摘要:Based on the comprehensive analysis of geological and geochemical characteristics of single well, seismic inversion, sedimentary facies, tectonic burial depth, etc., this paper investigated the characteristics of P1f source rocks, predicted the horizontal distributions of the following aspects: the thickness of source rocks, abundance and type of organic matter, etc. And on this basis, an improved hydrocarbon generation potential methodology together with basin simulation technique were applied to unravel the petroleum generation and expulsion characteristics of P1f source rocks in Fengcheng area. The results show that P1f source rocks distribute widely which are thick, have high total organic content, are dominated byⅡ-type kerogen, and have entered low mature-mature stage. And the modeling results indicate that the source rocks reach hydrocarbon generation threshold and hydrocarbon expulsion threshold at 0.5%Ro and 0.85%Ro and the comprehensive hydrocarbon expulsion efficiency is about 46%. The amount of generation and expulsion from P1f source rocks is 3.185×109 t and 1.531×109 t, respectively, with a residual amount of 1.654×109 t within the source rocks. In general, the P1f source rocks have generated and expulsed large amounts of hydrocarbon, and the expelling occurrs in the late period, indicating a promising tight oil resource prospect.%应用地质、地球化学、测井、地震反演、沉积相和构造埋深等资料,预测烃源岩厚度、有机质丰度和有机质类型等的平面分布,采用生烃潜力方法建立风城组烃源岩的生排烃模式,评价风城组致密油的资源潜力.结果表明:风城组烃源岩分布面积广、厚度大、有机质丰度高,有机质类型以Ⅱ型为主,目前处于低成熟—成熟演化阶段.风城组烃源岩在镜质体反射率Ro为0.5%和0.85%时分别达到生烃门限和排烃门限.风城组烃源岩现今累积生烃量为3.185×109 t,累积排烃量为1.531×109 t,残留烃量为1.654×109 t,其中云质岩致密油与页岩油资源量分别为0.613×109 t和1.565×109 t.综合分析认为,风城组烃源岩类型好、生排烃量大,为晚期排烃,具有广阔的致密油勘探前景.