压裂返排液中瓜胶浓度检测及分子结构解析

斯绍雄; 张珍珠; 王雨; 郭进周; 吴永花; 宫兆波

doi:10.3969/j.issn.1001-5620.2018.05.022

压裂返排液中瓜胶浓度检测及分子结构解析

doi: 10.3969/j.issn.1001-5620.2018.05.022

斯绍雄^1,2,
张珍珠^1,2,
王雨^1,2,
郭进周^1,2,
吴永花^1,2,
宫兆波^1,2

1. 新疆砾岩油藏实验室, 新疆克拉玛依 834000;
2. 新疆油田实验检测研究院, 新疆克拉玛依 834000

详细信息

作者简介:
斯绍雄,工程师,1988年生,毕业于四川大学应用化学专业,现在从事压裂返排液研究工作。电话(0990)6868311;E-mail:sishaoxiong@126.com。

中图分类号: TE357.12
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出版历程
- 收稿日期: 2018-07-25
- 刊出日期: 2018-09-30

Concentration Detection and Molecular Structure Identifcation of Guar Gum in Fracturing Flowback Fluids

1. Xinjiang Laboratory of Petroleum Reserve in Conglomerate, Karamay 834000;
2. Experimental Detection Research Institute, Xinjiang Oilfeld Company, Karamay 834000

摘要

摘要: 压裂返排液中的主要成分是瓜胶，其有效含量的确定以及分子结构的变化对于返排液后续的处理具有指导作用。利用瓜胶的化学性质建立了采用蒽酮比色法检测返排液中瓜胶浓度的方法，建立的标准曲线线性相关性为0.999 2，回收率在96.5%～101.1%之间，方法重现性高，准确可靠。同时利用凝胶色谱（GPC）与飞行时间质谱联用的技术（LC/Q-TOF-MS）解析了压裂返排液中瓜胶的分子量和分子结构的变化过程。结果表明，凝胶色谱测量瓜胶分子量的标准曲线线性相关性为0.995 5，玛湖地区使用的瓜胶的相对分子质量约为84万，随返排时间的增加返排液中大分子瓜胶显著减少，加入氧化破胶剂后瓜胶的B-O键优先断裂，瓜胶生成聚二醇络合物。
- 压裂返排液 /
- 瓜胶 /
- 含量 /
- 分子量变化 /
- 结构解析
Abstract: The main component in fracturing flowback fluids is guar gum, the detection of its effective content and the change of its molecular structure are of importance in subsequent treatment of the flowback fluids. Based on the chemical properties of guar gum, anthrone colorimetry has been selected for use in detecting the concentration of guar gum in fracturing flowback fluids. The linear correlation coeffcient of the standard curve established is 0.999 2, and the percent recovery is between 96.5% and 101.1%. This method has a high repeatability and is accurate and reliable. Using GPC and LC/Q-TOF-MS method, the changing of the molecular weight and molecular structure of the guar gum in the fracturing flowback fluid was identifed. It was found that the standard curve linear correlation coeffcient of using GPC to measure the molecular weight of guar gum was 0.995 5. The relative molecular weight of the guar gum used in Mahu area was about 840,000, and the content of the high molecular weight guar gum in the flowback fluids was decreasing obviously with time. The B-O bond in the molecules of guar gum can be broken preferentially by adding oxidizing gel breaker, and the guar gum is then turned into PEG complex.
- Fracturing flowback fluid /
- Guar gum /
- Content /
- Change of molecular weight /
- Structure identifcation

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参考文献(22)

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压裂返排液中瓜胶浓度检测及分子结构解析

doi: 10.3969/j.issn.1001-5620.2018.05.022

作者简介:
斯绍雄,工程师,1988年生,毕业于四川大学应用化学专业,现在从事压裂返排液研究工作。电话(0990)6868311;E-mail:sishaoxiong@126.com。

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Concentration Detection and Molecular Structure Identifcation of Guar Gum in Fracturing Flowback Fluids

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留言板

压裂返排液中瓜胶浓度检测及分子结构解析

doi: 10.3969/j.issn.1001-5620.2018.05.022

作者简介: 斯绍雄,工程师,1988年生,毕业于四川大学应用化学专业,现在从事压裂返排液研究工作。电话(0990)6868311;E-mail:sishaoxiong@126.com。

计量

出版历程

Concentration Detection and Molecular Structure Identifcation of Guar Gum in Fracturing Flowback Fluids

计量

出版历程

目录

作者简介:
斯绍雄,工程师,1988年生,毕业于四川大学应用化学专业,现在从事压裂返排液研究工作。电话(0990)6868311;E-mail:sishaoxiong@126.com。