新疆石油地质

›› 2015, Vol. 36 ›› Issue (6): 1-1.doi: 10.7657/XJPG20150603

• 论文 •    

玛湖凹陷百口泉组低渗砂砾岩油气藏成藏条件及富集规律

雷德文，瞿建华，安志渊，尤新才，吴 涛   

  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)
  • 出版日期:2019-01-01 发布日期:1905-07-16

Hydrocarbon Accumulation Conditions and Enrichment Regularity of Low-Permeability Glutenite Reservoirs of Baikouquan Formation in Mahu Sag, Junggar Basin

LEI Dewen, QU Jianhua, AN Zhiyuan, YOU Xincai, WU Tao   

  1. (Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China)
  • Online:2019-01-01 Published:1905-07-16

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摘要： 低渗砂砾岩油气藏是准噶尔盆地油气勘探的主要领域，目前玛湖凹陷西斜坡已发现并落实5个下三叠统百口泉组油藏。综合分析认为，玛湖凹陷西斜坡具备油气成藏的4大有利条件：二叠系多套高质量烃源岩持续供烃；低渗背景下发育储集层“甜点区”；深大断裂与不整合面构成高效输导体系；区域性盖层发育。玛湖凹陷西斜坡百口泉组发育扇三角洲前缘有利相带，储集层物性较好，存在多期烃类充注，晚期高成熟油气保存条件较好，油质较轻并含气是油气富集的主要原因。

Abstract: Low-permeability glutenite reservoirs of Baikouquan formation are the major targets for petroleum exploration in Junggar basin.Five reservoirs of the Triassic Baikouquan formation have been found and proved in west slope zone of Mahu sag in the basin. The comprehensive study suggests that the west slope zone is of four favorable conditions for hydrocarbon accumulation: several sets of high-quality source rocks of the Permian continuously provide hydrocarbon for the reservoir; dessert spots occur in the low permeability reservoirs; high efficient transport systems are shaped by deep faults and unconformities, and the regional cap rocks are developed here. Also, the fan delta frontal facies belts distributed in this area have better reservoir property, there exist multistage hydrocarbon charging and good preservation conditions for late highly matured hydrocarbons, and the oil is lighter and contains natural gas, all of which could be the main reasons for its hydrocarbon enrichment

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