东濮及邻区上古生界天然气成藏条件分析

东濮及邻区包括南华北盆地、鲁西隆起、渤海湾盆地三大构造单元的各一部分,上古生界为一套海相-海陆过渡相-陆相的含煤地层,具有较好的生、储、盖条件。通过对圈闭类型、形成时间、埋藏史、成烃史及其配置关系的分析,认为东濮凹陷、中牟凹陷具有最好的成藏条件;莘县凹陷、冠县凹陷具有一定的成藏条件;济源凹陷、丘县等凹陷等成藏条件较差。

Analysis of the gas reservoir forming conditions in the upper Palaeozoic of Dongpu and its adjacent areas

Dongpu and its adjacent areas include parts of the southern North China basin, Luxi uplift and Bohai Bay basin. The upper Paleozoic was a set of coal-bearing formations with marine facies-transitional facies ( marine-terrestrial facies ) -terrestrial facies, and had good conditions of source, reservoirs and cap rocks. Based on the analyses of the types and formation time, burial history, hydrocarbon forming history and their disposition relation of the traps, it is considered that Dongpu sag and Zhongmu sag had the best reservoir forming conditions, that Shenxian sag and Guanxian sag had certain reservoir forming conditions, and that Jiyuan sag and Qiuxian sag had poor reservoir forming conditions.