资福寺洼陷形成机理与生油潜力研究

资福寺洼陷是受南部斜坡和范家台基底隆升形成的早期洼陷,其主要形成时间为白垩—下第三系沙市组沉积期。洼陷内暗色泥岩发育,有机质丰度较高,干酪根类型较好,处于成熟演化阶段,具有较好的生油物质基础。在原油和生油岩中烃类族组分、烷烃和生物标志物之间均有较好的亲缘关系,表明资福寺洼陷具有较好的生油条件和生油潜力。资福寺洼陷周缘范家台构造、金家场构造经钻井试油已获少量油流,因此是江陵凹陷今后油气勘探的有利地区。

Research on the forming mechanisms and oil sources potentiality in Zifusi Low-lying Area

Because the south slope and Fanjiatai structure basement has risen,Zifusi Low-lying Area is formed in Shashi formation sedimentary periods of Cretaceous-Palaeogene. In Low-lying Area,dark-colored mudstones have been developed,the organic matter richness are increased,the kerogen type is better and in matural stage,so it has better oil source bases. The hydrocarbon groups,alkane hydrocarbons and biological markers in the crude oils and the oil source rocks have closed relationships,which has shown that Zifusi Lw-lying Area has a better oil source condition and oil source potentiality. Around the Zifusi Low-lying Area,the Fanjiatai Structure and Jinjiachang Structure have gained some oil streams through drilling well and production test,therefore,this area would be the oil and gas exploration favorable area in Jiangling Depression in the future.