一剂双效稠油降黏剂的制备与性能评价

Preparation and Performance Evaluation of Double-effect Heavy Oil Viscosity Reducer

于世虎

YU Shihu

为获得耐温抗盐和降黏效果良好的稠油降黏剂，以油酸、N，N-二甲基-1，3-丙二胺、1，3-丙磺酸内酯为原料制备了磺基甜菜碱表面活性剂YJN-1，既能作为油溶性降黏剂又能作为乳化降黏剂，具有一剂双效的功能。研究了YJN-1加量和温度对稠油的降黏效果，考察了YJN-1作为乳化降黏剂时的耐温抗盐性。结果表明，作为油溶性降黏剂时，在50℃、0.5%的加量下，YJN-1对新疆和胜利稠油的降黏率约为91%，降黏效果优于部分商品降黏剂；作为乳化降黏剂时，在50℃下，0.15%的YJN-1对两种稠油的乳化降黏率约为99%；乳液能自动破乳脱水，脱水率为96.4%~98.2%。YJN-1具有良好的耐温抗盐性能，抗盐达85 g/L，耐温达160℃，耐温抗盐和降黏效果良好。图6表4参20

In order to obtain a heavy oil viscosity reducer with good temperature resistance，salt resistance and viscosity reduction，sulfobetaine surfactant YJN-1 was prepared by oleic acid，N，N-dimethyl-1，3-propanediamine and 1，3-propanesultone. YJN-1 could be used not only as an oil-soluble viscosity reducer but also as an emulsifying viscosity reducer，showing a dual-effect function. The effects of YJN-1 dosage and temperature on the viscosity reduction of heavy oil were studied. The temperature resistance and salt resistance of YJN-1 as an emulsifying viscosity reducer were investigated. The experiment results showed that as an oil-soluble viscosity reducer，the viscosity reduction rate of YJN-1 to Xinjiang and Shengli heavy oil was about 91% under the condition of 50℃ and 0.5% dosage，whose viscosity reduction effect was better than that of some commercial reducers. As an emulsification viscosity reducer，0.15% YJN-1 had an emulsification viscosity reduction rate of about 99% for two heavy oils at 50℃. The emulsion could be dehydrated automatically，and the dehydration rate was 96.4%—98.2%. YJN-1 had good resistance of temperature（160℃）and salt（85 g/L），and good viscosity reduction

10.19346/j.cnki.1000-4092.2019.03.025