准噶尔盆地腹部中浅层远源、次生油气藏成藏过程及主控因素  

Accumulation Process and Control Factors of Jurassic-Cretaceous DistantSource and Secondary-Filled Reservoirs in the Hinterland of Junggar Basin

作　　者：麻伟娇 卫延召[2] 李霞[3] 陶士振[2] 李勇广[3] 赵铮亚[3] MA Weijiao;WEI Yanzhao;LI Xia;TAO Shizhen;LI Yongguang;ZHAO Zhengya(School of Earth and Space Sciences,Peking University,Beijing 100871;Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083;Xinjiang Oilfield Company,PetroChina,Karamay 834000)

机构地区：[1]北京大学地球与空间科学学院,北京100871 [2]中国石油勘探开发研究院,北京100083 [3]中国石油新疆油田分公司,克拉玛依834000

出　　处：《北京大学学报（自然科学版）》2018年第6期1195-1204,共10页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家科技重大专项(2011ZX05001);中国石油天然气股份有限公司油气勘探重大科技项目(2016B-0301)资助

摘　　要：通过分析准噶尔盆地腹部中浅层侏罗-白垩系油气储集层中烃类包裹体的均一温度、地层埋藏史-热演化史、成藏期构造、已知油藏和地球化学运移指标,探讨油气成藏期次、有效输导体系、运聚过程和圈闭遮挡条件,进一步揭示腹部地区中浅层远源、次生油气藏的动态成藏过程。结果表明,侏罗-白垩系存在两期成藏,分别为白垩纪形成的原生油气藏和古近纪末至今形成的次生油气藏,两类油气藏在腹部地区均广泛分布。断裂-砂体-区域不整合面对远源、次生油气藏的动态运聚起着立体输导作用。原生油气藏的形成受成藏期古构造的影响,后期的古构造变形使得原生油气藏发生破坏调整,油气向北运移,遇到遮挡形成次生油气藏。油气在运移路径上的遮挡条件决定着油气藏类型,目前在腹部地区发现的油气藏主要为平缓背斜油气藏、断块油气藏和岩性地层油气藏。Homogenization temperature of fluid inclusions,stratigraphic burial-thermal history,paeleostructure of accumulation period,known reservoirs and geochemical index are analyzed.Hydrocarbon accumulation periods,hydrocarbon transport system,trap-forming conditions of the Jurassic-Cretaceous in the hinterland of Junggar Basin are discussed.Thus,the dynamic accumulation process of the distant sourced,secondary-accumulated reservoirs is revealed.Results show that there are two periods of oil and gas charging in the Jurassic and cretaceous reservoirs in the hinterland of Junggar Basin,which are primary reservoirs formed in the early Cretaceous and secondary-filled reservoirs formed in the late paleogene till now.Both the primary reservoirs and sencondary accumulated reservoirs are widely spread in the hinterland area.Faults-sand bodies-unconformities act as three dimensional transporting systems for hydrocarbon migration and accumulation.The formation of primary reservoirs is controlled by paleostructure of accumulation period.During the later dissolution of paleostructure,primary reservoirs are destroyed and oil and gas migrate towards the north.Reservoirs types are decided by trap conditions on the migration pathways.At present,low-amplitude anticline,fault block and litho-stratigraphic reservoirs are the most discovered.

关 键 词：准噶尔盆地腹部 远源、次生油气藏 成藏期次 运聚规律 主控因素 

分 类 号：P618[天文地球—矿床学]