GWF-200L降失水剂的合成研发及其性能表征

The Synthesis and Perfocmance Characterization of the GWF-200L Fluid-loss Additive

目前国内使用的合成聚合物类降失水剂普遍存在抗高温、抗盐能力差的问题,为解决这一问题,从分子结构入手,优选出性能优异的聚合单体,以2丙烯酰胺基一2甲基丙磺酸(AMPS)、丙烯酰胺(AM)、丙烯酸(AA)为单体,采用氧化一还原引发体系合成了AMPS/AM/AA三元抗高温耐盐油井水泥降失水剂-GWF-200L,分子主链上引入了磺酸基等多种官能团,提高了降失水剂对水泥粒子的吸附能力,从而提高了降失水剂在高温下控制水泥浆失水的能力。分别考察了引发剂加量、反应温度及单体浓度等因素对降失水剂性能的影响,确定了聚合反应的最佳合成条件,制备出了聚合物并进行结构表征确定目标产物。在高温下能将淡水水泥浆150℃/8.0MPa条件下API失水量控制在100m L以内且对水泥石的强度发展无不良影响;具有良好的综合性能,能够满足高温深井固井的需要。

To seek polymers for EOR in hostile reservoirs, the synthesis of acrylamide / N, N-dimethylac-rylamide / 2-acrylamide-2-methylpropane solfonic acid （AMPS/AM/AA） terpolymers by initiated polymerization in aqueous solution is studied. The structure of the terpolymer was confirmed by infrared spectrum （IR） analysis.The performance tests of cement slurry demonstrated that this terpolymer fluid-loss additive could control the API fluid loss amount below 100mL under the condition of 150℃/8.0 MPa saturated brine. The results showed that the copolymer was of better thermal stability and filtrate reducing performance.