惠民凹陷南坡天然气藏形成条件及勘探方向

从气源岩、储层、圈闭等方面分析了惠民南坡的天然气成藏条件，认为该区烃源岩条件良好，有古近纪的暗色泥岩和石炭一二叠纪煤系地层作为气源岩，同时该区深大断裂发育，岩浆活动强烈，还具有充足的非烃气源；地层发育全，沉积体系多，发育多种类型的储集层，形成6套储盖组合，具备天然气聚集成藏的良好地质条件。研究表明，曲堤地垒和济阳地堑东部的古生界圈闭是深层气勘探的有利方向，非烃气的主要勘探方向是王判镇潜山带的新近纪地层构造圈闭和浅层“亮点”岩性圈闭。

Forming Condition and Exploration Direction of Natural Gas Reservoir in South Slope of Huimin Depression

Based on the gas source rocks, reservoir, trap and so on, the formation condition of natural gas deposit in the south slope of Huimin depression is introduced in this paper. It is regarded that the Tertiary dark mudstone and Carboniferous- Permian coal system are good gas reservoir. On the one hand, the discordogenic faults devel- oped widely with strong magmatic activities and abundant nonhydrocarbon source in this area. On the other hand, he strata developed entirly with rich sedimentary systems. Many kinds of reservoir beds exist in this area. It is favorable for natural gas accumulation. As showed by the study, Palaeozoic traps in Qudi horst and Jiyang graben are good for gas exploration in deep part. The good directions of nonhydrocarbon exploration are the Neocene structural -stratigraphic traps of Neocene in Wangpan town buried hill belt and shallow ＂bright spot＂of depositional traps .