摘要
南海北部大陆边缘陆坡区的沉积凹陷积厚、面积大,但勘探程度低,是油气勘探的新区。本文根据有限的地质、地球物理资料的分析认为,该区存在始新统、渐新统和中新统三套生烃层,广泛分布有三角洲、生物礁、低水位扇、盆底扇、海底水道砂等大型储集体,还发育了面积较大的披覆背斜、挤压背斜、古潜山、地层超覆等圈闭,具备形成大、中型油气田的基本石油地质条件。笔者从分析含油气系统入手,论述了研究区的成藏条件,以展示了良好的含油气远景。
The shelf region in the northern continental margin of South China Sea covers a large area where is a frontier for hydrocarbon exploration. Based on recent geological and geophysical data, the sedimentary depressions in this region have thick deposits with wide territory. There are Eocene, Oligocene and Miocene source rocks deposited there, and large scale deltaic sandstone, organic reefs, lowstand fan sandstone, basin floor sandstone and submarine channel sandstone are present. A lot of traps, including large drape anticlines, compressional anticlines, buried-hills and stratigraphical traps are developed, being basic conditions for large and medium oil and gas fields. The authors discussed hydrocarbon accumulation and hydrocarbon potential in this region in terms of the concept of petroleum system.
基金
国家自然科学基金
关键词
南海
大陆架
生油岩
含油气系统
远景评价
Continental shelf, source rock, petroleum system, prospective evaluation, South China Sea
