第34卷第3期 2017年5月
钻井液与完井液
DRILLINGFLUID&COMPLETIONFLUID
doi:10.3969/j.issn.1001-5620.2017.03.022
Vol.34 No.3 May2017
分子自组装对缔合压裂液黏度“回复”的机理分析
祝琦，陈宁1，张志行2
09）
2.中石化华东石油工程有限公司江苏钻井公司，江苏扬州225000）
祝琦，陈宁，张志行.分子自组装对缔合压聚液黏度“回复”的机理分析[].钻井液与完井液，2017，34（3）：111-116.
ZHU Qi, CHEN Ning, ZHANG Zhixing.Analyzing the mechanisms of the “recovery" of association fracturing fluids viscosity by molecules self-assembly[J].Drilling Fluid & Completion Fluid, 2017, 34 (3) : 111-116.
摘要近些年，通过疏水缔合聚合物与表面活性剂复配所形成的具有
“超分子结构”的缔合体系，被作为新型清洁压对这种缔合压裂液体系的成网机理、剪切“回复性”
裂液已有相关的报道。绝大多数文章关注稠化剂的研发和性能评价，入
机理等基础研究较少。通过变剪切流变实验、环境扫描电镜、
支撑剂悬浮实验，对缔合压裂液体系的成网机理、剪切“回
复性”机理进行了分析研究，
从可视化的角度直观地分析并阐述了分子自组装对缔合压裂液体系表观黏度“回复”的作用。
分析研究结果表明，缔合压裂液的“空间网络状结构”
是通过疏水支链与表面活性剂“共用”胶束、疏水缔合聚合物分子
间缔合和分子间缠绕的方式形成的；剪切作用撤销以后，拆散了的表面活性剂自组装成新的“胶束”并与剪碎了的疏水缔处于一种“动态平衡”状态，并以新构建的“网络状结构”悬浮支撑剂。
关键词水基压裂液；黏度“回复”；超分子结构；分子自组装；机理研究
中图分类号：TE357.12
文献标识码：A
文章编号：1001-5620（2017）03-0111-06
Analyzing the Mechanisms of the"Recovery" of Association Fracturing Fluids Viscosity by Molecules
Self-assembly
ZHU Qi', CHEN Ning', ZHANG Zhixing
(1. TheFourthDrilling Branch of CNPC Bohai Drilling Engineering Company Limited, Renqiu, Hebei 062550; 2.JiangsuDrilling Company of Sinopec EastChinaPetroleumEngineering Co.,Ltd,Yangzhou,Jiangsu225000;)
Abstraet In recent years, reports have been found of new clear fracturing fluids, a liquid system with “supramolecular structure" formulated with hydrophobically associating polymers and surfactants, Most of the reports have focused on the development and performance evaluation of the polymeric thickeners, while the mechanisms of forming molecular network and regaining viscosity through shearing of the fracturing fluids have rarely been studied. To study the mechanisms mentioned above, varied shearing rheology experiment, environmental scanning electron microscope (ESEM) experiment and proppant suspending experiment have been conducted, and the effects of molecules' self-assembly on the two mechanisms have been visually analyzed and explained. The analytical results demonstrated that the “spatial networking structure" of the association fracturing fluid is formed through the “shared" micelles between hydrophobic molecular side-chains and surfactant molecules, inter-molecular association and inter-molecular entanglement of the hydrophobically associating polymer. When shearing of the fracturing fluid is stopped, the shear-broken surfactant molecules will form new “micelles"” through self-assembly, and further re-form new “networking structure” with the hydrophobic side-chains of the shear-broken hydrophobically associating polymer.“Sliding movement" between two layers ofmolecules causes the new “networking structure" of the “association fracturing fluid" to be in a “dynamic equilibrium" state, and to suspend proppants with
基金项目：中国石油集团游海钻探工程有限公司项目“新型低荧光、环保型钻井液体系研究与现场应用”（2017Z48K）；中国石油集团游海钻探工程有限公司项目“趣分子化学堵漏技术研究”（2016Z61Y）；“十三五国家科技重大专项“复杂结构井、丛式井安全环保型钻井液新技术”（2017ZX05009-003）。
第一作者简介：祝琦，博士，工程师，主要从事钻完井工作液理论与工程技术和油气藏增产理论与工程技术领域研究。
电话15313352335；E-mail：zhu_qicnpc.com.cn。万方数据