聚/表型复合压裂液性能及其对煤样甲烷吸附解吸特性影响实验研究
Experimental study on performance of polymer/surfactant type composite fracturing fluid and its influence on methane adsorption and desorption characteristics of coal samples
刘川东 1张孝强 1晏佳欣 1孙靖鸿1
作者信息
- 1. 湘潭大学 环境与资源学院,湖南 湘潭 411100
- 折叠
摘要
为弥补常规压裂液破胶困难、残留多或黏度低、用量大等缺点,将疏水改性羟丙基瓜尔胶与双子表面活性剂进行交联复配,制得1 种疏水聚合物/表面活性剂复合压裂液,从黏度、破胶性能以及对煤样甲烷吸附解吸能力影响等方面与常规压裂液进行对比分析.研究结果表明:在同等表面活性剂质量分数下,加入疏水改性羟丙基瓜尔胶的复合压裂液黏度是单组份表面活性剂压裂液的3 倍,其破胶时间与表面活性剂压裂液几乎无差别,且仅为HPG压裂液的1/2;复合压裂液对煤样甲烷吸附解吸能力影响明显低于HPG压裂液,其吸附损伤因子虽高于表面活性剂压裂液,但比HPG压裂液低 24%.研究结果可为矿用复合压裂液研制提供参考.
Abstract
In order to make up for the shortcomings of conventional fracturing fluids,such as difficulty in gel breaking,high residue or low viscosity,and large dosage,a hydrophobic polymer/surfactant composite fracturing fluid was formulated by com-bining and cross-linking the gemini surfactant with hydrophobically modified hydroxypropyl guar gum,and it was compared with conventional fracturing fluids in terms of viscosity,gel breaking performance and influence on methane adsorption and desorption capacity of coal samples.The results show that under the same mass fraction of surfactant,the viscosity of the com-posite fracturing fluid adding the hydrophobically modified hydroxypropyl guar gum is three times as that of the single-compo-nent surfactant fracturing fluid,and its gel breaking time is almost indistinguishable from that of the surfactant fracturing fluid and only 1/2 of that of the HPG fracturing fluid.The influence of composite fracturing fluid on the methane adsorption and desorption capacity of coal samples is significantly smaller than that of HPG fracturing fluid,and its adsorption damage factor,although higher than that of surfactant fracturing fluid,is 24%lower than that of HPG fracturing fluid.The research results can provide reference for the development of composite fracturing fluids for mining.
关键词
疏水改性羟丙基瓜尔胶/双子表面活性剂/复合压裂液/甲烷吸附解吸/吸附损伤因子Key words
hydrophobically modified hydroxypropyl guar gum/gemini surfactant/composite fracturing fluid/methane ad-sorption and desorption/adsorption damage factor引用本文复制引用
基金项目
湖南省自然科学基金面上项目(2023JJ30590)
湖南省教育厅优秀青年项目(22B0169)
国家自然科学基金(51804270)
出版年
2024
NETL
NSTL
万方数据