Abstract: Ten parameters for characterizing source rocks were taken as factors for establishing fuzzy matrix.The weight coefficients of every factor were determined.The weighted average algorithm was used to compute the synthetic index of source rock evaluation.The further synthetic evaluation of the hydrocarbon-generation matter and hydrocarbon-generation process for source rocks were implemented respectively.This method was applied to 68 evaluating units in Shahejie Formation of Jiyang Depression according to the synthetic index of source rock evaluation.The ranks of hydrocarbon-generation potentials of those evaluating units were presented.The evaluation shows that Lijin Sag is the best sag for hydrocarbon generation,and the lower part of the third member of Shahejie Formation is the most favorable layer of source rocks in Jiyang Depression.

Key words: Jiyang Depression, source rocks, hydrocarbon-generation matter, hydrocarbon-generation process, fuzzy mathematics, synthetic evaluation

摘要： 选择10个烃源岩评价参数,构建了模糊评价矩阵,确定了各参数权重系数,利用加权平均的算法,计算了烃源岩综合评价指数.从生烃物质基础和生烃过程两方面分别对烃源岩进行了评价,进而对其进行了二级综合评价.利用该方法对济阳坳陷沙河街组68个烃源岩评价单元进行了综合评价,并给出其生烃潜力的排序.评价结果表明,在济阳坳陷内,利津洼陷是最好的生油洼陷,Es₃^下是最有利的烃源岩层系.

关键词: 济阳坳陷, 烃源岩, 生烃物质基础, 生烃过程, 模糊数学, 综合评价