【摘要】 为了提高油田压裂改造中常用水基压裂液的耐温和耐盐性能,本文以丙烯酸（AA）、丙烯酰胺（AM）、2-丙烯酰胺基-2-甲基丙磺酸（AMPS）和季铵盐型长尾疏水单体（DS）为原料,制备了疏水改性聚合物增稠剂（AAAD）。有机硼酸盐与葡萄糖酸钠形成配合物（GS-2）为交联剂,再加入其它添加剂,AAAD通过交联反应,制备出改性聚合物压裂液。评价了该体系的流变性、黏弹性、耐温性、抗盐性和破胶性等性能。结果表明,压裂液在温度150℃、剪切速率170 s^-1条件下具有良好的流变性能;在90℃,破胶剂过硫酸铵质量分数为0.01%条件下,4 h即可破胶,破胶液黏度为1.6 m Pa·s。更多还原

【Abstract】 In order to improve the temperate and salt tolerance performance of water base fracturing fluid used in fracturing and reconstruction of oil field,acrylic acid（AA）,acrylamide（AM）,2-acrylamide-2-methyl propane sulfonic acid（AMPS）and cationic hydrophobic long chain monomer（DS）were used as raw materials to prepare a modified hydrophobic polymer thickener（AAAD）.A new fracturing fluid system was prepared using AAAD as the thickening agent,the complex of organic borates and sodium gluconate（GS-2）as the crosslinking agent.The system rheology and viscoelasticity,temperature resistance,salt resistance and gel breaking performance were evaluated.The results show that the fracturing fluid has good rheological properties at 150℃with the shear rate of 170 s^-1.The gel can be broken within 4 h at 90℃and the viscosity of the gel breaking liquid is 1.6 m Pa·s when mass fraction of ammonium persulfate is 0.01%.更多还原