【摘要】 世界上大多数含盐盆地都是含油气区。传统地质理论认为膏盐是蒸发作用的产物，具有良好的封盖性能，因此其下易形成油气田。但现今勘探成果表明，膏盐并非均由蒸发作用形成，且多与油气田共生。油气之所以与膏盐共生，是因为地幔流体沿深大断裂进入低速高导层后，开始了费托合成反应，从而形成一系列幔源烃，幔源烃之上，热卤水直接沉淀而形成盐。江汉盆地、塔里木盆地、鄂尔多斯盆地等厚盐层之下，极有可能存在大型油气田。更多还原

【Abstract】 The majority of salt-bearing basins in the world are petroliferous basin. The traditional geologic theory showed that gypsum-salt as the product of evaporation has better seal capability, so the oil/gas field can easily form under it. However, the exploration practice showed that not all gypsum-salt resulted from evaporation and it is mostly associated with oil/gas pool. This is because mantle fluids nuderwent mantle composition reaction after they flowed into weathering conductive layers along deep and major faults to form a series of mantle-sourced hydrocarbon on which hot brines precipitated to form salt. Therefore it is inferred that large-sized oil/ gas field probably occurrs beneath thick salt layers in Jianghan, Tarim and Erdos basins.更多还原