Stable Carbon Isotope Compositions of Gaseous Hydrocarbons in Pyrolysis Experiment and Geochemical Significance

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  • 1.Research and Development Center of Tuha Oilfield Company,Shanshan 838202,China;
    2.Key Laboratory of Oil & Gas Resources and Exploration Technology,Ministry of Education,Departmentof Geochemistry,Yangtze University,Jingzhou 434023,China;
    3.No.113 Exploration Team,Guizhou Bureau of Coalfield Geological Exploration,Guiyang 550023,China

Received date: 2009-10-23

  Revised date: 2010-03-16

  Online published: 2010-12-10

Abstract

In this paper,different types of samples,including crude oil,chloroform bitumen A,oil fractions (saturated hydrocarbon,aromatic hydrocarbon and asphaltene),source rock and kerogen,were performed in pyrolysis experiment at high temperature.Carbon isotope composition of gaseous hydrocarbons was measured.With increase of pyrolysis temperatures,δ13C values of gaseous hydrocarbons from different types of samples (i.e crude oil,chloroform bitumen A,kerogen,source rock,and saturated hydrocarbon) were various,with heavy value of  13C at low temperature,lighter value at moderate temperature,and heavier value at higher pyrolysis temperature.A normal serial of stable carbon isotopes for methane,ethane and propane occurred before pyrolysis temperature less than 700℃.But,reverse trend happened at pyrolysis temperature more than 750℃.The different change of stable carbon isotope values and normal serial for gaseous hydrocarbons from aromatic hydrocarbon and asphaltene existed.Δδ13C2-1 values for gaseous hydrocarbon from all samples increased with pyrolysis temperature increasing.Values of  Δδ13C3-1and Δδ13C3-2 were various for samples.A position correlation between δ13C2—δ13C3 and Ln(C2/C3)occurred with pyrolysis temperature increasing.

Cite this article

TANG Xiao-Qiang, HUANG Guang-Hui, ZHANG Min, CHEN Chao, HAN Jin-Ping, WU Di, ZHOU Xiao-Song . Stable Carbon Isotope Compositions of Gaseous Hydrocarbons in Pyrolysis Experiment and Geochemical Significance[J]. Natural Gas Geoscience, 2010 , 21(6) : 1029 -1035 . DOI: 10.11764/j.issn.1672-1926.2010.06.1029

