【摘要】 四川盆地震旦系-下古生界(简称下组合)古油藏发育,储层沥青丰富,在不同层系均可见及。乐山-龙女寺加里东期沉积-剥蚀型古隆起是古油藏石油运移、充注的指向区,总体上控制了下组合储层沥青的分布。盆地及周缘震旦系曾超大规模成藏,普遍有石油聚集过程,但局部富集;下古生界古油藏则由众多分散的、小型的岩性-构造古油藏构成。古油藏原油是优质气源,而且是天然气藏的良好封堵层。油藏裂解时圈闭开放度与现今气藏成藏率成正比,同时,古油藏与现今气藏位置上的继承性更加有利于裂解气藏的保存。更多还原

【Abstract】 The paleo-oil reservoirs showing in Sinian System-Lower Paleozoic are very normal and bitumen in the paleo-oil reservoirs is very abundant.The Leshan-Longnshi paleouplift in Sichuan Basin is a favorable area where oil migrates or fills.The paleouplift mainly controls the distribution of the content and abundance of bitumen in reservoirs.In Sinian System,there is a wide range of oil accumulation,and ultra-large litho-tectonic paleo-oil reservoir formed,but enriched locally.The paleo-oil reservoir of Lower Paleozoic is composed of dispersion-like and small scale litho-tectonic paleo-oil reservoirs.The oil in the paleo-oil reservoir is the quality gas source,and bitumen belt is a good natural gas sealing layer.The trap opening degree of the gas reservoir is proportional to the rate of accumulation when the oil is cracking.And the position between the paleo-oil reservoir and present-day gas reservoir is favorable for the conservation of the oil-cracking gas reservoir.更多还原