The Evaluation of Coal-Measure Source Rocks of Coal-bearing Basins in China and Their Hydrocarbon-Generating Models
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摘要: 本文应用有机岩石学方法与有机地球化学方法通过对我国煤成烃盆地典型煤系烃源岩的研究，提出了煤系烃源岩评价指标与标准，并以显微组分成烃规律为基础，建立起了我国含煤岩系的四种主要成烃模式。本研究成果对我国煤成烃勘探具有重要指导意义。Abstract: Detailed research has been done on organic petrology and geochemistry of the coalmeasure source rocks sampled from typical coal basins in China. The following acknowlegements have been obtained:1) Coals can generate a large amount of gas as well as some liquid hydrocarbons during the thermal-maturation evolution. The source matter which can generate oil in coals includes not only exinite, but also desmocollinite and even a part of telocollinite.2) Coal macerals are the main parameters to evaluate the hydrocarbon potential of coalmeasure source rocks. According to the Rock-Eval and element analysis results,the coalmeasure source rocks can be subdivided into four types: c, Ⅱ c,Ⅲ c and Ⅳ c.Ⅰc and Ⅱ c can generate a large amount of oils and may form coal-generated oil and gas fields under the suitable geological background. However,type Ⅲ c and Ⅳ c can mainly generate gas.3) The hydrocar bon-generating patterns of coals mainly depend on the types and amount of hydrocabron-generating macerals. On the base of the hydrocarbon-generating patterns of coal macerals, the hydrocarbon-generating mdel for the four types of coal-measure source rocks has been suggested. This model will be very useful to the evaluation and exploration of coal-measure source rocks of coal-bearing basins in China.
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Key words:
- coal-measure source rock /
- maceral /
- hydrocarbon-generating model
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