Optimal evaluation method for shale gas-water relative permeability measurement

The invention relates to an optimal evaluation method for shale gas-water relative permeability determination, and the method mainly comprises the following steps: S1, preparing a plunger core, drying and cooling at 60 DEG C, and obtaining the quality, length, diameter, absolute permeability, porosity, organic matter content and clay mineral content of the core; s2, calculating the ratio of the soil-to-pore ratio, the clay mineral content and the core porosity; s3, quantitatively evaluating the fracture development degree of the rock sample; s4, classifying the rock samples into a class I, a class II and a class III according to the absolute permeability K, the porosity phi, the organic matter content TOC and the clay mineral content Cclay of the rock samples in the step S1; and S5, according to the shale sample classification, the soil-to-hole ratio and the rock sample fracture development degree, the shale gas-water relative permeability determination method is optimized. According to the method, the gas-wa