Crustal stress calculation method and device for sand shale interbed tight gas reservoir

The invention provides a crustal stress calculation method for a sand shale interbed tight gas reservoir. The method comprises the following steps of: calculating to obtain a shear wave time difference, and carrying out correlation analysis on the shear wave time difference and a logging shear wave time difference obtained by actual measurement logging to obtain a corrected shear wave time difference after correction; calculating to obtain rock dynamic mechanical parameters, and converting the rock dynamic mechanical parameters into continuous static parameters in combination with discontinuous static parameters obtained by an indoor rock core test; and acquiring crustal stress data through a crustal stress calculation model on the basis of the continuous static parameters, and correcting the crustal stress data by using a field fracturing construction curve and calculated fracture pressure obtained by the fracture pressure calculation model to obtain a crustal stress profile. According to the crustal stress