摘要：In response to the limitations of traditional guar gum fracturing fluids, characterized by inadequate proppant carrying capacity and substantial reservoir damage, we have synthesized a zwitterionic surfactant EAPHS using ethyl acid (EA), N,N-dimethyl-1,3-propanediamine (DMAPA), and 3-chloro-2-hydroxypropyl sulfonic acid sodium salt. Through the optimization of the NaSal counterion salt ratio, we developed a viscoelastic surfactant (VES) clean fracturing fluid system, with the optimal formulation identified as 4.0 % EAPHS + 3.0 % NaSal. The research results indicate that the critical micelle concentration (CMC) of the EAPHS surfactant is 8.3 × 10?4 mol/L, with the surface tension γCMC is 38.5 mN/m. The observation results from cryogenic transmission electron microscopy (Cryo-TEM) indicate the formation of worm-like micelles in the VES clean fracturing fluid system, facilitating viscosity enhancement and sand-carrying. The viscosity of the VES clean fracturing fluid system remains stable at 34 mPa·s after undergoing continuous shearing at 120 °C and 170 s?1 for 60 min. Furthermore, this system exhibits favorable rheological properties and sand-carrying capabilities. The drag reduction efficiency of the VES clean fracturing fluid system exceeds 60 %, demonstrating excellent micelle-breaking performance. Moreover, the damage rate to the permeability of natural cores caused by the breaking fluid is only 7.34 %. This indicates the low-damage characteristics of the VES clean fracturing fluid system, effectively reducing secondary damage to reservoirs after fracturing. It provides valuable reference and guidance for the further application of VES clean fracturing fluid systems in oilfield operations. ? 2024 Elsevier B.V.

ISSN号：0167-7322

卷、期、页：卷416

发表日期：2024-12-15

期刊分区（SCI为中科院分区）：二区

收录情况：EI（工程索引）

发表期刊名称：Journal of Molecular Liquids

参与作者：朱立新

通讯作者：黄胜铭,王全得,杨俊,郭春萍

第一作者：蒋官澄,董腾飞,贺垠博,杨丽丽

论文类型：期刊论文

论文概要：黄胜铭,蒋官澄,王全得,朱立新,杨俊,郭春萍,董腾飞,贺垠博,杨丽丽，Preparation and performance evaluation of viscoelastic zwitterionic surfactant for cleaning fracturing fluids，Journal of Molecular Liquids，2024，卷416

论文题目：Preparation and performance evaluation of viscoelastic zwitterionic surfactant for cleaning fracturing fluids