OALib Journal期刊
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川东北地区石炭系油气成藏模式
Keywords: 油气性质与来源,成藏地质条件,成藏模式,石炭系,川东北
Abstract:
?明确川东北地区石炭系油气充注特征、成藏机理有助于对其含油气系统进行深入认识。应用成藏动力学理论,以典型油气藏解剖为基础,以流体来源及其流动样式为核心,采用流体定年技术和油气运移方向示踪技术,通过样品分析测试、数值模拟实验和成藏机理的综合研究表明:志留系有机质是主要的供烃源,黄龙组裂缝—溶孔状白云岩为有利储集体,印支—燕山期地层—构造复合型圈闭提供了聚集空间|黄龙组主要存在210ma和170ma2期油气充注过程,多期活动的构造裂缝和高压水力破裂缝与s/c不整合及c/p不整合构成了网状输导体系,从下至上的垂向运移特征显著,侧向局部小范围有一定的运移指向|整体呈现出“下生上储”的喜马拉雅期调整改造式成藏模式。
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