NaAMC16S/AM/AA三元共聚物的合成及其溶液性能研究

Synthesis and Solution Properties of NaAMC16S/AM/AA Terpolymer

王凤 王超 朱卓岩 欧阳坚 陈国浩 王源源

WANG Feng，WANG Chao，ZHU Zhuoyan ，OUYANG Jian，CHEN Guohao，WANG Yuanyuan

以丙烯酰胺、丙烯酸和2- 丙烯酰胺基十六烷基磺酸钠（NaAMC16S）为原料，制备了ZS-1、ZS-2、ZS-3（NaAMC16S 单体加量分别为1%、2%、3%）三元共聚物，利用元素分析仪确定了共聚物的组成，考察了共聚物分子量、黏性、抗盐性、抗剪切性及注入性。实验测得ZS-1、ZS-2、ZS-3 的相对分子质量分别为1661× 104、921 × 104、523 × 104。元素分析结果表明，据S 元素的含量计算共聚物的组成，ZS-1、ZS-2、ZS-3 中分别含有0.998% 、1.488% 、1.973% NaAMC16S。随NaAMC16S 含量的增大，共聚物分子量降低，黏度增加，抗盐性和抗剪切性提高。室温下经毛细管剪切后，ZS-1、ZS-2、ZS-3 的黏度保留率分别为84.1% 、87.6% 、89.4% 。岩心实验表明，ZS-3 的注入性良好，并且0.9 g/L ZS-3 溶液与1.8 g/L 部分水解聚丙烯胺（相对分子质量1600× 104）的采收率相当，分别为22.48% 和22.67%，可降低聚合物驱费用。图3 表4 参14

Te rpolymers ZS- 1，ZS-2，ZS-3 were synthesized using acrylamide，acrylic and 1% ，2% ，3% 2-acrylamide hexadecyl sulfonate （NaAMC16S） respectively. The composition of terpolymer was determined by elemental analyzer. The relative molecular mass，viscosity ，salt resistance ，shear resistance and injectivity were tested. The results showed that the relative molecular mass of ZS-1，ZS-2 and ZS-3 was 1661× 104，921 × 104and 523 × 104respectively. Elemental analysis results indicated that ZS- 1，ZS-2 and ZS-3 contained 0.998% ，1.488% ，1.973% NaAMC16S separately ，according to the content of element S. With increasing content of NaAMC16S，the relative molecular mass of terpolymer decreased ，viscosity increased ，salt resistance and shear resistance enhanced. After capillary shearing at room temperature，the viscosity retention rate of ZS- 1，ZS-2 and ZS-3 was 84.1% ，87.6% and 89.4% . Core flooding tests results showed that the injectivity of ZS- 3 was good. Comparing to 1.8 g/L partially hydrolyzed polyacrylamide solution with relative molecular mass 1600× 104，0.9 g/L ZS-3 displacing fluid could get similar recovery ratio（22.48%），which could reduce the cost of polymer flooding.