Abstract:

Epoxyethylene and epoxypropylene were polymerized by double metal cyanide (DMC) with unsaturated alcohol as initiator.The obtained polyether was sulfonated, and neutralized to prepare a salt-resisting surfactant.The surfactant resisted water salinity in a range of 2000 mg•L^-1 to 150000 mg•L-¹.In addition, the surfactant exhibited significant effect on reducing the surface tension of high salinity water from 80.5 mN•m^-1 to 37.1 mN•m-¹ at 30℃.Moreover, even when the concentration of calcium or magnesium cations in the water reached 10000 mg•L^-1, the surfactant solution remained colorless and transparent without deposition and flocculation.The experiment in oil field indicated that the salt-resisting surfactant reduced the viscosity of water-containing heavy oil from 85000 mPa•s to 14 mPa•s.After demulsification, the intrinsic viscosity of the dewatered crude oil decreased by half.

Key words: α-烯基聚醚, 耐盐活性剂, 高矿化度, 耐盐

摘要：

以不饱和醇作引发剂利用双金属氰化物(DMC)催化加成共聚环氧丙烷、环氧乙烷，然后磺化中和成盐，研制出一种耐盐活性剂。该活性剂的耐受矿化度范围为2000～150000 mg•L-¹。该活性剂不仅能把高矿化度水的表面张力从80.5 mN•m^-1(30℃)降到37.1 mN•m^-1(30℃)，而且即使水中的Ca²⁺、Mg²⁺浓度高达10000 mg•L^-1时，其表面活性剂水溶液也是无色透明的，没有任何沉淀和絮状物。在某油田稠油水中矿化度高达150000 mg•L^-1的稠油降黏实验中发现，该活性剂能使含水稠油黏度从85000 mPa•s(30℃)降到14 mPa•s(30℃)，并且还能使脱水后的原油本体黏度降低一半以上。

关键词: α-烯基聚醚, 耐盐活性剂, 高矿化度, 耐盐