新疆石油地质

›› 2015, Vol. 36 ›› Issue (4): 1-1.doi: 10.7657/XJPG20150401

• 论文 •    

准噶尔盆地玛湖凹陷高成熟油气成因与分布

阿布力米提1，曹 剑2，陈 静1，杨海波1，陈刚强1，陶柯宇2   

  1. (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)
  • 出版日期:2019-01-01 发布日期:1905-07-14

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

Abulimiti1, CAO Jian2, CHEN Jing1, YANG Haibo1, CHEN Gangqiang1, TAO Keyu2   

  1. (1. Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang834000, China;2.School of Earth Sciences and Engineering, Nanjing University, Nanjing, Jiangsu210023, China)
  • Online:2019-01-01 Published:1905-07-14

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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。

Abstract: 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, northwestern Junggar basin. Results show that the highly matured and light oil and gas in the study area are characterized by low density, high maturity and coexistence with natural gas, which belong to the products of multi?set source rocks dominated by the Lower Permian Fengcheng high?quality source rock under nearly?high maturation stage. During the hydrocarbon generation, migration and accumulation, the highly matured and light oil and gas reservoir got continuous oil?gas charging and good preservation without or with little biodegradation; the occurrence of them is characterized by source controlling, and they can migrate and accumulate in cross?zone and broad areas vertically by faults and fractures, which might be important conditions for forming Mahu giant petroleum province in Junggar basin

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