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题名: Carbon and hydrogen isotopic compositions and their evolutions of gases generated by herbaceous swamp peat at different thermal maturity stages
作者: Duan Yi ; Zhang XiaoLi ; Sun Tao ; Wu BaoXiang ; He JinXian ; Xu Li
刊名: CHINESE SCIENCE BULLETIN
出版日期: 2011
卷号: 56, 期号:13, 页码:1383-1389
关键词: peat ; simulation experiment ; coalbed methane ; staged gas accumulation ; carbon and hydrogen isotopes ; Qinshui Basin
学科分类: Multidisciplinary Sciences
英文摘要: The influences of water media on the hydrogen isotopic composition of organic-thermogenic natural gas were tested in three series of experiments on coal pyrolysis, with no water, deionized water water (delta D(H2O)=-58 parts per thousand), and seawater (delta D(H2O)=-4.8 parts per thousand) added, respectively. The experimental results show that the productivities of H(2) and CO(2) obviously increased under hydrous conditions and that the productivity of CH(4) also remarkably increased in the high-evolution phase of hydrous experiments. Water was involved in the chemical reaction of hydrocarbon generation, and then the hydrogen isotopic composition of methane was affected. There is a linear correlation between the hydrogen isotopic composition of methane and its productivity, as reflected in the three series of experiments. In the case of the same CH(4) productivity, the hydrogen isotopic composition of the methane produced in anhydrous experiments was the heaviest, that of the methane produced in seawater-adding experiments came second, and that of the methane produced in deionized water-adding experiments was the lightest. The hydrogen isotopic composition of natural gas/methane is affected by the following factors: 1) the characteristics of hydrogen isotopic composition of organic matter in source rocks, 2) the thermal evolution extent of organic matter, and 3) fossil-water media in the natural gas-generation period. The experimental results show that the influence of the fossil-water medium in the natural gas-generation period was lower than that of the other factors.
收录类别: SCI
所属项目名称: National Natural Science Foundation of China [40872092, 40772069]; Chinese Academy of Sciences; National Basic Research Program of China [2005CB422105]
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.lig.ac.cn/handle/132962/2145
Appears in Collections:油气地球化学研究室_期刊论文

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Duan Yi; Zhang XiaoLi; Sun Tao; Wu BaoXiang; He JinXian; Xu Li.Carbon and hydrogen isotopic compositions and their evolutions of gases generated by herbaceous swamp peat at different thermal maturity stages,CHINESE SCIENCE BULLETIN,2011,56(13):1383-1389
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