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甲烷及其同系物δ13C值反序排列特征的数值模拟与非生物成因天然气藏探讨

李春园,  王先彬,  夏新宇

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文章导航 > 沉积学报  > 1999 >  17(2): 306-311
李春园, 王先彬, 夏新宇. 甲烷及其同系物δ13C值反序排列特征的数值模拟与非生物成因天然气藏探讨[J]. 沉积学报, 1999, 17(2): 306-311.
引用本文: 李春园, 王先彬, 夏新宇. 甲烷及其同系物δ13C值反序排列特征的数值模拟与非生物成因天然气藏探讨[J]. 沉积学报, 1999, 17(2): 306-311.
shu
LI Chun yuan, WANG Xian bin, XIA Xin yu. The Possibility and Explanation of Complete Reverse Isotopi c Distribution of Light Hydrocarbons in Natural Gas[J]. Acta Sedimentologica Sinica, 1999, 17(2): 306-311.
Citation: LI Chun yuan, WANG Xian bin, XIA Xin yu. The Possibility and Explanation of Complete Reverse Isotopi c Distribution of Light Hydrocarbons in Natural Gas[J]. Acta Sedimentologica Sinica, 1999, 17(2): 306-311.
shu

甲烷及其同系物δ13C值反序排列特征的数值模拟与非生物成因天然气藏探讨

  • 中国科学院兰州地质研究所气体地球化学国家重点实验室

基金项目: 国家自然科学基金
详细信息
    作者简介:

    李春园,男,1964年出生,博士,研究员,地球化学

  • 中图分类号: P593;P618.13

The Possibility and Explanation of Complete Reverse Isotopi c Distribution of Light Hydrocarbons in Natural Gas

  • Lanzhou Institute of Geology Chinese Academy of Sciences Lanzhou China 730000

    摘要
  • 摘要: 本文采用数值模拟的方法对天然气中甲烷及其同系物的δ13C排序特征进行了研究,结果表明:两种具正序分布特征的生物成因天然气混合后可产生具反序分布特征的天然气.相应地,两种具反序分布特征的非生物成因天然气混合后也可产生具正序分布特征的天然气.对于前者而言,作为混合的两个端元天然气,它们必须具有不同的成因或来源,或它们是明显不同的演化阶段的产物.关于松辽盆地昌德气藏若干口天然气井甲、乙、丙、丁烷碳同位素排序特征的讨论表明,用两种生物成因天然气混合的观点很难解释这种反序排列.
    Abstract: Carbon isotope distribution among the C1 to C4 hydrocarbon is one of the most important criteria to identify the genesis of natural gas.Generally,bio genic natural gases possess a “normal distribution ”in carbon isotopes of C 1 to C4 hydrocarbons and abiogenic natual gases a “reversal distribution”in carbon isotopes of C1 to C4 hydrocarbons.Some scholars consider that “isot opic reversals”can result from the mixture of two kinds of biogenic natural gas with “normal distribution” in carbon isotope.However,prevenient numerical sim ulation did not confim the viewpoint.By means of numerical simulation,the possib ility of “isotopic reversals” in C1 to C4 hydrocarbons resulted from the mixture of two kinds of biogenic natural gas was discussed in this paper. Computation in this article shows that a complete reverse carbon isotopic distri bution among C1 to C4 hydrocarbons (i.e. δ13C methane >δ13 C propane >δ13C n-butane) can be produced by the mixture of two kinds of biogenic gas with a normal carbon isotopic distribution (i.e. δ13C m ethane <δ13C ethane <δ13 propane <δ13C n-butane). While a normal carbon isotopic distribution in natural gas can also be produced by two e ndmembers with reverse distributions. As for the first case, the two endmembers should be of different source, different formation, or of different evolutional stage. It is unreasonable to explain the isotopic reverse distribution of the gas sampl es from several wells of the Changde pool, Songliao Basin by the mixture model, because the isotopically higher endmember needed to form this real gas is not fo und in Songliao Basin. So a better explanation to the isotopic reversal in this gas pool is to consider it to be abiogenic.
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    • 参考文献(19)
  • [1] Chung H M, Gormly J R， Squires R M, Origin of gaseous hydroc arbons in subsurface environments; theoretical considerations of carbon isotope distribution[J] . Chemical Geology, 1988, 71∶ 97～103
    [2] McCarty H B, Felbeck G T, High temperature simulation of petroleum for mation-Ⅳ. Stable carbon isotope studies of gaseous hydrocarbons[J] . Organic G eochemistry, 1986, 9∶ 183-192
    [3] James A T. Correlation of natural gas by use of carbon isotopic distr ibution between hydrocarbon components[J] . American Association of Petroleum G eologists Bulletin, 1983, 67∶ 1176～1991
    [4] Galimov E M. Sources and mechanisms of formation of gaseous hydrocarb ons in sedimentary rocks[J] . Chemical Geology. 1988, 71∶77～95
    [5] Clayton C. Carbon isotope fractionation during natural gas generation from kerogen[J] . Marine and Petroleum Geology. 1991, 8∶232～240
    [6] Des Marais D J, Donchin J H, Nehring N L et al. Molecular car bon isotopic evi dence for the origin of geothermal hydrocarbons[J] . Nature, 1981, 292∶ 826～8 28
    [7] Chang S, Des Marais D J, Mack R, Prebiotic organic synthesis and the o rigin of life[A] . In： Schopf J W, ed, Earth's earliest biosphere, its origin and evolution[C] . Princeton, N J, Princeton University Press, 1983. 54～92
    [8] Galimov E M, Carbon isotopes in oil-gas geology[R] . U.S. Department of Commerce, National Technical Information Service, N75-27563, 1975, 395
    [9] Konnerup_Madsen J， Kreulen R, Rose-Hansen J. Stable isotope character istics of hydrocarbon gases in the alkaline Ilimaussaq complex, South Greenland [J] . Bulletin de Mineralogie, 1988, 111∶ 567-576
    [10] Yuen G, Blair N, Des Marais D J，Chang S. Carbon isotope compositio n of low molecular weight hydrocarbons and monocarboxylic acids from Murchi son meteorite[J] . Nature,1984, 307∶ 252～254
    [11] Fuex A N. The use of stable carbon isotopes in hydrocarbon explorati on[J] . Journal of Geochemical Exploration, 1977, 7∶ 155～188
    [12] Schoell M. Wasserstoff-and Kohlenstoff Isotope in organischen Substan zen, Erdolen and Erdgasen[J] . Geologisches Jahrbuch, 1984, D 67∶164
    [13] Jenden P D， Kaplan I R. Origin of natural gas in the Sacramento basin, California[J] . American Association of Petroleum Geologists Bulletin, 1 989, 73∶ 431～453
    [14] Des Marais D J, Stallard M L, Nehring N L， Truesdell A H. Carbon iso tope geochemistry of hydrocarbons in the Cerro Prieto geothermal field, Baja Cal ifornia Norte, Mexico[J] . Chemical Geology, 1988, 71∶ 159～167.
    [15] James A T, Burns B J. Microbial alteration of subsurface natura l gas accumulations[J] . American Association of Petroleum Geologists Bulletin, 1984, 68∶ 957～960.
    [16] 郭占谦，王先彬.松辽盆地非生物成因气的探讨[J] .中国科学，1994，3：30 3～309.
    [17] Jenden P D, Hilton D R, Kaplan I R, Craig H. Abiogenic hydroca rbons and mantle helium in oil and gas fields[A] , In： David G H， et al， eds . The Future of Energy Gases[C] . 1994. 31～56.
    [18] 戴金星. 天然气碳氢同位素特征和各类天然气鉴别[J] . 天然气地球科学，19 93，(2)∶1～40.
    [19] 徐永昌. 天然气成因理论及应用[M] . 北京：科学出版社，1994.84～101
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出版历程
  • 收稿日期:  1998-11-12
  • 刊出日期:  1999-06-10

