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Fractionation Mechanism of Natural Gas Components and  Isotopic Compositions and Sample Analysis

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  • 1. China University of Mining and Technology(Beijing),Beijing 100083,China;
    2.Research Institute of Geological Sciences of Shengli Oil Field, Dongying 257015, China;
    3.Petroleum University of China (Huadong), Dongying 257062,China

Received date: 2010-09-08

  Revised date: 2011-11-29

  Online published: 2011-04-10

Abstract

Hydrocarbon component and isotope composition would be fractioned during the generation, immigration and conservation of natural gas. During the generation of natural gas, the fractionation effect is caused by the activating energy difference of base groups which could break off from parent materials and translate into hydrocarbon gas. At low maturity stage, base groups with low activating energy could break off and translate into hydrocarbon gases with light isotopic. At high maturity stage, base groups with high activating energy translated into hydrocarbon gases with weight isotopic similar to parent material. During the immigration of natural gas, the fractionation effect is caused by the differences of dissolution, adsorption and diffusion abilities among different components or same component with different isotopic molecules, corresponding to dissolving, dissociating and diffusing immigration models respectively. Microbial degradation is an important fractionation cause of natural gas in gas reservoirs. Microbial degradation process is controlled by the microbial types and kinetics mechanism. Samples of gas reservoirs with the fractionation effects of natural gas during immigration and conservation are given.

Cite this article

LIN Hui-Xi, CHENG Fu-Qi, JIN Qiang . Fractionation Mechanism of Natural Gas Components and  Isotopic Compositions and Sample Analysis[J]. Natural Gas Geoscience, 2011 , 22(2) : 195 -200 . DOI: 10.11764/j.issn.1672-1926.2011.02.195

