摘要
以渤海湾盆地济阳坳陷为例，分析了缓坡带油气成藏的主控因素，提出了缓坡带的“成因-结构分类”；以基底断层与盖层断层的发育程度、活动时期、组合方式作为划分标准，将陆相断陷盆地缓坡带划分为坡折式、断阶式、半地堑式和垒-堑式4种类型。不同类型缓坡带的石油地质特征具有较大差异，分别形成不同的油气成藏组合，油气富集程度差别较大。断阶式和半地堑式缓坡带是油气富集程度较高的缓坡带类型；垒-堑式缓坡带下部油气比较富集，上部通常难以成藏；坡折式缓坡带油气富集程度较低。
Taking Jiyang Depression of Bohai Bay Basin as an example, this paper analyzes master control factors of reservoir forming in gentle slope belt, and gives “genesis-structure classification”. Regarding development degree, movement period and combination pattern of basement fault and caprock fault as classifying standard, it divide gentle slope belts of continental fault basin into four types： slope-break, faulted step, semi-graben and horst- graben. Petroleum geological characteristics of the gentle slope belts with different types possess much difference, and respectively form different combinations of reservoirs, with much variation in hydrocarbon enrichment degree. The slope belts of faulted step and semi-graben have higher hydrocarbon enrichment degree ; the lower part of horst-graben slope belt is abundant of oil and gas, while the upper part is difficult to gather and enrich oil and gas ; slope-break belt has lower enrichment degree.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2009年第1期15-18,共4页
Petroleum Geology & Oilfield Development in Daqing
基金
中国石化集团公司攻关项目（P02004）资助.
关键词
缓坡带
断陷盆地
构造样式
油气藏
济阳坳陷
gentle slope belt
rift basin
structural style
reservoir
Jiyang Depression