目录

    甲烷及其同系物δ13C值反序排列特征的数值模拟与非生物成因天然气藏探讨

    • 中国科学院兰州地质研究所气体地球化学国家重点实验室
      • 基金项目:  国家自然科学基金
      作者简介:

      李春园,男,1964年出生,博士,研究员,地球化学

    • 收稿日期: 1998-11-12
    • 刊出日期: 1999-06-10

    • 中图分类号: P593;P618.13

    摘要: 本文采用数值模拟的方法对天然气中甲烷及其同系物的δ13C排序特征进行了研究,结果表明:两种具正序分布特征的生物成因天然气混合后可产生具反序分布特征的天然气.相应地,两种具反序分布特征的非生物成因天然气混合后也可产生具正序分布特征的天然气.对于前者而言,作为混合的两个端元天然气,它们必须具有不同的成因或来源,或它们是明显不同的演化阶段的产物.关于松辽盆地昌德气藏若干口天然气井甲、乙、丙、丁烷碳同位素排序特征的讨论表明,用两种生物成因天然气混合的观点很难解释这种反序排列.

    English Abstract

    李春园, 王先彬, 夏新宇. 甲烷及其同系物δ13C值反序排列特征的数值模拟与非生物成因天然气藏探讨[J]. 沉积学报, 1999, 17(2): 306-311.
    引用本文: 李春园, 王先彬, 夏新宇. 甲烷及其同系物δ13C值反序排列特征的数值模拟与非生物成因天然气藏探讨[J]. 沉积学报, 1999, 17(2): 306-311.
    shu
    LI Chun yuan, WANG Xian bin, XIA Xin yu. The Possibility and Explanation of Complete Reverse Isotopi c Distribution of Light Hydrocarbons in Natural Gas[J]. Acta Sedimentologica Sinica, 1999, 17(2): 306-311.
    Citation: LI Chun yuan, WANG Xian bin, XIA Xin yu. The Possibility and Explanation of Complete Reverse Isotopi c Distribution of Light Hydrocarbons in Natural Gas[J]. Acta Sedimentologica Sinica, 1999, 17(2): 306-311.
    shu

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