References

[1]Stahl W J,Carey Jr B D.Source-rock identification by isotope analyses of natural gases from fields in the Val Verde and Delaware basins[J].West Taxas.Chemical Geology,1975,16(4):257-267.
[2]Tang Xiaoqiang,Huang Guanghui,Zhang Min,et al.Composition characteristics and geochemical significance of  n-alkanes in the process of cracking of crude oil[J].Earth Sicence Frontiers,2009,10(6):372-378.
[3]Schoell M.The hydrogen and carbon isotope composition of methane from natural gases of various origins[J].Geochim Cosmochim Acta,1980,44(5):649-661.
[4]Dai Jinxing,Qi Houfa.δ13C1—RO relationship of coal-formed hydrocarbon gas in China[J].Chinese Science Bulletin,1989,34(9):690-692.[戴金星,戚厚发.我国煤成烃气的δ13C1—RO关系[J].科学通报1989,34(9):690-692.]
[5]Dai Jinxing,Pei Xigu,Qi Houfa,et al.Geological Study on China′s Natural Gas:Volume 1[M].Beijing: Publishing House of Oil Industry,1992:35-46.[戴金星,裴锡古,戚厚发,等.中国天然气地质学:卷一[M].北京:石油工业出版社,1992:35-46.]
[6]Shen Ping,Xu Yongchang,Wang Xianbin,et al.Geochemical and Genetic Mechanism Study on Gas Source Rock and Gas[M].Lanzhou:Publishing House of Science and Technology in Ganshu,1991:43-52.[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,1991:43-52.]
[7]Chen Anding,Zhang Wenzheng,Xu Yongchang.The isotopic characteristics and apply in products in simulation experiment of hydrocarbon generation for sedimentary rock[J].Science in China:Series B,1993,23(2):209-217.[陈安定,张文正,徐永昌.沉积岩成烃模拟实验产物的同位素特征及应用[J].中国科学:B辑,1993,23(2):209-217.]
[8]Zou Yanrong,Shuai Yanhua,Kong Feng,et al.Mathematic models of stable carbon Isotope composition of coal-derived methane and their applications[J].Natural Gas Geoscience,2003,14(2):92-96.[邹艳荣,帅燕华,孔枫,等.煤成甲烷碳同位素演化的数学模型与应用[J].天然气地球科学,2003,14(2):92-96.]
[9]Li Jian,Liu Zhaolu,Li Zhisheng,et al.Experiment investigation on the carbon isotope and composition fractionation of methane during gas migration by diffusion[J].Natural Gas Geoscience,2003,14(6):463-468.[李剑,刘朝露,李志生,等.天然气组分及其碳同位素扩散分馏作用模拟实验研究[J].天然气地球科学,2003,14(6):463-468.]
[10]Wang Wanchun,Liu Wenhui,Liu Quanyou.Analyses of the carbon isotopic geochemistry of the mix-sourced shallow reservoir natural gas identification[J].Natural Gas Geoscience,[HJ1.5mm]2003,14(6):469-473.[王万春,刘文汇,刘全有.浅层混源天然气判识的碳同位素地球化学分析[J].天然气地球科学,2003,14(6):469-473.]
[11]Wang Qiang,Fu Xiaowen,Xu Zhiming,et al.Development and application of stable carbon iostopes in natural gas and oil[J].Natural Gas Geoscience,2005,16(2):233-237.[王强,付晓文,徐志明,等.稳定碳同位素在油气地球化学中的应用及存在的问题[J].天然气地球科学,2005,16(2):233-237.]
[12]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.]
[13]Feng Zihui,Chi Yuanlin,Du Hongwen,et al.Carbon isotopic composition and yield of gaseous hydrocarbon by oil hydrous pyrolysis in rock medium[J].Acta Sedimentologica Sinica,2002,20(3):505-509.[冯子辉,迟元林,杜洪文,等.原油在储层介质中的加水裂解生气模拟实验[J].沉积学报,2002,20(3):505-509.]
[14]Dai Jinxing.The carbon isotopic composition and genetic types of gas from Liuhuangtang Tengchong county,Yunnan Province[J].Chinese Science Bulletin,1988,33(15):1168-1170.[戴金星.云南省腾冲县硫磺塘天然气碳同位素组成特征和成因[J].科学通报,1988,33(15):1168-1170.]
[15]Zheng Jianjing,Ji Liming,Meng Qianxiang.Thermal simulation research of partial opposites sequence of carbon isotope and ethane carbon isotope of gases[J].Acta Sedimentologica Sinica,1999,17(supplement 1):811-814.[郑建京,吉利明,孟仟祥.天然气碳同位素部分反序与乙烷碳同位素特征的模拟研究[J].沉积学报,1999,17(增刊1):811-814.]
[16]Feng Zihui,Ren Yanguang,Wang Cheng,et al.Study on inclusion of deep buried igeous resrvoir and foming period of gas pool in Songliao basin[J].Natural Gas Geoscience,2003,(6):436-442.[冯子辉,任延广,王成,等.松辽盆地深层火山岩储层包裹体及天然气成藏期研究[J].天然气地球科学,2003,(6):436-442.]
[17]Dai Jinxing,Xia Xinyu,Qin Shengfei,et al.Causation of partly reversed orders δ13C of in blogenic alkane gas in China[J].Oil & Gas Geology,2003,24(1):1-6,11.[戴金星,夏新宇,秦胜飞,等.中国有机烷烃气碳同位素系列倒转的成因[J].石油与天然气地质,2003,24(1):1-6,11.]
[18]Yang Chun,Liu Quanyou,Zhou Qinghua,et al.Genetic identification of natural gases in Qingshen gas field,Songliao basin[J].Earth Science:Journal of China University of Geosciences,2009,34(5):792-798.[杨春,刘全有,周庆华,等.松辽盆地庆深气田天然气成因类型鉴别[J].地球科学:中国地质大学学报,2009,34(5):792-798.]
[20]Chen Shijia,Huang Difan,Zhao Mengjun.Identifying oil and gas intervals using saturated hydrocarbon chromatography fingerprints of reservoir extracted hydrocarbon[J].Acta Sedimentologica Sinica,1998,16(4):12-16.[陈世加,黄第藩,赵孟军.用储层岩石抽提物的饱和烃色谱指纹识别油气层[J].沉积学报,1998,16(4):12-16.][21]Chen Shijia,Fu Xiaowen,Ma Lining,et al.Genetic discrimination of marine sapropelic type gas in Tarim basin[J].Oil & Gas Geology,2001,22(2):100-118.[陈世加,付晓文,马力宁,等.塔里木盆地海相腐泥型天然气的成因辩识[J].石油与天然气地质,2001,22(2):100-118.]
[22]Zhao Mengjun,Zeng Fangang,Qin Shengfei.Two pyrolytic gases found and proved in Talimu basin[J].Natural Gas Industry,2001,21(1):35-38.[赵孟军,曾凡刚,秦胜飞,等.塔里木发现和证实两种裂解气[J].天然气工业,2001,21(1):35-38.]

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