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２０世纪９０年代，大型的沙特阿拉伯油田油水乳化问题显著增加。油水分离问题使分离器短路、设备跳闸等事故不断发生，并且使破乳剂用量不断增加。在综合研究中，使用用于测定乳状液稳定性的新的油水分离指数，对含水、温度、剪切、沥青质含量、破乳剂用量以及不同原油的混合进行了量化研究。结果表明，原油中的沥青质含量与油水分离指数或乳状液强度有很大关系。
In the 1990s, the issue of oil-water emulsification in the large Saudi Arabian oilfield increased significantly. Oil-water separation problems make the separator short-circuit, such as equipment tripping accidents continue to occur, and the amount of demulsifier continues to increase. In a comprehensive study, a new oil-water separation index used to determine emulsion stability was used to quantify water, temperature, shear, asphaltene content, demulsifier usage, and blend of different crude oils. The results show that the asphaltene content of crude oil and oil-water separation index or emulsion strength has a great relationship.