运用含油气盆地沉积学的理论和方法,在大量岩心、录井、测井及地震资料分析基础上,查明了渤海莱州湾凹陷古近系沙四段上亚段沉积体系的类型、特征及分布规律。莱州湾凹陷古近系沙四段上亚段发育有扇三角洲、盐湖沉积体系,扇三角洲靠近东部和北部盆缘断裂发育,东北部发育碳酸盐浅滩,向沉积中心区域依次发育膏盐沉积和盐岩沉积为盐湖相。扇三角洲分布区为优质油气储层发育,是油气勘探的重点区带。盐岩沉积是形成有利的岩性油气成藏组合带的良好条件。 Based on the analysis of a large number of cores, logging, well logging and seismic data, using the theory and method of sedimentology in petroliferous basins, the types and characteristics of sedimentary systems in the upper Es4 member of Paleogene in the Paleogene of the Laizhou Bay depression in the Bohai Sea Distribution. There are fan delta and salt lake sedimentary system developed in Upper Paleogene of Paleogene of Laizhouwan Depression. Fan delta is developed near basin edge of east and north edge of carbonate basin. Carbonate shoal is developed in northeastern part of the basin, Salt rock sedimentary salt lake facies. Fan delta distribution is the development of high-quality oil and gas reservoirs, and is the key zone for oil and gas exploration. Salt rock deposition is a favorable condition for the formation of a favorable lithologic hydrocarbon assemblage.