论文部分内容阅读
在对上古生界热演化史恢复的基础上,应用EASY%Ro数值模拟方法,结合构造演化及埋藏史特征,对东濮凹陷上古生界有机质成熟度演化与油气成藏进行了综合研究。研究表明上古生界有机质成熟度呈“阶梯式”演化。第一阶梯出现在海西—印支期;第二阶梯为相对平静期,主要发育于燕山期;第三阶梯为喜山期,是石炭二叠系发生二次成熟演化的主要阶段。有机质成熟史与成藏期次分析表明与油气成藏相关的生烃期次有两期。一次生烃期,主要发生在220~240Ma之间,形成原生油气藏的可能性较小;二次生烃期晚,发生在35~20Ma之间,以气态烃为主,是形成煤成气藏的主要时期。
Based on the restoration of the thermal evolution history in the Upper Paleozoic, the evolution of organic matter and the hydrocarbon accumulation in the Upper Paleozoic in Dongpu Depression are studied by EASY% Ro numerical simulation and the tectonic evolution and burial history. Research shows that the maturity of organic matter in the Upper Paleozoic shows a “stepwise” evolution. The first step appears in the Hercynian-Indosinian period. The second step is a relatively quiet period, mainly developed in the Yanshanian period. The third step is the Himalayan period, which is the main stage of the second maturity evolution of the Permian Permian. Mature history and period analysis of organic matter show that there are two periods of hydrocarbon generation related to hydrocarbon accumulation. The first hydrocarbon generation period occurs mainly between 220 and 240 Ma, which is less likely to form a primary oil and gas pool. Late secondary hydrocarbon generation occurs between 35 and 20 Ma, with gaseous hydrocarbons being dominant and forming coal-based gas The main period of possession.