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在对鄂尔多斯盆地陇东地区三叠系延长组长6-长8 油层组沉积相特征、岩相古地理演化研究的基础上,详细研究了区内长6-长8油层组成岩作用类型及特征,主要成岩作用类型有压实、胶结、溶蚀、重结晶等成岩作用;并深入研究了成岩相类型、特征,包括了泥岩压实相、压实—压溶相、残余原生粒间孔一次生溶孔相、次生溶孔相和微裂缝相等5类;根据储集砂岩中充填物组合类型分出10种亚成岩相,进而阐述了不同成岩相的平面分布。为进一步研究成岩相对储层的形成与发育的影响提供了重要的基础资料。
Based on the study of sedimentary facies and lithofacies palaeogeographic evolution of Chang 6 reservoir in Yanchang Formation of Triassic Yanchang Formation in Longdong area in Ordos Basin, the types and characteristics of diagenesis of Chang6 to Chang8 reservoir in detail , The main types of diagenesis are diagenesis such as compaction, cementation, dissolution and recrystallization. The types and characteristics of diagenetic facies are studied in depth, including mudstone compaction, compaction-pressure dissolving, There are five kinds of dissolution facies, secondary dissolution facies and micro-fractures. According to the types of fillings in the reservoir sandstones, ten kinds of sub-diagenetic facies are separated, and then the plane distribution of different diagenetic facies is expounded. It provides important basic data for further studying the influence of diagenesis relative reservoir formation and development.