可逆交联聚合物压裂液黏弹性及变剪切性能研究  

Study on the Viscoelasticity and Variable Shear of Reversible Cross-linking Polymer Fracturing Fluid

作　　者：杜涛[1] 姚奕明[1] 蒋廷学[1] 陈作[1] 张旭东[1] 

机构地区：[1]中国石油化工股份有限公司石油工程技术研究院,中国石油化工股份有限公司页岩油气富集机理与有效开发国家重点实验室,北京100101

出　　处：《化学世界》2016年第10期609-612,共4页Chemical World

基　　金：国家重大科技专项“彭水地区高效钻井及压裂工程工艺优化技术”(2016ZX05061-002);国家重大科技专项“大型油气田及煤层气开发--复杂地层储层改造关键技术”(2011ZX05031-004-003);中国石化石油工程技术服务有限公司重点项目“合成聚合物压裂液开发与应用”(10010099-13-ZC0607-0037);国家自然科学基金重大项目“页岩地层动态随机裂缝控制机理与无水压裂理论”(51490653);中国石化科技攻关项目“LPG无水压裂液研究”(P15042);中国石化科技部院控项目“抗盐压裂液研制”

摘　　要：可逆交联聚合物压裂液的携砂能力不仅与黏度有关,而且与其黏弹性相关,因此研究可逆交联聚合物压裂液的黏弹性显得十分必要。文章对可逆交联聚合物压裂液进行了应力扫描和频率扫描实验,讨论了可逆交联聚合物压裂液的黏弹性,评价了压裂液的变剪切性能。结果表明：随着聚合物浓度的增加,可逆交联聚合物压裂液线性黏弹区的范围变宽,储能模量和耗能模量增加,黏弹性提高;当温度为120~160℃,经170s-1、剪切100 min后的平均尾黏分别为56、52和40mPa·s,说明体系具有良好的耐温耐剪切性能。The sand carrying capacity of reversible cross-linking polymer fracturing fluid is related not only to viscosity but also to viscoelasticity,so it is necessary to study the viscoelasticity of reversible cross-linking polymer fracturing fluid.In this work the stress and frequency scanning experiments of it were carried out,the viscoelasticity of it was discussed,and the variable shear performance of it was evaluated.The results showed that increasing the polymer concentration the linear viscoelastic region of the reversible crosslinking polymer fracturing fluid became wider,the reservoir and energy modulus were increased,and the viscoelasticity was better.The average viscosities were 56、52and 40mPa·s at 120~160 ℃after shearing at 170s-1 for 100 min.The system showed good temperature and shearing resistance.

关 键 词：可逆交联聚合物压裂液 黏弹性 应力扫描 频率扫描 变剪切性能 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]