摘要
川西北地区上三叠统须一段形成于海湾盆地背景下,主要由碳酸盐岩台地、障壁岛-泻湖及辫状三角洲等沉积体系组成。碳酸盐岩台地体系包括浅滩及海绵生物丘等相带;障壁岛-泻湖体系可进一步划分为障壁海滩、风暴溢流、泻湖及湾头三角洲等沉积类型;辫状三角洲体系的平原相基本上由辫状河道沉积组成,三角洲前缘及前三角洲相带则以快速堆积、滑塌及浊流沉积为主。有机地球化学分析表明,海绵生物丘、泻湖及前三角洲等相带具备较好的生烃潜力。
The main depositional systems identified in No 1 member of Xujiahe formation, which developed in early late-Triassic gulf of NW Sichuan basin, include carbonate platform, bartier island-lagoon, and braid delta, etc. Shallows and sponge bioherms are the main facies of carbonate platform systems. Barrier island-lagoon systems can be subdivided into:barrier beach, storm washover, lagoon, and bayhead delta, etc. Braid delta systems mainly consist of braid river deposits in delta plain facies, rapid accumulation deposits, slump deposits and turbidites in delta front and prodelta facies. Organic geochemical analysis shows that sponge bioherm, lagoon and prodelta facies have good potential of hydrocarbon generation.
出处
《江汉石油学院学报》
CAS
CSCD
北大核心
1992年第1期16-22,共7页
Journal of Jianghan Petroleum Institute
关键词
沉积相
沉积环境
岩相分析
生油层
sedimentary facies
sedimentary environment
lithofacies analysis
late Triassic epoch
source beds
[sedimentary systems]
[Sichuan basin]
