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Article Navigation >  Acta Sedimentologica Sinica  > 1993  >  11(4): 42-46

Long Daojiang, Yan Liecan, Du Jianguo. Orign and Characteristics of Natural Gas in Taibei Seg of Turpan - Kami Basin[J]. Acta Sedimentologica Sinica, 1993, 11(4): 42-46.
Citation: Long Daojiang, Yan Liecan, Du Jianguo. Orign and Characteristics of Natural Gas in Taibei Seg of Turpan - Kami Basin[J]. Acta Sedimentologica Sinica, 1993, 11(4): 42-46.
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Orign and Characteristics of Natural Gas in Taibei Seg of Turpan - Kami Basin

  • 1.

    Turpan -Hami Bureau of Oil exploration and Development, Sansan County 838202, Xinjiang Uygur Autoomous Region, P.R.China;

  • 2.

    Lanzhou Institute of Geology. Chinese Academy of Sciences, Lanzhou 730000, P. R.China

  • Publish Date: 1993-12-10
  • Origin of gaseous hydrocarbon is discussed on the basis of geochemical characteristics of natural gas in Taibei depression of the Turpan -Hami Basin, Northwestern China. More than 10 gas samples were collected from the production wells. Molecular composition and carbon, hydrogen and helium isotope composition of natural gas were analyzed. The gases contain 60. 85 - 84. 40% mathane and 13. 04-38. 76% heavy hydrocarbons (Cu2+). Values of wetness (C1/C2+) are between 1. 57 to 6. 37. The gases are isotopically characterized by δ18C1 = -43. 0～-49. 4‰, δDc1 = - 220～-271‰, δ18C2 = -20.1～-34. 0‰. δDc2= -259～-257‰. δ18C3= -21.3～-26. 7‰, δDc3= -114～-203‰, δ18C4= -22. 2～-28. 2‰, δDc4 =-93～-116‰, and 3He/4He = (3. 17-7. 01)×10-6. Estimated maturity of natural gas is different from that of Jurassic sediment organic matter. Based on the carbon isotope composition of mathane, ethane and propane, values of vit-rinite reflectance (R.) are calculated. The data indicate that natural gas in Taibei depression of the Tuipan -Hami Basin is wet gas, and belongs to thermocatalytical natural gas, that the gases may be generated in different stages, which causes the gases have larger △13C2-1 values, and that the gases may be partially derived from Jurassic System, and partially from Pre - jurassic strata.
  • [1] 沈平等.1991.气源岩和天然气地球化学特征及成气机理研究，兰州:甘肃科学技术出版社.
    [2] 杜建国和涂永昌.1990.三水盆地烃类天然气同位素待征及其成因，石油与天然气地质，11卷3期.298-303页.
    [3] 赵文智、李伟、燕烈灿，1991，吐鲁番-哈密盆地油气截类型，特征与油气分布规律初探，石油与夭然气地质.12卷4期，351-362页。
    [4] Berper U.& Faber E.，1988. Maturity ralated mixing model for methane, ethane propane，based on carbon isotopes. Org.Geochem. V.13，N.1-3. p. 67-72.
    [5] Du Jiangun &. Liu Wrnhui，1991，hotpic gochemistry of nohydrucarbons。nnturnl gas from Samshun Basin Gangdong prov nce. Chinese J. Geochem.，V. 10.N.4，p. 318-325.
    [6] Du J.,1992.3He/4He ratios and heat flow in the continental reft-vally. Eastern China，Chinese J. Geochem.,V.11.N.3. p. 237-243.

    Shoell M. . 1983, Genetic characterization of natural gases. AAPG Bull?V. 67. V. 12，p. 2225-2238.
    [7] Stahl W.，1977. Carbon and nitrogen isotopes in hydrocarbon research and ezploration. Chem. Geol.，V. 20. p. 121-149.
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  • Published:  1993-12-10

Orign and Characteristics of Natural Gas in Taibei Seg of Turpan - Kami Basin

  • 1. Turpan -Hami Bureau of Oil exploration and Development, Sansan County 838202, Xinjiang Uygur Autoomous Region, P.R.China;
  • 2. Lanzhou Institute of Geology. Chinese Academy of Sciences, Lanzhou 730000, P. R.China
  • Publish Date: 1993-12-10

Abstract: Origin of gaseous hydrocarbon is discussed on the basis of geochemical characteristics of natural gas in Taibei depression of the Turpan -Hami Basin, Northwestern China. More than 10 gas samples were collected from the production wells. Molecular composition and carbon, hydrogen and helium isotope composition of natural gas were analyzed. The gases contain 60. 85 - 84. 40% mathane and 13. 04-38. 76% heavy hydrocarbons (Cu2+). Values of wetness (C1/C2+) are between 1. 57 to 6. 37. The gases are isotopically characterized by δ18C1 = -43. 0～-49. 4‰, δDc1 = - 220～-271‰, δ18C2 = -20.1～-34. 0‰. δDc2= -259～-257‰. δ18C3= -21.3～-26. 7‰, δDc3= -114～-203‰, δ18C4= -22. 2～-28. 2‰, δDc4 =-93～-116‰, and 3He/4He = (3. 17-7. 01)×10-6. Estimated maturity of natural gas is different from that of Jurassic sediment organic matter. Based on the carbon isotope composition of mathane, ethane and propane, values of vit-rinite reflectance (R.) are calculated. The data indicate that natural gas in Taibei depression of the Tuipan -Hami Basin is wet gas, and belongs to thermocatalytical natural gas, that the gases may be generated in different stages, which causes the gases have larger △13C2-1 values, and that the gases may be partially derived from Jurassic System, and partially from Pre - jurassic strata.

Long Daojiang, Yan Liecan, Du Jianguo. Orign and Characteristics of Natural Gas in Taibei Seg of Turpan - Kami Basin[J]. Acta Sedimentologica Sinica, 1993, 11(4): 42-46.
Citation: Long Daojiang, Yan Liecan, Du Jianguo. Orign and Characteristics of Natural Gas in Taibei Seg of Turpan - Kami Basin[J]. Acta Sedimentologica Sinica, 1993, 11(4): 42-46.
shu

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