Longitudinal and transverse wave combined stratigraphic dip angle calculation method and device

The embodiment of the invention provides a longitudinal and transverse wave combined stratigraphic dip angle calculation method, and belongs to the field of seismic exploration acquisition, processing and interpretation. The calculation method comprises the following steps: exciting a preset point location at a wellhead of a target area to emit seismic waves, and receiving in-well seismic data generated by the seismic waves through a detector arranged in the wellhead; performing data preprocessing on the first longitudinal wave data and the first transverse wave data to obtain second longitudinal wave data and second transverse wave data; respectively picking up a longitudinal wave first-motion wave of the second longitudinal wave data and a transverse wave first-motion wave of the second transverse wave data; determining a first calculation depth based on the longitudinal wave first arrival wave and the transverse wave first arrival wave; determining a second calculation depth and a third calculation depth a