Abstract: At present, most of the main agent of conventional clean fracturing fluids are viscoelastic sixteen (or eighteen) alkyltrimethylammonium chloride, which has poor temperature resistance (generally less than 60 ℃). The quaternary ammonium salt type surfactant (JS-VES) based on high carbon chain erucic acid has good temperature resistance. In this paper, a high-carbon erucic acidtype clean fracturing fluid (mass fraction) (0.80% JS-VES+0.68%NaSal+2.60%KCl+0.40%Na₂S₂O₃) was developed with JSVES as the main agent, and compared with the conventional clean fracturing fluid system performance. The highcarbon erucic acidtype clean fracturing fluid system (25 ℃, 170 s^-1) has an apparent viscosity of 25 mPa•s. It has good shear resistance, and can meet the requirements of suspended sand in the static suspension of sand, with a good breaking capacity (2 mPa•s) and temperature resistance (80 ℃).

Key words: Viscoelastic surfactant, Clean fracturing fluid, Erucic acid type quaternary ammonium salt surfactant

摘要： 目前常规清洁压裂液主剂多为黏弹性表面活性剂十六(或十八)烷基三甲基氯化铵,该类清洁压裂液的抗温能力较差(一般低于60℃)。基于高碳链芥酸的季铵盐型表面活性剂(JS-VES)具有良好的耐温能力,以JSVES 为主剂研制高碳链芥酸型清洁压裂液,其配方为(质量分数)(0.80%JS-VES+0.68%NaSal+2.60%KCl+ 0.40%Na₂S₂O₃),和常规清洁压裂液体系的性能进行对比。结果表明,高碳链芥酸型清洁压裂液体系(25 ℃、170 s-1)表观黏度为25mPa·s,具有良好的耐剪切性能,在静态悬砂试验中可满足悬砂要求,具有良好的破胶能力(2 mPa·s)和耐温能力(80℃)。

关键词: 黏弹性表面活性剂, 清洁压裂液, 芥酸型季铵盐表面活性