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The unconformity characteristics and stratigraphic reservoir-forming model of Chezhen sag
Author(s): 
Pages: 16-19
Year: Issue:  5
Journal: PETROLEUM GEOLOGY AND ENGINEERING

Keyword:  车镇凹陷地层不整合不整合面地层油气藏;
Abstract: 受区域构造运动影响,车镇凹陷多次发生构造抬升与沉积间断,目前保存6期主要的地层不整合.车镇凹陷具有"双元地质结构",决定了古近系与前古近系分别具有不同的断裂体系和油气成藏条件,广泛分布的燕山期不整合面对油气的聚集成藏具有重要控制作用.不整合可改善下伏地层的储集物性,作为油气侧向运移的通道,并形成地层圈闭,提供油气聚集的场所.车镇凹陷发育三种类型的地层油气藏,潜山油气藏(基岩油气藏)、削蚀油气藏和超覆油气藏分别发育于不同的含油气层系,具有不同的成藏特征和分布规律.削蚀油气藏和超覆油气藏具有较大的勘探潜力,是车镇凹陷重要的勘探方向.
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