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针对影响石炭系—二叠系油气地质条件与油气资源潜力评价的关键地质问题,开展产、学、研联合攻关,采用盆山结合、地质与地球物理结合的工作手段,在石炭纪—二叠纪盆地形成与演化、沉积体系与沉积相展布、石炭系—二叠系烃源岩评价等方面取得了系列新认识。明确了银额盆地及其邻区石炭纪—二叠纪为典型的裂谷裂陷盆地,晚石炭世—早二叠世为盆地发育的鼎盛时期,以浅海陆棚相沉积为主;发现多套厚度大、横向分布稳定,且有机质丰度中等—高,并以Ⅱ型干酪根为主的成熟—高成熟烃源岩,不存在区域变质;于上古生界风化壳钻获的天然气和原油地球化学特征指示与石炭系烃源岩具有显著亲缘关系;初步预测研究区石炭系—二叠系油气资源前景,圈定了有利勘探区和较有利勘探区。
In view of the key geological problems that affect the geological conditions of Carboniferous-Permian hydrocarbon and the potential evaluation of oil and gas resources, joint research of production, study and research is carried out. By means of basin-mountain combined with geological and geophysical methods, Basin formation and evolution, sedimentary system and sedimentary facies distribution, Carboniferous - Permian hydrocarbon source rock evaluation made a series of new understanding. It is clear that the Carboniferous-Permian basin is a typical rift rift basin in the Yinbian Basin and its adjacent areas. The Late Carboniferous-Early Permian basin was the heyday of the basin’s development with shallow continental shelf facies. Thickness and lateral distribution of stable and moderate abundance of organic matter - high, and type II kerogen-based mature - high maturity source rock, there is no regional metamorphism; in the Upper Paleozoic weathering crust weathered the natural gas and crude oil Earth The chemical characteristics indicate a significant genetic relationship with the Carboniferous hydrocarbon source rocks. The prospects of the Carboniferous-Permian hydrocarbon resources in the study area are initially predicted, and favorable exploration areas and favorable exploration areas are delineated.