THE HYDROCARBON GENERATING POTENTIAL AND CONTRIBUTION OF HYDROGEN RICH MACERAL IN LONGTAN COAL BEARING FORMATION, LIUPANSHUI AREA, GUIZHOU PROVINCE
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摘要: 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.Abstract: Based on the study of organic geochemistry and organic lithology,this paper mainly discussed the question of the hydrocarbon generating potential and contribution of hydrogen-rich maceral in Liupanshui area,Guizhou province.The authors analysed relationship between composition of hydrogen rich maceral and hydrocarbon generating quantity and put forward one method for calculating hydrocarbon generating contribution.It can be concluded that there is close relationship between composition of hydrogen rich maceral and hydrocarbon generating quantity,and esmocollonite pay more contribution to the hydrocarbon generating process.The hydrocarbon generating potential is the qualitative criterion and the hydrocarbon generating contribution is the quantitative criterion.Therefore hydrocarbon generating contribution can be acted as the important criterion for evaluation of hydrocarbon generation of organic matters.
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[1] 向英富,陈宗富.贵州晚二叠世沉积相及其演变规律探讨.贵州地质,1989,6(3):191～202 [2] 王飞宇,傅家谟,刘德汉.煤与陆源有机质生油岩有机岩石学特点及评价.石油勘探与开发,1994,21(4):30～35 [3] Bertrand P et al.Composition of potential oil from humic coals in relation to their petrograp hic nature.Org.Geochem.,1989,10(3):10～26 -
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