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通过对上古生界烃源岩天然气排气史、天然气运移方向和沉积相带的展布等综合分析 ,可将上古生界天然气的运移聚集分为三叠纪—早白垩世和早白垩世后两个阶段。在三叠纪—早白垩世阶段 ,天然气运移方向主要是向北 ,而在早白垩世后阶段 ,天然气主要是就近运移聚集而成藏 ,这一阶段是鄂尔多斯盆地上古生界天然气重要的运移与聚集期 ,故上古生界煤成气藏的成藏期较晚。鄂尔多斯盆地北部和中部的靖边古三角洲是天然气聚集的有利地区 ,具有较好的天然气勘探前景
Based on the comprehensive analysis of gas evolution history of the Upper Paleozoic source rocks, gas migration direction and distribution of sedimentary facies, the migration and accumulation of the Upper Paleozoic natural gas can be divided into Triassic-Early Cretaceous and Early Cretaceous After the two stages of the world. During Triassic to Early Cretaceous, the migration direction of natural gas is mainly northward. In the late stage of Early Cretaceous, natural gas was mainly migrated and accumulated to accumulate. This stage is important for Upper Paleozoic natural gas in Ordos Basin Migration and accumulation period, so the Upper Paleozoic coal gas reservoirs later accumulation period. The Jingbian Paleo Delta in the northern and central Ordos Basin is a favorable area for gas accumulation and has a good natural gas exploration prospect