东濮凹陷中生界油气勘探潜力探讨

东濮凹陷中生界地层为一套中下三叠统内陆河湖相碎屑岩沉积，砂岩比较发育，但砂岩本身储集能力很差，要形成油气藏只能靠裂缝改造，从而形成裂缝性油气藏；在勘探中一般采取兼探的方式，因此中生界油气藏的勘探潜力仍是个未知数，国内外油气田均有中生界油气藏存在，东濮凹陷中生界试油有6口井获工业油气流，28口井见各种油气显示，证明了东濮凹陷中生界具有一定的勘探潜力；根据中生界储层裂缝形成的机理及构造发育史，结合中生界钻井、录井、测井、试油等资料，分析预测东濮凹陷中央隆起带北部文明寨至户部寨地区为中生界油气富集区。

Search and Discussion of Exploration Potential for Mesozoic Oil and Gas of Dongpu Depression

The formations of Mesozoic group in Dongpu Depression are a group of clastic reservoirs of fluvial facies in the middle and lower Trias.The sandstone is well developed but poor in its storage capacity,and as a result,the formation of reservoirs depends only on fractures.As facultative practice is generally adopted in exploration activities,the exploration potential for oil and gas in Mesozoic formations still remain unknown.Mesozoic reservoirs are found to be existent in oil fields both home and abroad.The formation tests performed in the six wells in Mesozoic group of Dongpu Depression have witnessed comercial oil and gas flow and 28 wells have seen oil and gas shows of various kinds.Based on the mechanism of fracture forming and its history of structural growth,an analytic prediction is here by made of the oil-gas accumulation of Mesozoic group in both Wenmingzhai and Hubuzhai.