渤海湾盆地"四扇一沟"沉积体系及其油气意义

阐述了渤海湾及其外围古近系有利于油气的沉积相的特点和分布,以及它们对油气分布的影响.沉积相受构造的影响很明显,形成的沉积体可以为油气的勘探提供有利的预测.沉积体系的划分应该概念明确,各分类之间不应有重叠之嫌.渤海湾地区的沉积体由冲积扇相、湖成三角洲相、扇三角洲相、湖底扇相、非扇沟道浊积岩相、滨湖-浅湖滩坝相、半深湖-深湖相(亚相)等组成.研究了各沉积体系的特点,并从生储盖的角度研究各体系的储层的特点.

SEDIMENTARY SYSTEM OF "FOUR FANS AND ONE CHANNEL" IN THE BOHAI GULF BASIN AND ITS SIGNIFICANCE FOR PETROLEUM EXPLORATION

This paper discusses the characteristics and distribution of sedimentary facies favorable for petroleum accumulation in Paleogene strata in the Bohai Gulf and its surroundings and their control on petroleum distribution.The sedimentary facies are obviously affected by structure.The understanding of the distribution of the sedimentary bodies is conducive to predicting petroleum distribution and can guide petroleum exploration.The classification of sedimentary systems should be based on a clear concept and various types of facies allow no overlapping.The sedimentary bodies in the Bohai Golf consist of fluvial fan facies,lacustrine delta facies,fan-delta facies,sublacustrine fan facies,non-fan channel turbidite facies,lakeshore-shallow lake beach-bar facies and semi-deep lake-deep lake facies(subfacies).The authors have studied the characteristics of various sedimentary systems and the characteristics of reservoirs of various systems in terms of source-reservoir-sealing.