Abstract: The rheological behavior of LWZ polymer solution and LWZ gel were separately studied with rheometer of HAAKE RS600. Dielectric withstand voltage test detected the withstand voltage of gel. The results of rheological test show the polymer solution of LWZ was Ostward de Waele fluid and the viscosity is 120 mPa•s at 30 ℃. Viscosity-temperature curve show when the temperature raised, the viscosity of LWZ base fluid decreased. The test of oscillation stress sweep and oscillation frequency sweep and oscillation time sweep show that LWZ gel owned high elastic properties. In addition, the yield value of LWZ gel is 172.4 Pa. Dielectric withstand voltage test indicated LWZ gel could resist pressure of 0.057 5 MP/m in the height of 1 m and diameter of 126 mm N80 pipe under 100 ℃. 

Key words: Killing well fluid,    , Rheological properties,    ,  Gel,    ,  Performance evaluation,    ,  Pressure test

摘要： 采用HAAKE RS600流变仪和凝胶测压装置对LWZ高强度凝胶压井液成胶前后的交联体系的流变性质和耐压强度进行了研究。结果表明，在30 ℃下LWZ基液为Ostward de Waele流体，黏度只有120 mPa•s。黏温曲线表明基液表观黏度随温度增加逐渐降低。强迫振荡应力扫描、频率扫描和定应力定频率扫描实验均显示LWZ凝胶具有高弹性的特点，且凝胶的屈服值为172.4 Pa。100 ℃下LWZ强凝胶在直径为126 mm、高1 m的N80管中耐压强度达0.057 5 MPa/m。

关键词: 压井液 , 流变性质 , 凝胶 , 性能评价 , 耐压测试