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石油地质中确定生油岩有机质的变质程度常用镜煤反射率、固定碳、挥发份等物理化学指标。但在我国南方广大碳酸岩地层分布区一般很难找到标准的镜煤,却常见到各种形态的固体沥青。这方面地质部第八石油普查大队韩世庆,石油地质综合大队林等忠等对江南隆起周缘古生界产出的沥青作过大量调查研究,但是这类沥青在成岩-变质作用中
Petroleum geology to determine the degree of metamorphism of organic matter in the source rocks mirror vitrinite reflectance, fixed carbon, volatile matter and other physical and chemical indicators. However, it is generally difficult to find the standard mirror coal in the vast carbonate rock formation in the southern part of China. However, solid bitumen of various forms is commonly seen. In this regard, Han Shiqing, the eighth census team of the Ministry of Geology, Lin et al., Made a great deal of investigation on the bitumen produced by the Paleozoic on the periphery of the Jiangnan Uplift. However, such bitumen has been widely used in diagenesis and metamorphism