鄂尔多斯盆地上古生界压力演化及成藏过程分析
Journal Title: Science Paper Online - Year 2008, Vol 3, Issue 11
Abstract
运用动态分析、综合研究方法及成盆、成烃、成藏理论, 通过对该区沉积埋藏史、成烃史、成岩史、地热史的解剖，结合砂岩泥岩的压实特征、压力成因研究、包裹体等资料，对鄂尔多斯盆地上古生界压力演化及成藏过程进行了详细分析。认为鄂尔多斯盆地上古生界压力演化与成藏过程关系密切，压力作为天然气运移与成藏动力，对上古生界气藏成藏有着深刻影响。根据包裹体形成温度、压力和激光拉曼光谱组成分析研究资料，明确划分了不同类型气藏的成藏期次，提出了压力演化及成藏过程的3个关键阶段。即：埋藏加载增压原生气藏成藏阶段、剥蚀抬升卸载减压原生气藏成藏阶段、稳定调整减压次生气藏成藏阶段。强调早白垩世以后构造抬生剥蚀对上古生界气藏形成更为重要。同时指出，压力封存箱内非烃源泥岩、烃源岩、砂岩的地层压力形成与演化存在明显的差异，对上古生界各气藏的成藏过程有不同的影响。在对成压与成藏的6个过程详细描述的基础上，建立了鄂尔多斯盆地上古生界压力与成藏演化模式。
Authors and Affiliations
Zhongdong LI, Shaonan ZHANG, Liang LI, Kuanyang HUI, Min GUO
Keywords
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