基于多重光散射技术研究油田用缓蚀剂乳化倾向

Emulsification Tendency Research of Oilfield Corrosion Inhibitor by Multiple Light Scattering Technique

采用基于多重光散射技术的Turbiscan Lab稳定性分析仪,分析了加入咪唑啉类(a)、醇胺类(b)和苯并三氮唑衍生物类(c)三种缓蚀剂的油水两相乳状液中液滴的运动行为,得到了背散射光强度的变化曲线。根据相关规范所定稳定性与乳化倾向关系,从微观和宏观分析了造成三种缓蚀剂产生乳化倾向的原因。结果表明,在10min和60 min时,试样b出水多,油水界面分层明显。0数10 min内,a、b和c试样中分散相液体粒子的平均速率分别为130.055、1385.460和101.501μm/min,粒径为39.3、128.0和34.7μm。用Turbiscan Easysoft软件计算得到60 min时a、b和c试样的稳定性指数分别为11.80、15.65和11.74。试样c中出水量小,微小液滴的平均速率和粒径都较小,不易于油相聚集上浮和水相的沉降,稳定性较好,对应的乳化倾向最大;b组油水两相分离速度较快,出水量大,背散射光变化量较大,乳化倾向最小。

Effect of three kinds of new corrosion inhibitors,including imidazoline(a),alcohol amine(b)and benzotriazole derivative(c),on the motion behavior of oil droplets in oil and water emulsions was analyzed by using Turbiscan Lab stability analyzer with multiple light scattering technique,and their change curves of transmitted and backscattered light intensities were obtained. The causes of their emulsification tendency were analyzed according to the micro and macro analysis and some other aspects. The results showed that compared with other samples,sample b separated the most water and emerged a clear oil and water boundary after setting for 10 and 60 minutes. The average rate of liquid droplets in the dispersion phase of sample a,b and c within10 minutes was 130.055,1385.460 and 101.501 μm/min,and the average diameter of that was 39.3,128.0 and 34.7 μm,respectively. The stability index of sample a,b and c was 11.80,15.65 and 11.74 in 60 minutes that was calculated by Turbiscan Easysoft software. Sample c showed little water separation,low moving speed and small diameter for liquid droplets,tough coalescence between oil droplets and floating,good emulsion stability and the strongest emulsification tendency. Sample b showed the fastest rate and the biggest volume of water separation,a large amount backscattering change and the smallest emulsification tendency.