压裂用疏水缔合聚合物溶液性质及减阻性能  

Solution Properties and Drag Reduction of Hydrophobically Associating Polymer for Fracturing Fluids

作　　者：马国艳[1] 沈一丁[1] 王小荣[2] 李楷[3] 郭兴[1] 

机构地区：[1]教育部轻化工助剂化学与技术重点实验室,陕西科技大学化学与化工学院,陕西西安710021 [2]咸阳师范学院化学与化工学院,陕西咸阳712000 [3]中国石油长庆油田分公司油气工艺研究院,陕西西安710021

出　　处：《精细化工》2016年第10期1159-1164,共6页Fine Chemicals

基　　金：陕西科技大学研究生创新基金~~

摘　　要：以功能性疏水单体甲基丙烯酸长链酯与丙烯酰胺(AM)、丙烯酸(AA)和2-丙烯酰胺-2-甲基丙磺酸(AMPS)为原料,合成了疏水缔合聚合物HAWP-18。采用流变仪考察了HAWP-18的耐剪切性能、黏弹性及触变性。结果表明:HAWP-18属于假塑性流体,临界缔合质量浓度为2.31 g/L,随着剪切速率增加,HAWP-18的表观黏度缓慢下降后不变,剪切速率降低后,表观黏度可再度恢复,表现出较强的耐剪切性能;黏弹性测试表明:HAWP-18是典型的黏弹性结构流体,具有较宽的线性黏弹区,该体系的储能模量G'大于损耗模量G″,并且黏度越大,弹性特征越强。采用稳态剪切测试考察了不同质量浓度HAWP-18的剪切应力与剪切速率的关系,结果表明:HAWP-18具有触变性,并且触变性随质量浓度增大而增强。使用自制摩阻测试仪测定了不同质量浓度HAWP-18的减阻性能,结果表明:HAWP-18减阻率随质量浓度的增加先上升后降低。A hydrophobically associating polymer HAWP-18 was synthesized by using long chain methacrylates as functional hydrophobic monomer,and acrylamide（AM）,acrylic acid（AA） and 2-Acrylamido-2-methylpropane sulfonic acid（AMPS） as raw materials. Properties of shearing resistance,viscoelasticity and thixotropy of hydrophobic associating polymer HAWP-18 was investigated by using rheometer. The results show that HAWP-18 solutions were pseudoplastic fluid,and the critical associating concentration of HAWP-18 solution was 2. 31 g/L. With the increasement of shear rate,the apparent viscosity first slowly decreased and then kept constant,but with the shear rate decreased,the apparent viscosity could increased to the initial viscosity again,which exhibited a stronger shearing resistance. According to the viscoelasticity results,HAWP-18 is a typical viscoelastic structure fluid and has a relatively wide linear viscoelastic region. The value of storage modulus（G＇） is larger than loss modulus（G″）. The higher the viscosity was,the stronger the elastic characteristic of HAWP-18 was. The variation of shear stress with shear rate was also discussed by using steady-state shear test of HAWP-18 with different mass concentrations. It was shown that HAWP-18 had thixotropy property.With the increment of the mass concentration,the thixotropy property enhanced. The drag reductionproperty of HAWP-18 solutions with different mass concentrations was tested by using homemade friction tester. The drag reduction test showed that the drag reduction rate of HAWP-18 increased at first and decreased latter with the increment of the HAWP-18.

关 键 词：疏水缔合聚合物 流变性 黏弹性 触变性 减阻率 油田化学品 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]