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

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