一种具有超长侧链的疏水缔合型聚合物的合成及减阻性能评价  

Synthesis and drag reduction performance evaluation of a hydrophobic associated polymer with ultra long side chains

作　　者：张亚东[1] 敬显武 刘友权[1] 戴茜 ZHANG Yadong;JING Xianwu;LIU Youquan;DAI Qian(Research Institute of Natural Gas Technology,PetroChina Southwest Oil and Gasfield Company,Chengdu 610213,China;Key Laboratory of Shale Gas Evaluation and Exploitation,Sichuan Province,Chengdu 610213,China;Development Division,PetroChina Southwest Oil and Gasfield Company,Chengdu 610056,China)

机构地区：[1]中国石油西南油气田分公司天然气研究院,四川成都610213 [2]页岩气开采与评价四川省重点实验室,四川成都610213 [3]中国石油西南油气田分公司开发事业部,四川成都610056

出　　处：《石油化工》2024年第11期1604-1610,共7页Petrochemical Technology

基　　金：西南油气田公司项目(20230302-14)。

摘　　要：采用曲拉通和丙烯酰氯醇解合成一种水溶性可聚合单体,仅使用水作为溶剂合成一种具有超长侧链的疏水缔合型聚丙烯酰胺(HAPAM)作为减阻剂,通过分子动力学模拟方法对比了聚丙烯酰胺、部分水解聚丙烯酰胺和合成的具有超长侧链的HAPAM与水的相互作用,并分别以去离子水和盐水配液改变HAPAM含量,测量不同HAPAM含量的滑溜水在不同流速下的摩阻,并计算相应的减阻率。实验结果表明,具有超长侧链的HAPAM与水的相互作用最强;减阻率随流速的增加而增大,HAPAM含量越高,减阻率达到70%所需的流速越高,减阻率最高可达80%以上;盐对滑溜水的减阻率和黏度有显著负面影响,需提高HAPAM含量才能获得理想的减阻率;SEM表征结果显示,HAPAM在清水和盐水中的分布形态均为网状结构。A water-soluble polymerizable monomer was synthesized by an alcoholysis reaction of triton and acryloyl chloride.Subsequently,a hydrophobic associative polyacrylamide(HAPAM)with ultra-long side chains was synthesized as a drag reducing agent(DRA)using only water as the solvent.The interactions between polyacrylamide,partially hydrolyzed polyacrylamide,and the synthesized HAPAM with water were compared using molecular dynamics simulations.The DRA concentration was changed by mixing it with deionized and saline water,and the friction of different concentrations of slick water at various flow rates was measured to calculate the drag reduction rates.The experimental results indicate that the HAPAM with ultra-long side chains demonstrates the best interaction performance with water.The drag reduction rate increases with the increase in flow rate.A higher concentration of the drag-reducing agent requires a greater flow rate to achieve a drag reduction rate of 70%,and the highest drag reduction rate can reach up to 80%.Inorganic salts have a significant negative impact on both the drag reduction rate and viscosity of slick water,necessitating an increase in the concentration of the DRA to achieve the desired drag reduction rate.The SEM characterization results show that the distribution morphology of the DRA in both fresh water and saline water forms a network structure.

关 键 词：滑溜水压裂液 疏水缔合型聚合物 减阻剂 摩阻 减阻率 网状结构 

分 类 号：TE39[石油与天然气工程—油气田开发工程]