利用气相色谱指纹技术判识火驱燃烧状态——以杜66块为例
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闫红星(1987—),男,河北沧州人,硕士,从事有机地球化学与油藏地球化学的分析研究工作。E-mail:yanhongxing87@126.com。

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国家科技重大专项“大型油气田及煤层气开发”子课题“辽河、新疆稠油/超稠油开发技术示范工程”(2016ZX05055)。


Using gas chromatographic fingerprint technique to identify combustion state during fire flooding:A case study of Du66 Block
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    摘要:

    为认清杜66块火驱开发过程中的地下燃烧状态,建立判识火驱燃烧状态的新方法,优选出3口生产井开展了长达5 a的原油及尾气的跟踪监测,利用原油气相色谱指纹技术与尾气多维气相色谱技术,研究生产现场火驱高温氧化的原油与尾气指纹特征参数。结果表明:火驱生产现场发生高温氧化后,原油正构烷烃色谱指纹呈现主峰碳前移、轻重比增加并伴随轻烃、异构烷烃、正构烷烃含量增加的特征;类异戊二烯烃色谱指纹特征表现为Ph/nC17和Pr/nC18值降低,iC21与nC19呈近水平或前低后高型分布;尾气中氧气转化率、视氢碳原子比、二氧化碳含量的综合运用是指示火驱高温氧化的有效参数,并且在尾气多维色谱指纹图中出现了烯烃、氢气等裂解组分。

    Abstract:

    To understand the underground combustion state during the fire flooding development of Du66 Block,we worked out a new method to identify the combustion state during fire flooding. Three production wells were selected to carry out the follow-up monitoring of crude oil and tail gas for five years. The gas chromatographic fingerprint technique of crude oil and the multi-dimensional gas chromatographic technique of tail gas were used to study the fingerprint characteristics and parameters of crude oil and tail gas of high-temperature oxidation during fire flooding in the production field. The results show that the chromatographic fingerprint of n-alkanes of crude oil is featured by forward main peak carbon,higher lighttoheavy ratio,increased content of light hydrocarbons,isoparaffins,and n-alkanes after high-temperature oxidation in the fire flooding production site. The chromatographic fingerprint of isoprenoid hydrocarbons shows reduced Ph/nC17 and Pr/nC18;the content of iC21 is nearly the same as or less than that of nC19. Oxygen conversion,apparent hydrogen-to-carbon atomic ratio,and carbon-dioxide content in tail gas are effective parameters for the high-temperature oxidation of fire flooding.In addition,cracked components such as olefins and hydrogen appear in the multi-dimensional chromatographic fingerprint of tail gas.

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闫红星,杨俊印,刘家林,姜文瑞,杨鹏成,孙倩.利用气相色谱指纹技术判识火驱燃烧状态——以杜66块为例[J].油气地质与采收率,2021,28(6):87~93

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  • 在线发布日期: 2022-01-20