黑液是碱法造纸产生的废液。可将黑液，表面活性剂和聚合物组成黑液体系用于驱油。若用准三组分相图确定黑液体系配方点，然后驱油试验测定各配方点的采收率增值，则可绘出采收率增值等值图，该图可以提供优化配方点和优化配方区等，结合其他等值图（润湿指数等值图、界面张力等值图、乳化不稳定系数等值图等）还可研究黑液体系的驱油机理等。 Black liquor is produced by the alkaline paper waste. Black liquor, surfactant, and polymer make up a black liquor system for flooding. If the quasi-three-component phase diagram is used to determine the black liquor system recipe points and then the oil displacement test measures the recovery value for each recipe point, a contour map of recovery values ​​can be plotted that provides optimized recipe points and optimization Formula area, combined with other contour maps (wetting index contour map, interfacial tension contour map, emulsification instability coefficient contour map, etc.) can also study black liquid system of the oil displacement mechanism.