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笔者对洞庭盆地下第三系干酪根进行了直观的研究,在显微镜下观测其颜色和类型,共观测样品31块,分属9口钻井。观测结果表明,这一盆地下第三系生油岩的有机质多为腐植型,此类型生油能力极小。同一生油岩中所含的孢子和花粉化石为棕黄色到棕色,这指明有机质已达到成熟或高成熟状态。由于洞庭盆地下第三系的生油母质类型甚差,所以,本文认为很难期望这里的生油岩具有良好的生油潜力。
The author of the Dongting Basin under the Tertiary kerogen conducted an intuitive study of its color under the microscope and type observed a total of 31 samples, belonging to 9 drilling. The observations show that most of the organic matter in the Tertiary source rocks in this basin is humus, and this type of oil generation ability is extremely small. Spores and pollen fossils contained in the same source rock are brown to brown, indicating that the organic matter has reached maturity or high maturity. Due to the very poor parent material type of the Lower Tertiary in the Dongting Basin, this paper argues that it is difficult to expect that the source rocks here have good potential for oil generation.