Method for quantitatively testing wettability of powdery rock

The invention provides a method for quantitatively testing wettability of powdery rock. The method comprises the following steps: crushing a rock sample into powder with a certain particle size, and drying; weighing a certain amount of dried sample; sequentially adding a water-based liquid and an oil-based liquid with the same volume into the sample to be detected; fully stirring by a magnetic stirrer, uniformly mixing, and pouring into a separating funnel; respectively and fully cleaning a beaker and the stirrer by using the same water-based liquid and the oil-based liquid, and pouring the cleaning liquid into a separating funnel; standing until a sample in lower-layer liquid in the separating funnel basically sinks to the bottom, then flowing out a powder sample sinking to the bottom from the lower part of the separating funnel, filtering, drying and weighing; and calculating the mass ratio of a hydrophilic powder to an oleophylic powder in the sample. The method provided by the invention can quantify the p