含氟疏水缔合压裂液稠化剂的合成及性能研究

Synthesis and Performance Research of Fluorinated Hydrophobically Associating Fracturing Fluid Thickener

赵庆美 赵 林 汤 琪 马 超

ZHAO Qingmei ZHAO Lin TANG Qi MA Chao

为提高疏水缔合聚丙烯酰胺的性能， 以 1H， 1H， 2H， 2H-十七氟癸烷丙烯酸酯 （HFA） 为疏水单体， 以丙烯酰胺 （AM）、 丙烯酸 （AA） 为水溶性单体， 采用胶束聚合法合成了含氟疏水缔合聚丙烯酰胺 （FAPAM）。用红外光谱仪对产物结构进行了表征， 研究了 AA和 HFA加量对 FAPAM表观黏度和相对分子质量的影响， 考察了 FAPAM的耐温性、 抗剪切性、 抗盐性及交联性。研究结果表明， FAPAM为 AM、 AA、 HFA的三元共聚物； AA和 HFA加量分别为单体总质量的 30%数 40%和 0.5%时， 合成的 FAPAM的表观黏度 （3376.7 mPa·s） 最大。FAPAM的耐温性较好， 在 110℃下放置 1 h后的表观黏度大于 100 mPa· s； FAPAM的抗剪切性较好， 在 300 r/min下剪切 48 h的表观黏度大于 500 mPa·s； 在 Na+或 Ca2+质量浓度为 0.5 g/L时， FAPAM的表观黏度大于 50 mPa·s， 抗盐性好于 PAM（HFA加量为 0）； 在 30℃下， FAPAM可与有机铬快速交联。FAPAM的耐温性、 抗盐性和耐剪切性均优于 PAM，可以作为压裂液稠化剂使用。图 6表 3参 15

In order to improve the performance of hydrophobically associating polyacrylamide，hydrophobically associating fluorinated polyacrylamide（FAPAM）was prepared with 1H， 1H， 2H， 2H-heptadeca fluorodecyl acrylate（HFA），acrylamide （AM）and acrylic acid（AA）through radical micellar polymerization. The molecular structure of the terpolymer was confirmed by infrared spectrometer. The effects of the dosage of AA and HFA on the apparent viscosity and relative molecular mass of FAPAM were studied，and the temperature tolerance，salt resistance，shearing resistance and cross-linking behavior of FAPAM were investigated. The results showed that the FAPAM was a terpolymer which consist of AM，AA and HFA. The largest apparent viscosity of FAPAM was 3376.7 mPa·s when the dosage of HFA and AA was 0.5% and 30%—40% in terms of total monomer mass respectively. The apparent viscosity of FAPAM was still higher than 100 mPa·s placing 60 min at 110℃，and that higher than 500 mPa·s shearing 48 h at 300 r/min，showing good temperature tolerance and shearing resistance. The apparent viscosity of FAPAM was higher than 50 mPa·s when the concentration of Na+ or Ca2+ was 0.5 g/L respectively. The salt resistance of FAPAM was better than that of PAM（without HFA） . The FAPAM showed better crosslinking behavior at 30℃ with chromium-organic as the crosslink agent. The temperature tolerance，salt resistance and shearing resistance of FAPAM were better than that of PAM，which might ensure FAPAM to be the potential candidate as thickener for fracturing fluid.

10.19346/j.cnki.1000-4092.2016.04.006