【摘要】 通过储集层岩性分析、流体包裹体测试、模拟实验等手段,结合地球化学、地震、测井、试油相关资料,详细研究鄂尔多斯盆地上古生界致密气成藏的有利地质条件及致密气藏基本特征,总结致密气勘探开发的关键技术。广覆式生烃和持续性充注的气源条件、大面积分布的三角洲相砂岩储集层与近距离运聚的成藏模式等地质要素的有效配置、共同作用,形成了鄂尔多斯盆地上古生界大型致密气藏。鄂尔多斯盆地上古生界致密气藏含气层组多、面积大,存在多个压力系统,储集层非均质性强,具有先致密后成藏的特点,储量丰度低。全数字地震薄储集层预测技术、致密气层测井精细评价技术与开发集成配套技术为致密气的进一步勘探开发提供了技术保障。更多还原

【Abstract】 Through lithological analysis of reservoirs,fluid inclusion test and simulation experiment,combined with geochemical,seismic,well logging and formation testing data,this paper studies the favorable geological conditions for tight gas accumulation in the Upper Paleozoic of the Ordos Basin,specifies the characteristics of tight gas reservoirs,and summarizes the key techniques for tight gas exploration and development.The gas source conditions of large area hydrocarbon generation and continuous hydrocarbon injection,widespread delta facies sandstone reservoirs,and the accumulation mode of short-distance migration facilitate the formation of the large-scale tight gas reservoirs in the Upper Paleozoic of the Ordos Basin.The Upper Paleozoic tight gas reservoirs in the Ordos Basin cover a large area and have many gas-bearing formations and multiple pressure systems.The tight reservoirs,which were formed before gas accumulation,are of high heterogeneity.Full digital seismic prediction technique for thin reservoirs,fine logging evaluation technique for tight gas reservoirs,and integrated supporting techniques for gas development provide technical support for further exploration and development.更多还原