东濮凹陷文留构造东营组油藏成藏特征

Reservoir Formation Characteristics in Dongying Formation Wenliu Structure in Dongpu Depression

文留构造断层十分发育,东西两翼被平行于长轴的文东、文西大断层切割后,其顶部形成地垒构造带,该构造的下第三系沙河街组油气丰富。东营组油藏是东濮凹陷复合式油藏最上部的一组油藏,油源来自下伏地层沙河街组,储集层为薄层砂岩,油气聚集在邻近油源的圈闭中,属次生油藏,按其成因可分为构造油藏和构造-岩性油藏。

Wenliu structural fault is well grown ,of which its horst structural zone is formed in the crest, oil and gas is a-bundant in Shahejie Formation of Eogene after the eastern and western limbs are cut by Wendong and Wenxi faults, which are parallel to the long axis. Reservoir of Dongying Formation is above that of Shahejie Formation, which is a set of upmost reservoirs above the composite reservoirs in Dongpu Depression. Oil sources are from underlying Shahejie Formation , its reservoir is within the thin sandstones, oil and gas are accumulated in traps near the oil sources, which belongs to secondary reservoirs. Based on the geneses, the reservoirs would be divided into structural reservoirs and structural+li-thologic reservoirs.