摘要
基于地震、钻井及测井等资料,结合油气勘探实践,开展松辽盆地北部白垩系青山口组油气有序分布特征、有序分布成因以及差异富集模式研究。研究表明:(1)松辽盆地北部青山口组常规—非常规油气有序共生,平面上,自盆地边缘向中心常规油、致密油、页岩油有序成藏;垂向上,自下向上依次发育页岩油、致密油、常规油;(2)构造-沉积耦合通过控制沉积相带的分异和成岩作用,影响储层的岩性和物性变化,进而控制着常规—非常规油气空间有序分布;(3)烃源岩生烃演化、断层启闭性和储层致密化的耦合,控制了青山口组常规—非常规油气的有序共生格局;(4)储层物性的有序变化控制形成不同油气类型的动力场,进而控制着油气的有序聚集;(5)不同类型油气富集主控因素存在差异,源上常规油气成藏的主控因素为浮力驱动、断裂连通、砂体输导,圈闭富集;近源致密油气富集的主控因素为超压驱动、断裂连通、砂体多层叠置,油气准连续分布;源内页岩油富集的主控因素为原生源储、自封闭作用控制,油气原地保存或生烃增压驱动下微运移聚集。勘探实践表明,研究成果可以有效指导松辽盆地北部青山口组常规—非常规油气资源的整体部署与立体勘探。
Based on the petroleum exploration in the Cretaceous Qingshankou Formation,northern Songliao Basin,NE China,integrated with seismic,drilling and logging data,this study investigates the characteristics and genetic mechanisms of orderly distribution and the differential enrichment patterns of conventional and unconventional hydrocarbons in the formation.Key findings involve five aspects.First,the conventional and unconventional hydrocarbons coexist orderly.Laterally,conventional oil,tight oil,and shale oil form a pattern of orderly accumulation from basin margins to the center.Vertically,shale oil,tight oil,and conventional oil develop progressively upward.Second,the coupled tectonic-sedimentary processes govern sedimentary facies differentiation and diagenesis,influencing reservoir physical properties and lithology,thereby controlling the orderly distribution of conventional and unconventional hydrocarbons in space.Third,the coupling of source rock hydrocarbon generation evolution,fault sealing capacity,and reservoir densification determines the orderly coexistence pattern of conventional and unconventional hydrocarbons.Fourth,sequential variations in reservoir physical properties generate distinct dynamic fields that regulate hydrocarbon orderly accumulation.Fifth,enrichment controls are different depending on hydrocarbon types:buoyancy-driven,fault-transport,sandbody-connected,and trap-concentrated,for above-source conventional oil;overpressure-driven,fault-transport,multi-stacked sandbodies,and quasi-continuous distribution for near-source tight oil and gas;self-sourced reservoirs,retention through self-sealing,in-situ accumulation or micro-migration driven by hydrocarbon-generation overpressure for inner-source shale oil.From exploration practices,these findings will effectively guide the integrated deployment and three-dimensional exploration of conventional and unconventional hydrocarbon resources in the Qingshankou Formation,northern Songliao Basin.
作者
白雪峰
李军辉
郑强
陈方举
BAI Xuefeng;LI Junhui;ZHENG Qiang;CHEN Fangju(State Key Laboratory of Continental Shale Oil,Daqing 163712,China;CNPC Daqing Oilfield Company Limited,Daqing 163458,China;Exploration and Development Research Institute,CNPC Daqing Oilfield Company Limited,Daqing 163712,China)
出处
《石油勘探与开发》
北大核心
2025年第5期1007-1016,共10页
Petroleum Exploration and Development
基金
中国石油天然气股份有限公司科技重大专项“陆相页岩油规模增储上产与勘探开发技术研究”(2023ZZ15)。
关键词
松辽盆地
白垩系青山口组
常规油藏
致密油
页岩油
有序分布
差异富集
Songliao Basin
Cretaceous Qingshankou Formation
conventional oil reservoir
tight oil
shale oil
orderly distribution
differential enrichment
