阳信洼陷油气分布规律及勘探方向

Distribution rule and exploration orientation of Yangxin subsag.

阳信洼陷油气成因和分布规律复杂,为指导油气勘探,对油气资源、储集条件与储盖组合、油气藏类型等进行了综合分析。研究表明,多种油气源、多类型储层与多种圈闭条件构成了洼陷油气富集的重要因素,纵向上油气呈成熟油、低熟油、生物气的分布规律,平面上多成因油气叠合连片;沙四段上亚段的成熟油和沙一段生物气是今后勘探的方向,斜坡带鼻状构造和断裂带的鼻状构造则是油气勘探的重要目标。

The oil-gas origin and distribution rule of Yangxin sub-sag are complicated. In order to guide oil-gas exploration, synthetic analysis is carried out on oil-gas resources , reservoir conditions, combination of reservoir and caprock, oil-gas deposit style and so on. Study showed that the main factors dominated oil-gas enrichment of Yangxin subsag are diversified hydrocarbon sources, multiple types of reservoir bed and various traps. Vertical oil-gas distribution rule is as maturated oil, low-maturated oil and biogenic gas, while the lateral is oil-gas lapped over and bordered upon with each other of various geneses. Maturated oil in upper Es4 and biogenic gas in Es1 are orientation for the future exploration, and the key targets are nosing structures of slop zone and fault zone.