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莺-琼盆地梅山组烃源岩有机质类型在Van Krevelen图上为典型Ⅲ型。据光学显微镜分析,其树脂体含量<4%,平均含量1.5%~2%;且颗粒细小(1~3μm),显微组分以无定形、镜质体和情质体为主。透射电子显微镜(TEM)分析,发现成熟度较低(<0.7%R_0)的梅山组烃源岩干酪根中广泛存在<1μm的超微树脂体,其丰度可达5%~10%。而较高成熟度下,则其中广泛存在亚微粒体和微粒体。梅山组烃源岩的饱和烃和芳烃馏分检测出十分丰富的杜松烷系列化合物。超微层次和分子级层次是梅山组植物树脂的主要赋存形式。梅山组烃源岩是良好气源岩,丰富的树脂物质使其生气强度大大提高。从有机岩石学角度研讨了煤和陆源有机质烃源岩的生烃潜力。
The organic matter type of the source rocks of the Meishan Formation in Ying-Qiong Basin is typical of Type III in the Van Krevelen diagram. According to the optical microscope analysis, the resin content is less than 4%, the average content is 1.5% ~ 2%, and the particles are fine (1 ~ 3μm). The microstructure is dominated by amorphous, vitrinite and psychedelic. Transmission electron microscopy (TEM) analysis revealed that ultramicro resin bodies <1 μm in kerogen were found in the matured Maishan formation with low maturity (<0.7% R_0), with an abundance of 5% ~ 10%. At higher maturity, sub-microsomes and microsomes are widely present. The saturated and aromatic fractions of the source rocks of the Meishan Formation detected a very rich series of juniperine compounds. The ultrastructure level and the molecular level are the main occurrences of plant resin in Meishan Formation. Meishan Formation source rock is a good source rock, rich resin material to greatly enhance the gas generation. Hydrocarbon generation potential of coal and terrigenous organic source rocks from the perspective of organic petrology.