【作者】 孙杰；

【导师】 季汉成； 林娟华；

【作者基本信息】 中国石油大学（北京） ， 地质工程（专业学位）， 2017， 硕士

【摘要】 本论文通过油气源对比、油气成藏期次研究,以及运用TemisFlow软件进行盆地模拟,对中扬子下组合典型油气藏进行解剖。研究结果表明:下寒武统、下志留统两套泥质岩是中扬子地区下组合的主要供烃层系,泥盆—二叠纪为中扬子地区下古生界烃源岩的主生油期,生烃时间可持续至侏罗纪,且志留系烃源岩以侏罗纪为主供烃期,有利于晚期成藏;鄂西渝东—湘鄂西地区燕山期以来经历了三段式抬升冷却,晚侏罗世以来的剥蚀幅度,自西北向东南呈现不断增强的趋势,燕山-喜山期的构造改造程度决定了埋藏条件下保存条件的有效性;鄂西渝东区位于古隆起高部位,有利于油气运聚,鄂西渝东地区生烃演化时间较晚,志留系烃源岩至今仍保持较好的生烃状态,燕山期以来鄂西渝东地区抬升晚且程度低,封盖条件受影响较小,因此鄂西渝东区至今还是页岩气的有利勘探区。更多还原

【Abstract】 Petroleum reservoir of lower assemblage in middle Yangtze are analyzed by correlation of petroleum source,study on hydrocarbon accumulation period and basin modeling.The results show that the Lower Cambrian mudstone and the Lower Silurian mudstone are the main hydrocarbon supplying stratas of Lower Assemblage in Middle Yangtze The time that Paleozoic source rock generated oil is mainly during Devonian to Permian period and till Jurassic.Jurassic is also the major period that Silurian source rock supplied hydrocarbon.This benefits late hydrocarbon accumulation.There has been three-stage uplift-cooling in western Hubei and eastern Hunan since Yanshan period.Denudation extent enhance constantly from northwest to southeast.The degree of tectonics in Yanshan-Xishan period controlles the effectiveness of preservation condition.Western Hubei and estern Hunan is on the higher position of palaeohigh.This is good for oil and gas migration and accumulation.The time of hydrocarbon generation and evolution in western Hubei and eastern Hunan is later.Silurian hydrocarbon source rock keep good hydrocarbon-generation condition.Western Hubei and eastern Hunan area uplifts late with lower degree.Sealing condition is influced slightly.Therefore,western Hubei and eastern Hunan area is the favorable exploration zone of shale gas.更多还原