【摘要】 鄂尔多斯盆地中部奥陶系风化壳天然气运移是迄今研究比较薄弱的重要问题 .在前人工作的基础上 ,依据实际的地质和地球化学资料 ,分析了鄂尔多斯盆地中部奥陶系风化壳天然气的运移特征 .研究认为 ,以靖边为中心的中部气区是天然气运移的有利区 .奥陶系风化壳天然气的运移较为复杂 ,既有奥陶系来源天然气的侧向运移 ,又有上覆石炭—二叠系来源天然气的穿层运移 .这与研究区的构造演化、古流体等研究结果相吻合更多还原

【Abstract】 On the basis of previous works and a lot of actual geological and geochemical data, the migration characteristics of natural gas from Ordovician weathered crust in central Eerduosi Basin are analyzed. The analysis result shows that the middle part (around Jingbian) of Eerduosi Basin is the favorable area for natural gas migration and accumulation. It’s held that the Ordovician weathered crust natural gas can migrate laterally from Ordovician carbonates and vertically from Upper Paleozoic source rocks. These conclusions are consistent with the regional tectonic evolution and the studies of paleo-fluid in Eerduosi Basin.更多还原