沉积学报2025，Vol.43Issue(3)：1130-1144,15.DOI:10.14027/j.issn.1000-0550.2023.068
成藏动力对页岩油气聚集的影响
Influence of Reservoir Forming Dynamics on Shale Oil and Gas Accumulation:A case study from the Lucaogou Formation in Jimusar Sag,Junggar Basin
摘要
Abstract
[Objective]The pressure differences between source and reservoir rocks is not only the driving force for unconventional oil and gas accumulation,but also indispensable key content in the study of the genesis of shale oil sweet spots.In addition,laminar structures are widely developed in continental shale,and the degree of development results in differences in the accumulation dynamics of reservoir rocks,which affect the accumulation of shale oil and gas.However,there are relatively few studies on the accumulation dynamics of shale oil.The sweet spot section of the Permian Lucaogou Formation in the Jimusar Sag was taken as the research object,and the intrinsic relationship be-tween the development degree of laminar structure and shale oil and gas accumulation was revealed from the perspec-tive of accumulation dynamics.[Methods]Through the evaluation of source rocks,classification of petrographic types and characterization of pores,etc.,the characteristics of the source rocks,different types of reservoir rocks,and source-reservoir assemblages in the study area were obtained.Using the equivalent depth method and fluid inclu-sion simulation,the pressure difference between source and reservoir rocks during the accumulation period was recov-ered,and the accumulation dynamics of different types of reservoir rocks were obtained.[Results]The results show that the study area is dominated by source-reservoir interbedded combinations,and the hydrocarbon generation of high-quality source rocks creates a strong source-reservoir pressure difference between the source and reservoir,pro-moting the continuous migration of oil and gas to adjacent reservoir spaces.Interbedded silty and argillaceous laminae are widely developed in the reservoir rocks,which constitute a large area of frequent contact between the source and reservoir.The degree of development results in differences in the accumulation dynamics of different types of reservoir rocks,the laminar reservoir has developed laminar structure,and the migration distance of oil and gas is shortened;thus,it has stronger accumulation power and oil-bearing properties.[Conclusions]The interaction between the pres-sure difference between source and reservoir rocks and the laminar structure causes the difference in the accumula-tion effect of oil and gas in the reservoir rocks,and the development of laminar reservoir rocks in the lower sweet spot is a favorable area for studying oil and gas migration and accumulation in the shale sweet spot.关键词
芦草沟组/成藏动力/纹层结构/甜点/储集空间Key words
Lucaogou Formation/accumulation dynamics/laminar structure/sweet spot/reservoir space分类
天文与地球科学引用本文复制引用
林一鹏,韩登林,邓远,苏奥,秦鹏,马斌玉,蒋兴超,王镜敏..成藏动力对页岩油气聚集的影响[J].沉积学报,2025,43(3):1130-1144,15.基金项目
国家自然科学基金项目(42072121,42302175)[National Natural Science Foundation of China,No.42072121,42302175] （42072121,42302175）
