石油化工2019，Vol.48Issue(9)：957-962,6.DOI:10.3969/j.issn.1000-8144.2019.09.013
CO2响应性清洁压裂液的研究与评价
Study and evaluation of CO2 responsive clean fracturing fluid
摘要
Abstract
The viscoelastic surfactant TAV with CO2 responsiveness was prepared as a cleaner fracturing fluid thickener,and the optimum formulation of the fracturing fluid was obtained by screening the counter-ion salts. The oil-water interfacial tension before and after protonation of TAV solution with CO2,the rheological property,sand carrying property,gel breaking and cycling property of fracturing fluid were tested. The results show that TAV solution after CO2 response can significantly reduce oil-water interfacial tension. The viscosity of 2.5%(w) TAV is 78 mPa·s with 0.2%(w) KCl auxiliary agent,and the rheological shear at 110 ℃ for 120 min meets the requirements. The system has good suspension property for quartz sand in the range of 20-100 mesh and is still in uniform distribution after 120 min. The conductivity test proves that the system can repeat the response of CO2/N2. The breaking time of the system is 8 minutes after bubbing N2 at 40 ℃,and core damage rate is as low as 12.7%.关键词
CO2响应/清洁压裂液/循环利用/环保Key words
CO2 responsive/clean fracturing fluid/recycling/environment-friendly分类
化学化工引用本文复制引用
张俊,鲁大丽,杨雪..CO2响应性清洁压裂液的研究与评价[J].石油化工,2019,48(9):957-962,6.基金项目
中石油科技创新基金项目(2017D-5007-0314) （2017D-5007-0314）
湖北省教育厅2016年度科学研究计划指导性项目(B2016443). （B2016443）
