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从有机岩石学与有机地球化学角度研究烃源岩有机质成烃演化和生烃作用是油气资源评价的一个重要方面。本文探讨了贵州六盘水地区煤岩显微组分的生烃潜力和生烃贡献,并对富氢显微组分的组成与氢指数作了相关性研究,提出了计算显微单组分生烃贡献的一种方法。结果表明:研究区的基质镜质体早于树皮体产生液态烃类,富氢显微组分的含量与氢指数表现出很好的相关性;基质镜质体是煤生烃作用的最大贡献者。这一结论对研究区油气资源潜力评价有着重要的参考价值。笔者认为,烃源岩有机质的生烃潜力是针对其生烃性能而言的,是生烃作用的“质”的衡量标准;生烃贡献则是针对其在生烃过程中的生烃配分而言的,是生烃作用的“量化”标准,提出将生烃贡献指标作为烃源岩有机质生烃评价的判别指标的可行性和必要性。
It is an important aspect to evaluate the hydrocarbon evolution and hydrocarbon generation of organic matter in source rocks from the aspects of organic petrology and organic geochemistry. In this paper, the hydrocarbon generation potential and hydrocarbon generation contribution of the coal and rock micro-components in Liupanshui area of Guizhou Province are discussed. The correlation between the hydrogen-rich microstructure and the composition of hydrogen-rich microstructure is studied. A way to contribute. The results showed that the matrix vitrinite produced liquid hydrocarbons earlier than the bark, and the content of hydrogen-rich microstructure showed a good correlation with the hydrogen index. The matrix vitrinite was the largest Contributor. This conclusion is of great value to the potential evaluation of oil and gas resources in the study area. The author believes that the hydrocarbon generation potential of organic matter in hydrocarbon source rocks is a measure of “quality” of hydrocarbon generation for its hydrocarbon generation performance. The contribution of hydrocarbon generation refers to its hydrocarbon generation allocation in the hydrocarbon generation process In the words, it is the “quantification” standard of hydrocarbon generation. The feasibility and necessity of using hydrocarbon generation contribution index as discriminant index of organic matter hydrocarbon generation evaluation of source rock are proposed.