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本文用时温指数(TTI)研究松辽盆地石油演化,确定了松辽盆地油气演化上下界限的 TTI 值分别为15和90,生油峰值为37;证明了 TTI 与镜质体反射率,氯仿沥青“A”,碳氢元素及原油比重都有一定的规律。文中应用19口井的资料确定了各生油层的成油期,区别地质发展史不同的沉积凹陷的生油特征。从构造形成时间与成油期的配合上研究油气藏的形成,圈定生油岩的成熟区。
In this paper, the TTI of Songliao Basin was used to study the evolution of oil in Songliao Basin. The TTI values of upper and lower limits of hydrocarbon evolution in Songliao Basin were determined to be 15 and 90, respectively, and the peak value of oil generation was 37. The TTI and vitrinite reflectance, “A”, hydrocarbon elements and the proportion of crude oil has a certain law. In this paper, the data of 19 wells are used to determine the oil-forming period of each oil layer and to distinguish the oil generation characteristics of sedimentary sags with different geological development history. Study the formation of oil and gas reservoirs from the cooperation of tectonic formation time and oil-formation period, and delineate the matured area of the source rock.