Method for evaluating shale hydration inhibition capability of water-based drilling fluid

The invention provides a method for evaluating shale hydration inhibition capability of water-based drilling fluid, and belongs to the field of shale gas development. The method comprises the following steps: providing a dry shale sample, and testing the lattice interlayer spacing d001 of the dry shale sample; adding quantitative dried shale samples and to-be-evaluated water-based drilling fluid into a reaction flask, stirring at a set temperature, and carrying out centrifugal treatment; collecting hydrated precipitates of the shale sample, and testing the lattice interlayer spacing d001 of the hydrated precipitates; obtaining the difference value [delta]d001 and comparing the difference value with an evaluation standard, and judging the strength of the shale hydration inhibition capacity of the to-be-evaluated water-based drilling fluid; the evaluation standard being as follows: 0.22 > = [delta]d001 > 0, and the shale hydration inhibition capability being strong; 0.5 > = [delta]d001 > 0.22, and the shale hyd