Analysis of Trace Light Hydrocarbon in Natural Gas by an On-line Preconcentration-Gas Chromatography

Cai-ming ZHANG; Jin XU; Qi-gui JIANG; Qu ZHANG

2013 Vol. 32, No. 2

Article Contents

Article navigation > Rock and Mineral Analysis > 2013 > 32(2): 319-324

Next Article Previous Article

Cai-ming ZHANG, Jin XU, Qi-gui JIANG, Qu ZHANG. Analysis of Trace Light Hydrocarbon in Natural Gas by an On-line Preconcentration-Gas Chromatography[J]. Rock and Mineral Analysis, 2013, 32(2): 319-324.

Citation:

Cai-ming ZHANG, Jin XU, Qi-gui JIANG, Qu ZHANG. Analysis of Trace Light Hydrocarbon in Natural Gas by an On-line Preconcentration-Gas Chromatography[J]. Rock and Mineral Analysis, 2013, 32(2): 319-324.

Analysis of Trace Light Hydrocarbon in Natural Gas by an On-line Preconcentration-Gas Chromatography

Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi 214151, China

Received Date: 30 August 2012

Accepted Date: 17 October 2012

Abstract

Abstract

A method for the analysis of high mature natural gas by Gas Chromatography with on-line preconcentration technique is introduced. High mature natural gas with greater than 0.95 of dry coefficient flowed through a self-developed enrichment back-blow device to trap the trace light hydrocarbons. After the back blow of un-liquefied components, the trapped trace light hydrocarbons were gasified and transferred into Gas Chromatography with carrier gas by heating the cold trapped components, which significantly expanded the analysis range of light hydrocarbons according to the results. The light hydrocarbons that were less than C₁₀ were successfully analyzed with this method. The results of three experiments of natural gas in Puguang 7 showed a good reproducibility in indices of methylcyclohexane, n-heptane, iso-heptane and Mango K₁ which were 0.22, 0.23, 0.02 and 0.00, respectively, lower than the national standard, 0.82, 0.75, 0.11 and 0.04. Meanwhile the solvent effect caused by methane has been dramatically reduced. The parameters obtained with this on-line analysis method can be effectively applied to the studies of origin and maturity of natural gas.
- high mature natural gas /
- trace light hydrocarbons /
- Gas Chromatography /
- enrichment /
- blow-back

FullText(HTML)

