Early Forecast and Evaluation on Petroleum Accumulation Conditions in Deep Basin in Northern Continental Margin of the South China Sea

The structures of the basin in the northern continental margin of South China Sea are similar to the graben basins in east China which have double or three layers.Basic geological conditions for migration and accumulation mode of the deep marine basin are similar to the shallow ones,but the basin has deeper sags and rifts,bigger deposits and infillings,developed source rocks,and good source-reservoir-caprock associations.This paper focuses on the early forecast and evaluation on source rocks in deep basin and analyzes the oil and gas resource potential.For the lack of geological information,this paper used geological and geochemical characteristics of the source rocks in the shallow-water and the evaluation parameters as source of references to interpret the sequence stratigraphic profiles across the deep water and research their geology and geophysics.