耐温耐盐乳化降粘剂的结构设计及其构效关系

Structure design and structure-function relationship of emulsified viscosity reducers with temperature resistant and salt tolerant

摘要:

室内研制了以双酚AF（BPAF）、对羟基苯磺酸（PHSA）、聚氧乙烯辛基苯酚醚-10（OP-10）为原料的乳化降粘剂AFOP-10（阴-非离子型乳化降粘剂），测试了AFOP-10的表面性质和耐温耐盐性能，研究了该降粘剂结构与性能的关系，初步探究了该降粘剂的降粘机理。研究结果表明，乳化降粘剂AFOP-10的HLB值为11.37，浊点（Tk）为75℃，临界胶束浓度（cmc）为0.08 g/L，AFOP-10的表面张力γcmc=30.30 mN/m，具有较好的表面活性。该降粘剂热降解温度高达363℃，单体配比n（BPAF）∶n（PHSA）∶n（OP-10）=1∶6∶9时，降粘剂最高可耐盐浓度为49476 mg/L，用矿化度为8246 mg/L的盐水配制的降粘剂溶液经300℃、24 h高温老化处理后仍具有良好的活性，降粘率可达98.50%以上，且对渤海油田不同油区的油品都有较好的乳化降粘效果，具有良好的普适性。

Abstract:

AFOP-10（anionic-nonionic emulsified viscosity reducer）was synthesized from bisphenol AF(BPAF), p-hydroxybenzenesulfonic acid(PHSA), and polyoxyethylene octyl phenol ether-10(OP-10). The surface properties, the temperature resistance and salt tolerance performance was tested. The structure-function relationship was studied, and the mechanism of the emulsified viscosity reducer was preliminarily explored. The results showed that the HLB of AFOP-10 was 11.37, the turbidity point(Tk) was 75℃, the critical micelle concentration（cmc）was 0.08 g/L, and the surface tension of AFOP-10 was 30.30 mN/m. AFOP-10 showed good surface activity. The thermal degradation temperature of AFOP-10 was 363℃. The maximum salt-tolerant concentration of the emulsified viscosity reducer was 49476 mg/L with the molar ratio of BPAF, PHSA and OP-10 1∶6∶9. In the simulated brine system with salinity of 8246 mg/L, AFOP-10 still had good activity after aged at 300℃ for 24 h. The viscosity reduction rate could reach more than 98.50%. AFOP-10 had good emulsification and viscosity reduction effect on oils in different areas of Bohai Oilfield, and it had good universality.