油溶性降黏剂的制备及性能评价

Preparation and Performance Evaluation of Oil-soluble Viscosity Reducer

刘旭超 杜 江 王秋霞 张龙力 刘 昊 赵瑞玉

LIU Xuchao DU Jiang WANG Qiuxia ZHANG Longli LIU Hao ZHAO Ruiyu

为解决渤海 A27-2平台稠油长距离管输时黏度高、 流动性差的问题， 以甲基丙烯酸十八酯 （A）、 苯乙烯 （S）、2-丙烯酰胺基-2甲基丙磺酸 （Xm） 为原料制得三元共聚物降黏剂。通过测定降黏剂对稠油的降黏率研究了各因素对聚合反应的影响， 确定了最佳反应条件， 并用红外光谱仪表征了反应产物的结构。结果表明， 最佳聚合反应条件为： 单体 A、 S、 Xm的摩尔比为 9∶5∶1.5， 反应时间 4 h， 反应温度 80℃， 引发剂过氧化苯甲酰与混合溶剂的加量分别为单体总质量的 2.0%和 320%， 混合溶剂中甲苯与 Ys的质量比为 8∶3。该油溶性降黏剂对稠油的降黏效果较好， 加量为稠油质量 1‰时的降黏率为 59.25%。降黏剂与表面活性剂 OP-10复配后得到复合型油溶性降黏剂， 其加量为稠油质量 10%时的降黏率为82.18%， 可在较低温度下实现稠油管输。图 3表 8参 15

In order to solve the problem of high viscosity and poor fluidity of heavy oil in Bohai A27-2 platform during long-distance pipeline transportation，a terpolymer viscosity reducer with octadecyl methacrylate （A），styrene （S） and 2-acrylamido-2-methylpropanesulfonic acid（Xm）as monomers was synthesized. The effect of various factors on polymerization reaction was studied by measuring the oil viscosity reduction rate of viscosity reducer. The optimal reaction condition was determined and the structure of reaction product was characterized by infrared spectrometer. The experimental results showed that the optimum polymerization condition was obtained as follows：9∶5∶1.5 mole ratio of monomer A∶S∶Xm，4 h reaction time，80℃ reaction temperature，2.0% and 320% the addition of initiator and mixed solvent of the total mass of monomer respectively，and 8∶ 3 mass ratio of toluene to Ys in mixed solvent. The oil-soluble viscosity reducer had a good viscosity-reducing effect on heavy oil. The viscosity reduction rate was 59.25% when the dosage of viscosity reducer was 1‰ of heavy oil. The viscosity reduction rate of heavy oil was 82.18% after 10% composite oil-soluble viscosity reducer contained viscosity reducer and surfactant OP-10 was added，which indicated that the heavy oil could be transported through pipe at lower temperature.