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对近代海洋沉积物、泥炭、福山凹陷第三系泥岩、茂名盆地第三系油页岩和辽河盆地东部凹陷第三系沉积岩剖面等样品中脂肪酸类型和分布特征进行了分析与研究。结果表明以低等浮游动植物为主的沉积中，二元肪酸丰度相对比一元酸占优势。随深程度增加，沥青中脂肪酸高碳数相对减少，低碳数相对增高，偶碳估势逐渐消失。在辽河盆地东部凹陷埋深２２６６ｍ的泥岩中发现脂肪酸仍具有偶碳优势，证明沉积有机质中偶碳脂肪酸优势可以保存到生油高峰前的较高演化阶段，对低熟原油烷烃的生成和具奇碳优势有重要意义
The types and distribution characteristics of fatty acids in modern marine sediments, peat, Tertiary mudstone in Fukuang Sag, Tertiary oil shale in Maoming Basin, and Tertiary sedimentary rock section in the eastern sag of Liaohe Basin were analyzed and studied. The results showed that the abundance of di-fatty acid was higher than that of monobasic acid in sediments dominated by lower zooplankton. With the deepening of degree, the high carbon number of fatty acids in asphalt relatively decreased, while the low carbon number increased relatively, and the estimation of carbon even disappeared gradually. It is found that the fatty acid still has the advantage of even carbon in the mudstone with a depth of 2266 m in the eastern depression of Liaohe Basin. It is proved that the advantage of even carbon fatty acid in sedimentary organic matter can be preserved in the higher evolution stage before peak oil production. The carbon advantage is important