摘要
在45℃下对溶解氧对聚合物污水溶液表观黏度（170s^-1）的影响作了全面的实验研究。采油污水取自大庆采油二厂．矿化度4013、Fe^3＋、∑Fe、SO4^2-分别为0．2、1．0、9．6mg／L。厌氧实验操作和测试均在Baetron 1．5型厌氧室中进行。污水中SRB菌数随放置时间延长而增加，厌氧条件下增速远大于曝氧条件下的增速，放置7天时菌数相差6—600倍。用脱氧和含氧加盐蒸馏水配制的抗盐型和功能型聚合物溶液的黏度，均随放置时间延长（1～10天）而减小，脱氧溶液的黏度总是明显大于含氧溶液。0．5g／L超高分聚合物溶液在厌氧和曝氧条件下放置时，黏度随放置时间延长而减小，分别由1天时的22．2和28．8mPa·s减至60天时的2．7和3．4mPa·s，曝氧条件下的黏度总是大于厌氧条件下的黏度；加入甲醛杀菌剂使溶液黏度的减小趋缓，60天时为8.9和9．6mPa·s；在4～8mg／L范围改变含氧量，当舍氧6mg／L时放置2～40天时的黏度均最大，40天时为18．2mPa·s。6mg／L为污水的合理曝氧量。分析了聚合物降解、SRB菌作用、杀菌剂作用等机理。表6参10。
The effects of dissolved O2 on apparent viscosity at 170 s^-1 of polymer solutions prepared in oilfield produced water are comprehensively investigated in laboratory at 45℃. The produced water is taken from the 2nd Daqing production factory, being of TSD = 4013 mg/L and concentrations of Fe^2 ＋ , Fe^2＋ Fe^3＋, SO4^2- 0.2, 1.0, 9.6 mg/L, respectively. All the anaerobic procedures and measurements are performed in anaerobic chamber Baetron-1.5. With increasing standing time, the SRB population increases more fast under an anaerobic, or O2 free, atmosphere than under an O2 containing atmosphere and a 6-600-fold difference in SRB population is observed in 7 days. For solutions of a salt resistant and a functional aerylarnide polymers in O2 free and containing distilled water with salts added, the viscosity decreases with increasing standing time （1-10 days） and the O2 free solutions always has higher viscosity than the O2 containing solutions, For 0.5 g/L ultrahigh molar mass HPAM polymer solutions, the viscosity decreases with increasing standing time, too, from 22.2 and 28.8 mPa·s over 1 day to 2.7 and 3.4 mPa·s over 60 days under O2 free and containing atmosphere, respectively, and is always higher under O2 free atmosphere than at O2 containing atmosphere; introducing bactericide formalin reduces the tendency of viscosity diminishing and the viscosity of O2 free and containing solutions is of 8.9 and 9.6 mPa · s in 60 days of standing; with increasing O2 content from 4 to 8 mg/L, the solution viscosity values go through a maximum at O2 content= 6 mg/L when standing over 2-40 days, being of 18.2 mPa·s in 40 days of standing. The optimal O2 content in the produced water appears to be of 6 mg/L. The mechanisms involved in polymer degradation and in functions of SRB bacteria and the bactericide are analyzed.
出处
《油田化学》
CAS
CSCD
北大核心
2006年第3期239-242,共4页
Oilfield Chemistry
关键词
聚合物溶液
采油污水
曝氧处理
含氧量控制
黏度控制
驱油聚合物
氧化降解
大庆油田
polymer solutions
oil field produced water treatment by oxygen exposure
dissolved orygen control
viscosity control
polymers for EOR ： Daqing oil fields