References

[1]Galimov E  M.Sources and mechanisms of formation of gaseous hydrocarbons in sedimentary rocks[J].Chemical Geology,1988,71:77-95.
[2]Shen Ping,Xu Yongchang,Wang Xianbing,et al.Studies on Geochemical Characteristics of Gas-source Rock and Natural Gas and Mechanism of Genesis of Gas[M].Lanzhou:Gansu Science and Technology Press,1991.[沈平,徐永昌,王先彬,等.气源岩和天然气地球化学特征及成气机理研究[M].兰州:甘肃科学技术出版社,1991.]
[3]Dai Jinxing,Pei Xigu,Qi Houfa.Natural Gas Geology of China:Series 1[M].Beijing:Petroleum Industry Press,1992.[戴金星,裴锡古,戚厚发.中国天然气地质:卷一[M].北京:石油工业出版社,1992.]
[4]Whiticar M J.Correlation of Natural Gases with their Sources[M]//Magoon B,Don W G.The Petroleum System from Source to Trap.AAPG Memoir 60,1993:261-284.
[5]Xu Yongchang.Genetic Theory of Natural Gas and It’s Application[M].Beijing:Science Press,1994.[徐永昌.天然气成因理论及应用[M].北京:科学出版社,1994.][6]Chen Jianfa,Shen Ping,Huang Baojia,et al.Application of contents of chemical components and isotopic composition of oil-gas to research on the secondary migration of Ying-qiong basin in China[J].Journal of the University of Petroleum,China,2000,24(4):91-94.[陈践发,沈平,黄保家,等. 油气组分及同位素组成特征在莺琼盆地油气二次运移研究中的应用[J].石油大学学报:自然科学版,2000,24(4):91-94.]
[7]Liu Wenhui,Zheng Jianjing,Guan Ping,et al.Three-end-members Geochemical Tracing System of Natural Gas Generated and Reservoiring and Its Application[M].Lanzhou:Gansu Science and Technology Press,2009.[刘文汇,郑建京,关平,等.天然气成烃、成藏三元地球化学示踪体系及实践[M].兰州:甘肃科学技术出版社,2009.]
[8]Cheng Fuqi,Jin Qiang.Composition and isotope fractionations of accumulated natural gas and their significance[J].Natural Gas Geoscience,2005,16(4):522-525.[程付启,金强.成藏后天然气组分与同位素的分馏效应研究[J].天然气地球科学,2005,16(4):522-525.]
[9]Cheng Fuqi,Jin Qiang,Lin Huixi,et al.Dissolution fractionation model of natural gas components and its application[J].Geological Journal of China Universities,2008,14(1):120-125.[程付启,金强,林会喜,等.天然气溶解过程中组分分馏模型及其应用[J].高校地质学报,2008,14(1):120-125.]
[10]Clayton  C.Carbon isotope fractionation during natural gas generation from kerogen[J].Marine and Petroleum Geology,1991,8:232-240.
[11]Cramer  B ,Krooss B M,Littke R .Modelling isotope fractionation during primary cracking of natural gas:A reaction kinetic approach[J].Chemical Geology,1998,149:235-250.
[12]Liu Wenhui,Xu Yongchang. A two-stage model of carbon isotopic fractionation in coal-gas[J].Geochemistry,1999,28(4):359-365.[刘文汇,徐永昌.煤型气碳同位素演化二阶段分馏模式及机理[J].地球化学,1999,28(4):359-365.]
[13]Patience  R L.Where did all the coal gas go?[J]. Organic Geochemistry,2003,34:375-387.
[14]Lorant F,Prinzhofer A,Beher F,et al.Carbon isotopic and molecular constraints on the formation and the expulsion of thermogenic hydrocarbon gases[J]. Chemical Geology,1998,147:249-264.
[15]Hao Shisheng,Zhang Zhengying.The characteristic of the solubility of natural gas in formation waters and it’s geological significance[J].Acta Petrolei Sinica,1993,14(2):12-21.[郝石生,张振英.天然气在地层水中的溶解度变化特征及地质意义[J].石油学报,1993,14(2):12-21.]
[16]Qin Shengfei,Tang Xiuyi,Song Yan,et al.Distribution characteristics and fractionation mechanism of carbon isotopic of methane in coal formation[J].Science in China:Series D,2006,26(12):1092-1097.[秦胜飞,唐修义,宋岩,等.煤层甲烷碳同位素分布特征及分馏机理[J].中国科学:D辑,2006,26(12):1092-1097.]
[17]Hao Shisheng,Chen Zhangming,Gao Yaobin,et al.Formation and Conservation of Natural Gas Reservoirs[M].Beijing:Petroleum Industry Press,1995.[郝石生,陈章明,高耀斌,等.天然气藏的形成和保存[M].北京:石油工业出版社,1995].
[18]Li Mingcheng.Immigration of Oil and Gas[M].Beijing:Petroleum Industry Press,2004.[李明诚.石油与天然气运移[M].北京:石油工业出版社,2004.]
[19]Ardles R M.Petroleum Microbial[M]//Huang Difan,Translate.Beijing:Petroleum Industry Press,1991.[阿特拉斯R  M.石油微生物学[M].黄第藩,译.北京:石油工业出版社,1991.]
[20]James  A T,Burns B J.Microbial ateration of subsurface natural gas accumulations[J].AAPG Bulletin,1984,68(8):957-960.
[21]Zhang Tongwei,Wang Xianbing,Chen Jianfa,et al.Chemical composition of gases as a geochemical tracer of natural gas migration[J].Acta Sedimentologica Sinica,1999,17(4):627-631.[张同伟,王先彬,陈践发,等.天然气运移的气体组分的地球化学示踪[J].沉积学报,1999,17(4):627-631.]
[22]Cheng Fuqi,Jin Qiang,Liu Wenhui,et al.Formation of source-mixed gas reservoir in Ordovician weathering crust in the central gas-field of Ordos basin[J].Acta Petrolei Sinica,2007,28(1):38-42.[程付启,金强,刘文汇,等.鄂尔多斯盆地中部气田混源气成藏特征分析[J].石油学报,2007,28(1):38-42.]
[23]Qin Shengfei,Jia Chengzao,Li Mei.The difference in geochemical characteristics of natural gases between eastern and western parts in Hetianhe gas field of Tarim basin and its origin[J].Petroleum Exploration and Development,2002,29(5):16-18.[秦胜飞,贾承造,李梅.和田河气田天然气东西差异及原因[J].石油勘探与开发,2002,29(5):16-18.][24]Schoell  M.Multiple origins of methane on the earth[J].Chemical Geology,1988,71:1-10.
[25]Zhang Linye,Li Juyuan,Li Xiangcheng,et al.Light hydrocarbon con stituents of the biodegration gas and gas-source correlation[J].Experimental Petroleum Geology,1996,18(1):88-96.[张林晔,李钜源,李祥臣,等.细菌降解气轻烃组成及气源对比[J].石油实验地质,1996,18(1):88-96.]
[26][JP2]Pan Xianzhuang,Zhang Guohua,Huang Baojia,et al.Biodegradation and mixed sources of shallow gasfields in Yinggehai basin[J].China Offshore Oil and Gas,2002,16(3):189-195.[潘贤庄,张国华,黄保家,等.莺歌海盆地浅层天然气生物降解及混源特征[J].中国海上油气:地质,2002,16(3):189-195.]

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