The formations of Mesozoic group in Dongpu Depression are a group of clastic reservoirs of fluvial facies in the middle and lower Trias.

• 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;