Abstract: Hydaocarbon-yielding rates in different stages of evolution from various types of immature soxxrce rocks are obtained by means of thermal simulation technidue and the valumcs of mature source rocks in different stages of evolotion are obtained by Geothermal Gradient method. Thus, a formula for the evaluation of gas prospects is suggested in accardance with the hydrocarbongenerating mechanism of kerogen degradation and the principle of material balance. Simulaxtecl temperatures axre correlated vitrinite reflectaxnces, to give a correlation between the simulated and the process of natural evolution under actual geological conditions. Volumes of gas-generated in different stages are calculated by this suggested formula. The summation of the volumes evolued in various stages will give the total volume of the gas generated in the basin studied.

摘要： 本文利用热模拟法获得各类未成熟生油岩不同热演化阶段的产烃率,用地温梯度法获得成熟生油岩各演化阶段的体积,将二者结合,根据干酪根热降解成烃机理及物料平衡原则,提出了生气量计算公式。通过模拟温度与镜质体反射率的转换,使人工模拟与地质条件下的自然热演化相联系,按照公式求出各热演化阶段的生气量,各阶段之和即为该盆地的总生气量。