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An Isotopic Geochemistry Approach on the Identification of Gas Sources of Two Wells in Tarim Basin[J]. Acta Sedimentologica Sinica, 1996, 14(S1): 214-219.
Citation: An Isotopic Geochemistry Approach on the Identification of Gas Sources of Two Wells in Tarim Basin[J]. Acta Sedimentologica Sinica, 1996, 14(S1): 214-219.

An Isotopic Geochemistry Approach on the Identification of Gas Sources of Two Wells in Tarim Basin

  • Received Date: 1995-09-23
  • Publish Date: 1996-12-31
  • Plenty of geochemical analyses were carried out on natural gas, oil and condensate samples collected from two wells in Tarim Basin and results were employed in interpreting their sources and distinguishing one from the other. The chemical compositions of gases from the both wells showed that they are of oilfied associated gas with a low dry coeffieient. Their carbon isotopic compositions might indicate a mixture of gas sources, and the input of the mantle-derived materials was denied by the isotopic parameters of noble gases, such as 3 He4He and4 He/20Ne ratios. The age of gases from these two wells was identified to be the Palaeozoic by the 40Ar/36Ar ratio.
  • [1] 1.Bjoroy M, et al. Stable carbon isotope ratio analysis on single components in crude oils by direct GC-isotope analysis.Trends in Analystical Chemistry. 1990. 9: 331一336.

    2.Dai Jin Xing. General theory on the origin of the reversed order of carbon isotopes of alkane gases. Industry of Natrual gas. 1990. 10 (6).

    3.Freeman K H. et al. Evidence from carbon isotope measurements for diverse origins of sedimentary hydrocarbons. Na-lure. 1990, 343: 254-256.

    4.Hayes J M, et al. Isotopic compositions and probable origins of organic molecules in the Eocene Messel shale. Nature.1987. 329 : 48-51.

    5.Hayes J M. et al. Compound-specific analysis: A novel tool for reconstruction oI ancient biogeochemical processes. Org.Geochem.,1990.16: 115-1128.

    6.Lapton J E. Terrestrial inert gases isotope tracer studies and clues to primordial components in the mantle. Ann. Rev.Earth. Planet. Sri.,1983. 11:371-414.

    7.Schoell M. The hydrogen and carbon isotopic composition of methane from natural gases of various origins. Geochimicaet Comochimica Acta. 1980. 44 (5).

    8.Sofer I. et al. Isotopic composition of individual n-alkanes in oils. Org. Geochem.,1992. 18: 201-222.

    9.Susumn Sakata, et al. Geochemical study on genesis of natural gases accumulated in deep volcaniclastic rocks: Journalof the Japanese Association for Petroleum Technology. 1986. 51 (3):33-41.

    10.Xu Yongchang. et al. Isotopic geochemistry of noble gases from natural gases. Geochimica. 1979. (4):271-282.

    11.Zhang Wenzheng. et al. Study on carbon isotopes of individual light hydrocarbons and n-alkane compounds form sever-al basins in China. Review of Geology. 1993. 39 (1):79-85.

    12.Zhao Mengjun. et al. Study on carbon isotopic compositions of individual hydrocarbon compounds in crude oils. Explo-ration and Exploitation of Petroleum. 1994. (3):52-59.
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  • Received:  1995-09-23
  • Published:  1996-12-31

An Isotopic Geochemistry Approach on the Identification of Gas Sources of Two Wells in Tarim Basin

Abstract: Plenty of geochemical analyses were carried out on natural gas, oil and condensate samples collected from two wells in Tarim Basin and results were employed in interpreting their sources and distinguishing one from the other. The chemical compositions of gases from the both wells showed that they are of oilfied associated gas with a low dry coeffieient. Their carbon isotopic compositions might indicate a mixture of gas sources, and the input of the mantle-derived materials was denied by the isotopic parameters of noble gases, such as 3 He4He and4 He/20Ne ratios. The age of gases from these two wells was identified to be the Palaeozoic by the 40Ar/36Ar ratio.

An Isotopic Geochemistry Approach on the Identification of Gas Sources of Two Wells in Tarim Basin[J]. Acta Sedimentologica Sinica, 1996, 14(S1): 214-219.
Citation: An Isotopic Geochemistry Approach on the Identification of Gas Sources of Two Wells in Tarim Basin[J]. Acta Sedimentologica Sinica, 1996, 14(S1): 214-219.
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