References

[1]	曹寅,钱志浩,秦建中,陈丽华,王大锐,边立曾.石油地质样品分析测试技术及应用[M].北京:石油工业出版社,2006: 123-133. Google Scholar
[2]	王瑞,李季,蒋启贵,张彩明.气相色谱法定量测定烃源岩中轻烃的含量[J].岩矿测试,2008,27(5): 333-336. Google Scholar
[3]	戴金星,裴锡古,戚厚发.中国天然气地质学(卷一)[M].北京: 石油工业出版社,1992: 75-80. Google Scholar
[4]	Thompson K F M. Light hydrocarbons in subsurface sediments [J]. Geochimica et Cosmochimica Acta, 1979, 43 (5): 657-672. doi: 10.1016/0016-7037(79)90251-5 CrossRef Google Scholar
[5]	Magno F D. An invariance in the isohetanes of petroleum[J]. Science, 1987, 237: 514-517. doi: 10.1126/science.237.4814.514 CrossRef Google Scholar
[6]	张林晔,李钜源,李祥臣,唐洪三.细菌降解气轻烃组成及气源对比[J].石油实验地质,1996,18(1): 88-95. doi: 10.11781/sysydz199601088 CrossRef Google Scholar
[7]	刘光祥,蒋启贵,潘文蕾,蔡立国,吕俊祥.干气中浓缩轻烃分析及应用——以川东北-川东区天然气气/源对比研究为例[J].石油实验地质,2003,25(Z1): 585-589. doi: 10.3969/j.issn.1001-6112.2003.z1.013 CrossRef Google Scholar
[8]	胡国艺,李剑,李瑾,李志生,罗霞,孙庆伍,马成华.判识天然气成因的轻烃指标探讨[J].中国科学:D辑,2007,37(Z2): 111-117. Google Scholar
[9]	Mango F D.The light hydrocarbons in petroleum: A critical review[J]. Organic Geochemistry, 1997, 26(7-8): 417-440. doi: 10.1016/S0146-6380(97)00031-4 CrossRef Google Scholar
[10]	刘昭茜,梅廉夫,郭彤楼,凡元芳,汤济广,沈传波.川东北地区海相碳酸盐岩油气成藏作用及其差异性——以普光、毛坝气藏为例[J].石油勘探与开发,2009,36(5): 552-561. Google Scholar
[11]	马永生,蔡勋育,李国雄.四川盆地普光大型气藏基本特征及成藏富集规律[J].地质学报,2005,79(6): 858-865. Google Scholar
[12]	Thompson K F M. Classification and thermal history of petroleum based on light hydrocarbons[J]. Geochimica et Cosmchimica Acta, 1983, 47(2): 303-316. doi: 10.1016/0016-7037(83)90143-6 CrossRef Google Scholar
[13]	Mango F D. The origin of light cycloalkanes in petroleum: A kinetic test of the steady state catalytic hypothesis[J]. Geochimica et Cosmochimica Acta, 1990, 54: 1315-1323. doi: 10.1016/0016-7037(90)90156-F CrossRef Google Scholar
[14]	朱扬明,张春明.Mango轻烃参数在塔里木原油分类中的应用[J].地球化学,1999,28(1): 26-33. Google Scholar
[15]	胡惕麟,戈葆雄,张义纲,刘斌.源岩吸附烃和天然气轻烃指纹参数的开发和应用[J].石油实验地质,1990,12(4): 375-394. doi: 10.11781/sysydz199004375 CrossRef Google Scholar
[16]	戴金星.利用轻烃鉴别煤成气和油型气[J].石油勘探与开发,1993,20(5): 26-32. Google Scholar
[17]	刘光祥,郑冰,周东升.四川盆地二叠系烃源岩及其资源潜力研究[R].2010: 169-177. Google Scholar
[18]	谢增业,杨威,胡国艺,李志生,孙庆伍.四川盆地天然气轻烃组成特征及其应用[J].天然气地球科学,2007,18(5): 720-725. Google Scholar
[19]	胡国艺,肖中尧,罗霞,李志生,李剑,孙庆武,王春怡.两种裂解气中轻烃组成差异性及其应用[J].天然气工业,2005,25(9): 23-25. Google Scholar
[20]	李艳霞.原油裂解气和干酪根裂解气的判识[J].西安石油大学学报: 自然科学版,2008,23(6): 42-45. Google Scholar
[21]	刘文汇,秦建中,蒋启贵.南方海相烃源转化过程与生气潜力研究[R].2008: 92-100. Google Scholar
[22]	马永生.普光气田天然气地球化学特征及气源探讨[J].天然气地球科学,2008,19(1): 1-7. doi: 10.11764/j.issn.1672-1926.2008.01.1 CrossRef Google Scholar
[23]	秦建中,付小东,腾格尔.川东北宣汉-达县地区三叠-志留系海相优质烃源层评价[J].石油实验地质,2008,30(4): 367-374. doi: 10.11781/sysydz200804367 CrossRef Google Scholar
[24]	腾格尔,刘文汇,秦建中,郑伦举,付小东,申宝剑,卢龙飞,王杰.川东北地区海相深层多源生烃动态转化机制——以普光气田为例[J].岩石学报,2012,28(3): 895-904. Google Scholar
[25]	GB/T 18340.1—2010,地质样品有机地球化学分析方法第1部分: 轻质原油分析气相色谱法[S]. Google Scholar