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压裂用促解吸体系的构建与性能研究

Construction and Performance Study of Desorption-Promoting System for Fracturing

Environment and Resource / 2025,7(1): 9-20 / 2025-07-11 23 17

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• Authors: 王婷 李小凤 许娜 官宇 龙楚芝 尹棠 魏磊 邢博冉 李小江
• Information:

  重庆科技大学化学化工学院，重庆

• Keywords:
  Deep coalbed methane; Desorption-promoting system; Surfactant; Compound; Fracturing fluid
  深层煤层气; 促解吸体系; 表面活性剂; 复配; 压裂液
• Abstract: In response to the problem of difficult desorption of adsorbed gas in deep coalbed methane (CBM) mining, this study constructs an efficient desorption-promoting system through the screening and compounding of surfactants. By using methods such as contact angle measurement and surface tension testing, and combining with Young’s equation to analyze the interfacial action mechanism, sodium dodecylbenzene sulfonate (SDBS) and a compound system of SDBS and dodecyl dimethylamine oxide (OB-2) are screened out, and a self-made fluorocarbon surfactant (FNC) in the laboratory is introduced. Experiments show that the desorption-promoting system composed of 0.3wt% SDBS, 0.3wt% (SDBS+OB-2), and 0.2wt% FNC solutions can significantly reduce the surface tension and improve the wettability of coal samples. After compounding with emulsion fracturing fluid, it shows excellent compatibility, proppant-carrying performance, and gel-breaking performance, providing theoretical and experimental basis for the integrated technology of fracturingdesorption in deep CBM. 针对深层煤层气开采中吸附气解吸难度大的问题，本研究通过表面活性剂筛选与复配，构建了高效促解吸体系。采用接触角测定、表面张力测试等方法，结合杨氏方程分析界面作用机制，筛选出十二烷基苯磺酸钠（SDBS）及SDBS与十二烷基二甲基氧化胺（OB-2）的复配体系，并引入实验室自制氟碳表面活性剂（FNC）。实验表明，0.3wt%SDBS、0.3wt%（SDBS+OB-2）和0.2wt%FNC溶液构成的促解吸体系可显著降低表面张力、改善煤样润湿性，其与乳液压裂液复配后展现出优良的配伍性、携砂性能及破胶性能，为深层煤层气压裂—解吸一体化技术提供了理论与实验依据。
• DOI: https://doi.org/10.35534/er.0701002
• Cite: 王婷，李小凤，许娜，等．压裂用促解吸体系的构建与性能研究［J］．环境与资源，2025，7（1）：9-20．