沔阳凹陷油气藏地质特征与油气勘探新进展

通过对沔阳凹陷油气藏地质特征与油气勘探的进展情况进行探讨,得到以下结论:1)生烃中心控制油气分布,油气成藏的有效储集层受沉积相控制,油源断层有效沟通烃源岩和储层,有利于油气运移聚集成藏;2)杨林尾——汊河口断裂斜坡带是新嘴组油气勘探最有利区,白庙、开先台、赵家沟断裂带是新沟嘴组和白垩系油藏勘探的较有利区;3)邻近优质烃源岩的水下分流河道砂体发育区是寻找"小而肥"油藏的有利区。

About Some Geologic Features of Hydrocarbon Reservoirs and New Progression of Oil and Gas Exploration in Mianyang Depression

This paper discusses the geologic features of hydrocarbon reservoirs and new progression of oil and gas exploration in Mianyang Depression. Also it draws the following conclusions. Firstly, the center generating hydrocarbon determines the distribution of oil and gas, the sedimentary facies controls the effective accumulating layers of oil and gas and oil source sections effectively connect hydrocarbon source rock and reservoirs, which is good for oil and gas to move and accumulate into reservoirs. Secondly, the slope fracture belt from Yanglinwei to the mouth of Chahe River is the most favorable zone for prospecting oil and gas in Xinzui Formation. The fracture belt in Baimiao, Kaixiantai and Zhaoiiagou is the more favorable zone for prospecting oil in Xinzui Formation and Cretaceous. And lastly, sand accumulation zones in underwater distributary channel near superior hydrocarbon source rock is the favorable zone for discovering small but rich oil reservoirs.