【摘要】 针对南堡一号东营组三段下亚段的一号断层两侧的差异和物源方向认知不匹配的问题,运用岩芯、测井、重矿物、构造、地震剖面、地震属性等资料,研究一号构造带的物源与沉积特征。结果表明,一号构造带发育滨浅湖、辫状河三角前缘沉积相。主断裂不控制沉积展布,断裂两侧发育两支物源,输砂模式不同。西侧三角洲沉积为挠曲坡折控砂,延伸较短,形成舌状三角洲;东侧三角洲沉积为多级断阶坡折控砂,物源延伸较长,形成鸟足状三角洲。一号构造带三角洲水下分流河道与河口坝为优质储层,与构造叠合形成的构造-岩性圈闭发育区可作为该区下一步油气勘探的重点区域。更多还原

【Abstract】 This paper is concerned with an investigation into the provenance and sedimentary characteristics of No. 1 structural belt using data gleamed from core,logging,heavy minerals,structures,seismic profiles,and seismic attributes,in response to greater differences between traps and reservoirs development and the mismatch between these differences and provenance direction cognition,such as occurs on both sides of No. 1 fault in the lower section of the third section of the Dongying formation in the No. 1 structural belt of Nanpu sag. The results show that the No. 1 structural belt develops sedimentary facies of shore-shallow lake and braided river delta front. The main faults do not control the distribution of deposits,contributing to the development of two provenances on both sides of the faults,governed by different sand transport modes. The delta deposits on the west side are underlain by a sand control mode of flexural slope,with a relatively short extension,resulting in the formation of a lobate delta,and the eastern delta deposits are governed by a sand control mode of multi-level fault slope,with a longer extension and consequently the formation of a bird-foot delta. The underwater distributary channels and estuary dams in the delta of No. 1 structural belt are high-quality reservoirs and structural-lithologic reservoirs resulting from superimposition with structures may be the key areas for potential oil and gas exploration in this area.更多还原