置较好；油气成藏控制因素主要包括有效烃源岩分布、输导体系的输导能力、构造定型期与油气运聚期的有效配置和古近纪构造格局等；可能存在自生自储、下生上储和古潜山型3 种油气聚集类型。

Prospects for Coal-Formed Oil and Gas Exploration of Carboniferous-Permian Residual Basins in Zhoukou Depression

This paper completely studies the prospects and directions for coal-formed hydrocarbons exploration of the Carboniferous- Permian in Zhoukou depression in the south of the North China basin. This study indicates that the coal measures are the most important source rocks within residual basins of the Carboniferous-Permian, with big thickness, good types and large potentials of hydrocarbon generation as well as multi-stage hydrocarbon-generation processes in which Indo-Chinese epoch and Himalayan epoch are the major periods of hydrocarbon generation. The trap types occur in form of sedimentary trap and fault-fold structural trap, and in good assemblage with hydrocarbon migration and accumulation. The control factors for hydrocarbon accumulation include effective source rock distribution, transporting system capability, effective assemblage between structure-shaping stage and hydrocarbon migration-accumulation stage and Paleogene structural framework. Also, it is recognized that the hydrocarbon accumulation type in this residual basin could probably be divided into self-generation and self-accumulation one, lower-generation and upper-accumulation one and buried hill one.