采用流变法研究了聚合物质量分数、交联剂质量分数、温度、pH、盐离子、阴离子表活剂（SDBS）对PAM/PEI凝胶成胶时间的影响。实验结果表明，聚合物质量分数增加，凝胶成胶时间先增加后降低；而交联剂质量分数增加，凝胶成胶时间逐渐降低，且降低幅度逐渐减小；温度增加，凝胶成胶时间缩短；中性条件下凝胶成胶时间比碱性时长，而酸性条件下凝胶无法成胶；Na⁺和Ca²⁺均会延长凝胶成胶时间，且质量分数越高，成胶时间越长；SDBS会极大地延长凝胶成胶时间，SDBS质量分数为0.2%时，凝胶成胶时间增至50 h左右。

The influences of polymer concentration,crosslinker concentration,temperature,pH value,salt ion and SDBS on the gelation time of PAM/PEI gel system are investigated by means of rheological tests.The results indicate that the gelation time first increases and then decreases with the increase of polymer concentration;while with the increase of crosslinker concentration,the gelation time decreases gradually but the decrease rate shrinks gradually;higher temperature leads to shorter gelation time;the gelation time in neutral condition is longer than in alkaline condition,and no gel is observed in acid condition;both sodium and calcium ions can retard the gelation time of the gel system and the higher the mass fraction of salt ions,the longer the gelation time;SDBS can greatly retard the gelation time,when the mass fraction of SDBS is 0.2%,the gelation time can be elongated to about 50 hours.

秦义(1987-),男,博士研究生,主要从事提高采收率以及调剖堵水研究,qinyi0002012@126.com