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天然气的成因与有机物质的成岩和热蚀变作用密切有关。在成岩作用的早期阶段细菌作用产生甲烷,而逐渐增强的有机物的热熟化作用产生甲烷和C_2以至C_4碳氢化合物(这里概称为C_2碳氢化合物)。 虽然文献中已发表了大量的天然气甲烷中碳同位素的数据,但对其氘浓度的变化却知道得很少。Cloud等的早期工作表明,在因微生物作用而形成甲烷时有氢的同位素馏分存在。Schiegl和Vogel(1970)等曾报导天然气甲烷中D/H比值的变化达60‰。Nakal等曾测定了生物成因甲烷及伴生水中氘浓度之间的关
The origin of natural gas is closely related to diagenesis and thermal alteration of organic matter. Bacteria act to produce methane in the early stages of diagenesis, while the thermo-maturation of increasingly enhanced organic matter produces methane and C 2 to C 4 hydrocarbons (collectively C 2 hydrocarbons). Although a large number of carbon isotopes have been published in natural gas in the literature, little is known about the changes in their deuterium concentrations. Earlier work by Cloud et al. Showed that hydrogen isotopes exist when methane is formed by the action of microorganisms. Schiegl and Vogel (1970) have reported changes in D / H ratio of 60 ‰ in natural gas methane. Nakal et al. Determined the correlation between biogenic methane and associated deuterium concentrations in water