耐温抗盐型乳化降黏剂AFOP的合成及性能

Synthesis and Properties of Emulsified Viscosity Reducers with Temperature Resistant and Salt Tolerant

刘义刚 王艳萍 王秋霞 姜翠玉 刘 昊 张龙力

LIU Yigang WANG Yanping WANG Qiuxia JIANG Cuiyu LIU Hao ZHANG Longli

针对目前乳化降黏剂在稠油油藏化学驱和压裂采油过程中存在耐温抗盐性差的问题，以双酚AF（BPAF）、对羟基苯磺酸（PHSA）和辛基酚聚氧乙烯醚（OP-10）为原料，采用两步三段法合成了一种耐温抗盐型乳化降黏剂AFOP，以耐温抗盐性、降黏性为指标，优化了降黏剂AFOP的合成条件，利用IR、GPC对AFOP的结构进行了表征，考察了在高温高盐情况下降黏剂AFOP对几种稠油的降黏效果，并与油田用降黏剂在高温高盐下的降黏效果进行了对比。研究得出AFOP最佳合成条件为BPAF、PHSA和OP-10的摩尔比为1∶4∶6，羟甲基化阶段碱性条件下在80℃下反应1.5 h，酸性条件下在80℃反应3 h，最后在100℃下缩聚反应6 h。在矿化度为8246 mg/L的模拟盐水体系中300℃下高温老化24 h后，质量分数1%的AFOP溶液与稠油间的界面张力仍能达到10-1mN/m数量级，油水比为7∶3时对渤海稠油的降黏率仍能保持在98%以上。乳化降黏剂AFOP具有优良的抗盐耐温性能，能够满足海上高温高盐油藏稠油开采的需要。图3表4参23

In order to solve the problem of poor temperature and salt resistance of emulsified viscosity reducers used in chemical flooding and fracturing of heavy oil reserviors，a temperature resistant and salt tolerant emulsified viscosity reducer AFOP was synthesized using bisphenol AF（BPAF），p-hydroxybenzenesulfonic acid（PHSA）and octyl phenol polyoxylene ether（OP-10）as monomers by two steps and three stages method. The structure of AFOP was characterized by IR and GPC. The viscosity reduction effect of AFOP on several kinds of heavy oil at high temperature and high salt was investigated and compared with that of the viscosity reducer used in oil field at the same environment. The optimum synthesis conditions of AFOP was obtained as follows：monomer mass ratio of BPAF to PHSA to OP-10 was 1∶4∶6；under the alkaline condition of the hydroxymethylation stage，the reaction temperature was 80℃ and reaction time was 1.5 h；under the acid condition，reaction temperature was 80℃ and reaction time was 3 h；finally，the polycondensation reaction was carried out at the temperature of 100℃ for 6 h. In the simulated brine system with salinity of 8246 mg/L，the interfacial tension between Bohai crude oil and the AFOP solution with mass fraction of 1.0% after high temperature aging 24 h at 300℃ reduced to 10-1mN/m，and the viscosity reduction rate of heavy oil reached 98% at oil water ratio of 7∶3. AFOP had excellent temperature-resistant and salt-tolerant，and could meet the needs of heavy oil recovery in offshore high temperature and high salt reservoirs.

10.19346/j.cnki.1000-4092.2019.04.028