准噶尔盆地玛湖凹陷高成熟油气成因与分布  

Origin and Occurrence of Highly Matured Oil and Gas in Mahu Sag, Junggar Basin

作　　者：阿布力米提[1] 曹剑[2] 陈静[1] 杨海波[1] 陈刚强[1] 陶柯宇 

机构地区：[1]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000 [2]南京大学地球科学与工程学院,南京210023

出　　处：《新疆石油地质》2015年第4期379-384,共6页Xinjiang Petroleum Geology

基　　金：中石油科技重大专项(2012E-34-01)

摘　　要：致密储集层中的油气是否高熟轻质,对于油气的富集与高产至关重要。对准噶尔盆地玛湖凹陷高熟轻质油气的基本特征、成因与分布规律的研究结果表明,研究区高熟轻质油气具有原油密度较轻、成熟度较高、与天然气共生等特征,属于以下二叠统风城组优质烃源岩为主的多套烃源岩接近高成熟演化阶段的产物。在成藏过程中,高熟轻质油气藏的油气连续充注、保存好,未受降解破坏;高成熟油气的分布具有"源控"特征,垂向上因断裂沟通可以跨层运聚,分布区域广,是玛湖大油气区得以形成的重要条件。Whether the oil and gas are highly matured and light is critical to hydrocarbon enrichment and high yield in dense reservoirs.This paper investigates the basic characteristics, origin and occurrence rules of highly matured and light oil and gas in Mahu sag, northwest-ern Junggar basin. Results show that the highly matured and light oil and gas in the study area are characterized by low density, high matu-rity and coexistence with natural gas, which belong to the products of multi-set source rocks dominated by the Lower Permian Fengchenghigh-quality source rock under nearly-high maturation stage. During the hydrocarbon generation, migration and accumulation, the highlymatured and light oil and gas reservoir got continuous oil-gas charging and good preservation without or with little biodegradation; the occur-rence of them is characterized by source controlling, and they can migrate and accumulate in cross-zone and broad areas vertically by faultsand fractures, which might be important conditions for forming Mahu giant petroleum province in Junggar basin.

关 键 词：准噶尔盆地 玛湖凹陷 百口泉组 风城组 优质烃源岩 连续型油气藏 高成熟油气 轻质油 

分 类 号：TE112.422[石油与天然气工程—油气勘探]