Method for evaluating shale stratum borehole wall stabilizing capacity of drilling fluid based on acoustoelectric response

The invention discloses a method for evaluating the shale stratum borehole wall stabilizing capacity of drilling fluid based on acoustoelectric response. The method comprises the steps: carrying out well drilling, coring and drying on a shale stratum to be drilled; calculating the density, the longitudinal wave velocity and the resistivity of a test sample; putting the sample into an aging tank ora high-temperature and high-pressure water loss instrument, adding a drilling fluid to be evaluated, enabling the drilling fluid to completely immerse a plunger core sample, applying pressure, and enabling the aging tank or the high-temperature and high-pressure water loss instrument to be at a soaking temperature; after soaking is finished, carrying out cooling, releasing the pressure, and taking out the soaked sample; measuring the length, the diameter and the mass of the sample soaked in the drilling fluid, calculating the density, testing the longitudinal wave velocity and the resistivityof the sample, and calcul