富台油田下古生界潜山油藏特征

富台油田邻近车西和大王北两个生油洼陷，具有形成下古生界潜山风化壳油藏与潜山内幕油藏的有利条件。车古20、车571等滑脱潜山的形成和发育主要受埕南断层及台阶断层不均衡活动的影响，构造特征十分复杂。下古生界碳酸盐岩储集空间类型复杂多样，储层非均质性较强。油藏在纵向上呈层状分布，包括八陡组—上马家沟组、下马家沟组、冶里—亮甲山组—凤山组、馒头组四套油层。储层的发育程度控制油藏富集高产，生油洼陷烃源岩的最大埋深控制了油藏的含油底界。

Buried hill reservoir characteristic of the lower Palaeozoic in Futai oilfield

Close to Chexi and Dawangbei oil-generation subsag, Futai oilfield has favorable conditions of forming the weathering crust and interior reservoirs in Lower Palaeozoic buried hills. The forming and developing of Chegu 20, Che 571 and other slippage buried hills are mainly controlled by the unbalanced activities of Chengnan fault and its step fault, so the structural feature is very complicated. The types of reservoir space of Lower Palaeozoic carbonatite are complicated and varied, and the reservoir heterogeneity is stronger. The buried hill oil reservoirs are vertically bedded in Lower Palaeozoic, including Badou Formation and Shangma-jiagou Formation, Xiamajiagou Formation, Yeli -Li-angjiashan Formation and Fengshan Formation, and Mantou Formation, totally four sets of oil formation. The enrichment and high yield of oil pools are controlled by the developing degree of reservoir, and the oil-bearing lowest boundary of buried hill reservoirs is controlled by the deepest buried depth of source rocks of the generative sags.