第33参第5期 2016年9月
钻井液与完井液
DRILLINGFLUID&COMPLETIONFLUID
doi:10.3696/j.issn.1001-5620.2016.05.025
Vol.33 No. 5 Sept.2016
疏水缔合聚合物压裂液稠化剂LP-3A的研究
张昀，李兆敏，刘已全，叶金桥，柏浩
（中国石油大学（华东）石油工程学院，山东青岛266580）
张昀等，疏水缔合聚合物压裂液稠化剂LP-3A的研究[].钻井液与完井液，2016，33（5)：119-123.
摘要采用反相乳液聚合方法，以AM、AMPS、带疏水链及聚氧乙烯基团的可聚合单体为原料，以过氧化苯甲酰（BPO）为引发剂，合成出新型疏水缔合聚合物稠化剂LP-3A。在室内通过单因素法得到了聚合反应最优单体比例、反应时间、反应温度、引发剂加量，并对LP-3A进行结构表征及耐温耐剪切性能、剪切恢复性能、粘弹性能、触变性能的研究。结果表明， LP-3A耐温耐剪切性能良好，在150℃、170s"下剪切2h，剩余黏度为200mPa*s；剪切恢复率高，经过500s"、1000s 剪切20min后，停止剪切的黏度恢复率为90%；黏粘弹性能及分子网终结构稳定性优于瓜胶压票液，相比瓜胶，破坏LP-3A
结构所需的能量较大，结构恢复所需的时间也较长，在LP-3A压裂液中弹性占主导地位，且黏弹性优于瓜胶压裂液。关键词压梨液；稠化剂；疏水缔合物；剪切恢复性；黏弹性；触变性；合成
中图分类号：TE357.12
文献标识码：A
文章编号：1001-5620（2016）05-0119-05
Study on a Hydrophobically Associating Polymer Viscosifier forFracturing Fluids
ZHANG Yun, LI Zhaomin, LIU Jiquan, YE Jinqiao, BAI Hao
(College ofPetroleum Engineering, China University of Petroleum,Qingdao,Shandong 266580)
Abstract A new hydrophobically associating polymer, LP-3A was synthesized through inverse emulsion polymerization, using AM, AMPS and monomers with hydrophobic chains and polyoxyalkylene groups as raw material, and benzoperoxide (BPO) as initiator The polymerization conditions such as the optimum ratios of monomers, reaction time, temperature and initiator concentration etc were determined through one-factor-at-a-time method. The molecular structure of LP-3A, a viscosifier used in fracturing fluids, was characterized, and the properties of LP-3A, such as temperature stability, shearing stability, recovery performance afer shearing. viscoelasticity and thixotropy were studied. The study demonstrated that LP-3A had good high temperature stability and shearing perfomance. After being sheared under 150 C and 170 sfor 2h, LP-3A stll had residue viscosity of200 mPa * s. After being sheared for 20 min at 500 s* and 1,000 s**, respectively, shearing was stopped, and 90% of the viscosity of the LP-3A solution can be recovered. oaoaaaeoanaaee the structure was longer, In the LP-3A fracturing fluids, elasticity prevails, and the viscoelasticity of LP-3A fracturing fluids is superior to guar gum fracturing fluids
Key words Fracturing fluid; Viscosifier; Hydrophobically associating matter; Shearing recovery performance; Viscoelasticity Thixotropy; Synthesis
现场应用最多的压裂液稠化剂是天然植物胶及其衍生物]，但其具有耐温性能差(]，对地层伤害性大3、与地层不配伍等缺点。近年来为了克服植物胶体系的缺点，开始人工合成聚合物的研究
热潮。人工合成聚合物大多为在聚丙烯胺聚合物上进行改性，通过在分子链上引人优良性能基团提高聚合物性能，以适于在油田现场应用间。因此以丙烯酰胺、2-丙烯酰胺-2-甲基丙磺酸、带疏水
基金项目：国家高新技术研究发展计划（863计划）“低伤害压裂液体系研究与应用”（2013AA061400）；国家科技重大专项“大型油气田煤层气开发”（2011ZX05051）
第一作者简介：张哟，1993年生，女，硕士研究生，主要从事油气田开发发面的研究。电话18654533569；E-mail：
283098114qq.com。万方数据