耐温缓交联有机锆冻胶压裂液的制备与性能评价  

Preparation and performance evaluation of organic zirconium gelled fracturing fluid with high temperature resistance and slowly-cross-linking

作　　者：斤朕 张春生[1] Zhen Jin;Chunsheng Zhang(School of Geosciences,Yangtze University,Wuhan,Hubei 434023,China)

机构地区：[1]长江大学地球科学学院,湖北武汉434023

出　　处：《日用化学工业（中英文）》2023年第3期279-284,共6页China Surfactant Detergent & Cosmetics

基　　金：国家自然科学基金资助项目(41472097)。

摘　　要：针对目前现场常用的压裂液耐温性差、交联时间短及残渣含量高等诸多问题,以氧氯化锆、多元醇、有机配体、络合交联剂和高温稳定剂等原料成功合成了有机锆交联剂YJ-3,并选用聚丙烯酰胺类稠化剂RG-1和添加剂制备出一种耐温缓交联有机锆冻胶压裂液体系。采用单因素试验对交联剂YJ-3和稠化剂RG-1质量分数进行了优化,进而评价了该压裂液体系的性能指标。实验结果表明:压裂液的较优配方组成为0.50%RG-1+2.0%YJ-3+0.15%Na_(2)S_(2)O_(3)+0.8%助排剂,该体系交联时间在3~45 min之间可调,90℃和150℃时在170 s^(-1)速度下剪切2 h后黏度仍高于50 mPa·s,携砂性能和滤失性明显优于常规瓜胶压裂液体系,在1~3 h内可实现完全破胶,无残渣、易于返排,是一种性能优良的耐温缓交联型低伤害压裂液,具有广阔的现场应用前景。To solve the problems of poor temperature resistance,short cross-linking time and high residue content of fracturing fluids commonly used in field,an organic zirconium cross-linking agent YJ-3 was successfully synthesized from zirconium oxychloride,polyols,organic ligands,complex cross-linking agent and high temperature stabilizer.On this basis,a temperature resistant and slowly-cross-linking organic zirconium gelled fracturing fluid was prepared by selecting polyacrylamide thickener RG-1 and additives.Mass fractions of YJ-3 and RG-1 were optimized by single factor method,and the performance indexes of the fracturing fluid system were evaluated.Experimental results showed that the optimal composition of the fracturing fluid was 0.50%RG-1+2.0%YJ-3+0.15%Na_(2)S_(2)O_(3)+0.8%cleanup additive.The cross-linking time was adjustable between 3 and 45 min.The viscosity was still higher than 50 mPa·s at 90℃and 150℃after shear at 170 s^(-1) for 2 h.The sand-carrying performance and filtration property were obviously better than that of conventional fracturing fluid system based on guar gum.Fracturing fluid could be completely broken within 1-3 h,without residue and easy to flow back.It is a kind of temperature-resistant,slowly-cross-linking and lowdamage fracturing fluid with excellent performance,which has a broad application prospect.

关 键 词：耐温 锆冻胶 压裂液 缓交联 性能评价 

分 类 号：TE357[石油与天然气工程—油气田开发工程]