准噶尔盆地车排子凸起带轻质油成藏机制  

Accumulation mechanism of light oils in Chepaizi uplift belt of Junggar Basin

作　　者：刘洪军[1,2] 张枝焕[1] 秦黎明[3] 朱雷[1] 席伟军[1] 

机构地区：[1]中国石油大学油气资源与探测国家重点实验室,北京102249 [2]西安石油大学油气资源学院,陕西西安710065 [3]中国石化石油工程技术研究院,北京100101

出　　处：《中国石油大学学报（自然科学版）》2011年第4期34-40,共7页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家重点基础研究发展计划'973'课题(2006CB202303);国家科技'十一五'重大专项课题(2008ZX05002-006)

摘　　要：根据油气地球化学和油气成藏地质学等相关理论,利用车排子凸起带轻质油的地球化学、同位素、流体包裹体和烃源岩的热演化史等资料,对该地区轻质油成藏机制进行研究。结果表明:车排子凸起带轻质油主要源自四棵树凹陷侏罗系烃源岩,白垩系烃源岩有部分贡献;侏罗系烃源岩在新近纪中后期达到生烃高峰,其生成的原油主要沿不整合面或断层运移至白垩系底部或第三系沙湾组储集层中聚集形成背斜型或岩性油气藏,部分油藏混有白垩系低成熟原油;轻质油成藏过程中,储层沉积速率大,充注和供烃效率较高,运移过程中散失量小,这些是其能快速成藏的重要原因。According to the oil-gas geochemistry and hydrocarbon accumulation geology theory,the light oil accumulation mechanism of Chepaizi uplift belt was studied by using data of geochemical,isotopes,fluid inclusions of light oil and the thermal evolution of source rocks.The results show that the light oils of the area mainly come from Jurassic source rocks of Sikeshu sag,some of which are from Cretaceous source rocks.In the mid-late Neogene period,the Jurassic source rocks are in hydrocarbon-generating peak.And the formed crude oil migrates to the bottom of the Cretaceous or Shawan formation of the Tertiary reservoirs along unconformity or faults and accumulates to form anticlinal or lithologic reservoirs.Some reservoirs mix with Cretaceous low mature oil.In the light oil formation,reservoir sedimentary rate is large,and hydrocarbon charging and expulsion efficiency are all high,and the dissipation amount is small,all of these factors are important reasons for rapid accumulation.

关 键 词：准噶尔盆地 地球化学 成藏机制 轻质油 车排子凸起带 

分 类 号：TE122.1[石油与天然气工程—油气勘探]