Shale porosity distribution uniformity evaluation method

The invention provides a shale porosity distribution uniformity evaluation method. The method is characterized in that a rock evaluation material is provided, the rock evaluation material comprises a shale porosity distribution uniformity coefficient hu, hu=d60/d10, and d10 is named as the effective aperture, in other words, pores smaller than the aperture account for 10% of the total pore volume; d60 is named as the control aperture, in other words, pores smaller than the aperture account for 60% of the total pore volume, when hu is larger than 10, it shows that the rock material pore distribution is uniform, and when hu is smaller than or equal to 10, it shows that the rock material pore distribution nonuniform. The rock porosity distribution uniformity evaluation method by the adoption of the coefficient includes the steps of 1, preparing a sample for a mercury injection experiment; 2, obtaining distribution of pores of different sizes of the sample; 3, obtaining the control aperture and the effective aperture of the sample; 4, evaluating the sample porosity distribution uniformity through the porosity distribution uniformity coefficient. The method is applicable to porosity distribution uniformity evaluation of various rocks, including shale, in the civil engineering, the geological engineering, the gas engineering, the petroleum engineering and the like.