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地质学报  2009 

渤海湾地区X型正断层及油气意义

, PP. 1083-1088

Keywords: X型正断层,右行走滑,基底断裂,油气成藏,渤海湾

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Abstract:

本文主要利用地震资料解释成果,对渤海湾地区广泛发育的X型正断层的剖面变形特征、形成演化过程和机理及其油气意义进行分析。渤海湾地区X型正断层可分为新生型和继承型两类,在剖面上组合形成对称或非对称的X型形态。新生型和继承型X型正断层具有不同的形成演化过程与控制机理。新生型X型正断层与断裂带的右行走滑作用有关,是在断层的同步滑动过程中形成的。而继承型X型正断层的形成与基底先存断裂的继承性活动密切相关,是基底断裂优先活动的结果。渤海湾地区X型正断层对油气聚集成藏的有利作用主要表现在:有利于构造和地层圈闭的形成,有利于油气发生运移;有利于改善储层物性。与X型正断层相关的构造和地层圈闭是渤海湾地区值得关注的重要油气勘探领域。

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