四川盆地震旦系-下古生界古油藏特征  

Primary study on characteristics of paleo-oil reservoirs of Sinian System-Lower Paleozoic in Sichuan Basin,China

作　　者：黄文明[1] 刘树根[1] 马文辛[1] 张长俊[1] 魏全超[2] 宋光永[1] 曾祥亮[1] 

机构地区：[1]＂油气藏地质及开发工程＂国家重点实验室(成都理工大学),成都610059 [2]中国石化勘探南方分公司,成都610041

出　　处：《成都理工大学学报（自然科学版）》2010年第6期638-645,共8页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家重点基础研究发展计划“973”项目(2005CB422106);中国石化海相前瞻性项目(PH08001)

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。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-Longnshi 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.

关 键 词：四川盆地 震旦系 下古生界 古油藏 裂解气藏 

分 类 号：TE122.1[石油与天然气工程—油气勘探]