【摘要】 利用ＥａｓｙＲｏ方法重建了东部苏北盆地和西部三塘湖盆地古地温演化模式。结果表明，东部中、新生代断陷型盆地比西部中、新生代前陆型盆地具有更高的古地温梯度。中生代末到第三纪早期，东部苏北盆地古地温梯度大于３６℃／ｋｍ，而西部三塘湖盆地约３０～２５℃／ｋｍ。ＥａｓｙＲｏ方法对这两种类型盆地古地温成功的恢复，说明该方法具有广泛的适用性。烃源岩生油史模拟表明，东部较高古地温梯度的断陷盆地烃源岩具有早生早排的特征，不仅有利于区域上继承性隆起圈闭、而且有利于与断层相关的同沉积构造圈闭的油气聚集；而西部较低古地温梯度的前陆盆地烃源岩具有晚生晚排的特征，主要有利于继承性隆起区圈闭的油气聚集。从烃源区的勘探范围上看，对于同时代的烃源岩，东部断陷盆地要比西部前陆盆地要大。更多还原

【Abstract】 Meso Cenozoic paleogeothermal gradients (PG) have been reconstructed for both Shubei basin in eastern China and Santanghu basin in western China, using Easy R o  algorithm It is indicated that the Shubei basin is characterized by higher PG in over 36℃/km than the Satanghu basin, indicative of foreland basin, in 30 25℃/km from late Mesozoic toearly Cenozoic. It is also suggested that Easy R o  algorithm is suitable for PG restoring of various types of basin. Based on oil generation modelling, it may be inferred that the higer paleogeothermal gradient of Shubei basin resulted in shallower oil generation threshold depth, and made the source rocks generate and expel oil earlyer than the lower paleogeothermal gradient of Santanghu basin did. Therefore, the paleogeothermal gradients which source rocks experienced play an important role in the formation of hydrocarbons.更多还原