抗高温油井水泥缓凝剂HL-1 的合成与性能

Synthesis and Performance of Retarder HL -1 for High Temperature Cementing

严思明 杨圣月 张红丹 何琴严圣东

YAN Siming YANG Shengyue ZHANG Hongdan HE Qin YAN Shengdong

采用丙烯酸（AA）、马来酸（MA）、对苯乙烯磺酸钠（SSS）和亲水性长链烯类单体（LN）制备了一种四元共聚油井水泥缓凝剂HL-1。采用单因素实验法优化了HL-1 的合成条件，并用红外光谱（IR）和核磁共振氢谱（H1-NMR ）表征了最优合成条件下合成的HL-1 结构，考察了该HL-1 对水泥浆（G 级油井水泥+ 3.0% 微硅+ 30%砂+ 1.5% 降失水剂SZ1-2 + 0.8% 分散剂SXY，水灰比W/S=0.44）的缓凝性能和流变性能及所形成的水泥石抗压强度的影响。优化后的实合成条件为：AA、MA、SSS 、LN摩尔比为0.06∶0.54∶1∶0.1，单体质量分数30% ，反应温度60℃，引发剂加量5.0% ，pH= 5。经IR和H1-NMR 表征，聚合物HL-1 的结构与分子设计的目标产一致。HL-1热稳定性较好，可以在温度低于260℃的较宽温度范围内使用。性能评价结果表明，HL-1 具有较好的高温缓凝性能，在150℃、80MPa 下，加有1.0% HL-1 的水泥浆稠化时间达到380 min；HL-1 对水泥浆有较好的分散作用，可有效改善水泥浆的流动性且对水泥石强度影响不大。图7 表4 参9

A novel cement retar der HL-1 was synthesized by copolymerization of acrylic acid （AA）, maleic acid （MA）, sodium p-styrenesulfonate（SSS）and the hydrophilic long-chain alkene monomers （LN）. The optimized synthesis conditions had been determined by single factor method and the structure of the HL- 1 obtained at the optimal synthetic conditions was characterized with infrared spectrum （IR）and nuclear magnetic resonance hydrogen spectrum （H1-NMR ）.The influence of the HL- 1, obtained atoptimal synthetic conditions, on the retarding propertiesand rheological properties of the slurry （oil well cement G + 3.0% silicon micro +30% sand + 1.5% filtrate reducer SZ1-2 + 0.8% dispersant SXY, water cement ratio W/S =0.44）and on the compressive strength of cement stone was investigated. The optimized synthesis conditions were as follows: the mole ratio of AA, MA, SSS, LN was 0.06∶1∶0.54∶0.1, the monomer mass fraction was of 30%, the reaction temperature was60℃, the dosage of initiator was 5%,and the pH value of 5. The IR and H1-NMR results confirmed that, the structure of HL-1 was consistent with the molecular design. It turned out that the HL- 1 had good thermal stability and could be used below 260℃.The evaluation results showed that HL- 1 had good high temperature retarding performance and the thickening time of the cement slurry containing 1.0%HL-1 reached 380 min at the temperature of 150℃and at the pressure of 80MPa. HL-1 had good dispersion effect on the slurry, which could effectively improve the liquidity of the slurry and had little influence on the strength of cement stone.