对辽河油田原油、有机质的Pb ,Sr,Nd同位素进行了研究。原油、有机质的Pb ,Sr ,Nd同位素资料和分析表明 :在辽河油田 ,仅有极少部分原油与老第三系有机质热解有关 ,大部分原油为地幔流体与古生界、震旦系海相碳酸盐岩壳幔相互作用而生成 ,另一大部分则为地幔流体的CO ,CO2 与H2 的费托合成反应生成。油源对比表明 :老第三纪以下的古生代前陆盆地有更大的油气前景。 The Pb, Sr and Nd isotopic compositions of crude oil and organic matter in Liaohe Oilfield were studied. The isotopic data of Pb, Sr and Nd from crude oil and organic matter show that in the Liaohe Oilfield, only a very small part of the crude oil is related to pyrolysis of organic matter in the old Tertiary. Most of the crude oil is derived from mantle fluid and Paleozoic, Sinian Phase carbonate rocks formed by the interaction of crust and mantle. The other part is generated by Fischer-Tropsch synthesis of CO, CO2 and H2 in mantle fluid. The comparison of oil sources shows that the Paleozoic foreland basins below Oligocene have more oil and gas prospects.