利用废弃动植物油脂合成钻井液用润滑剂的研究与应用

Research and Application of New Lubricant Synthesized by Waste Animal/Plant Oil for Drilling Fluid

以废弃动植物油脂、乙醇胺、对甲基苯磺酸、双氧水和白油为原料,制得棕褐色的钻井液用润滑剂BZ-BL,其密度为0.9 g/cm3、凝固点-15℃、荧光级别为3级。合成BZ-BL的最佳条件为:乙醇胺加量7%、催化剂对甲基苯磺酸加量5%、反应温度135~140℃、反应时间4 h。性能测试结果表明:加入0.5%BZ-BL后,4%盐水浆和饱和盐水浆润滑系数降低~分别为76.9%和67.4%,抗盐能力良好,抗温达180℃。对现场聚合物、硅基和钾盐聚合物体系井浆的流变性和滤失性能影响较小,提高了三种井浆的润滑性,配伍性良好。不影响水中生物的生长,对环境友好。在大港油田10余口井的现场应用表明,BZ-BL具有优异的润滑性能,与各种钻井液添加剂配伍性好,不污染环境,可满足深井、大位移井、水平井等钻井作业要求,是环境敏感地区勘探开发理想的处理剂,应用和推广前景较好。

A tan drilling fluid lubricant BZ-BL was synthesized using waste animal/plant oil,ethanolamine,p-toluene sulfonic acid,hydrogen peroxide and white oil as raw material. The density,freezing point and fluorescence grade of lubricant was 0.9 g/cm3,-15℃ and 3,respectively. The optimum synthesis condition of lubricant was obtained as follows: 7% ethanol amine,5%p-toluene sulfonic acid,135—140℃ reaction temperature and 4 h reaction time. The performance test results showed that the reduced rate of lubricating coefficient of 4% brine and saturation brine mud was 76.9% and 67.4% respectively,which indicated good salt resistance,and the temperature resistance was up to 180℃. The effects of BZ-BL on rheological property and filtration property of polymer,silicate-based and potassium-based mud were small. The application of BZ-BL in more than 10 wells on site showed that the lubricant had good lubricating property and good compatibility with drilling fluid additives. It was friendly to the environment,which could be used at deep,highly-deviated,horizontal wells,and exploration and development of environmental sensitive region.