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优质储层成因已成为制约中深层油气高效勘探开发的关键问题.综合利用钻井岩心、测录井、三维地震等资料,通过岩心观察、薄片鉴定、分析测试等技术方法,对渤南洼陷沙四下亚段扇三角洲前缘优质储层成因进行研究.研究表明:沉积相带原始物性好坏、成岩作用类型及强弱差异、地层超压强弱及发生时间、油气充注强弱及发生时间、断层/不整合对流体的输导以及膏盐层的作用是控制沙四下亚段储层物性的主要因素.优质储层发育是特定“源-流-汇”成岩系统综合作用的结果,有利沉积条件是优质储层发育的基础;储层与烃源岩之间的有利通道(断裂、不整合、相对高孔渗储层)是优质储层发育的前提;储集层与烃源岩较短的运移路径是优质储层发育的关键;充足的流体来源、油气充注、地层超压是优质储层发育的保证.
The formation of high-quality reservoirs has become a key problem that restricts the exploration and development of mid-deep oil and gas.A comprehensive utilization of drilling cores, logging wells and 3D seismic data is used to analyze the characteristics of Bonan sag The research on the genesis of high-quality reservoirs in the sub-fan delta front of the fourth sub-stage indicates that the sedimentary facies belonged to the original physical properties, diagenesis types and intensity differences, formation overpressure strength and occurrence time, Time, fault / unconformity fluid transport and the role of gypsum salt layer are the main factors that control reservoir physical properties in the lower part of the fourth member of the Shahejie Formation. The development of high-quality reservoirs is a combination of specific “source-stream-sink” diagenetic system Favorable depositional conditions are the basis for the development of good reservoirs; favorable channels (faults, unconformities and relatively high porosity and permeability reservoirs) between reservoirs and source rocks are prerequisites for the development of good reservoirs; Shorter migration path of source rocks is the key to the development of high-quality reservoirs. Sufficient fluid sources, hydrocarbon filling and formation overpressure are the guarantees for the development of high-quality reservoirs.