Method for identifying overlying stratum pinch-out line through well-log and seismic data combination

The invention provides a method for identifying an overlying stratum pinch-out line through well-log and seismic data combination. The method comprises the steps of obtaining a stratum diagram of an overlying stratum work area through well drilling data of well completion, and marking a first marker bed, a second marker bed and a to-be-identified pinch-out line target stratum; establishing a seismic profile map and three-dimensional seismic data of the overlying stratum work area through the adoption of a seismic technology, and obtaining horizon structure maps of a first marker bed and a second marker bed on the three-dimensional seismic data according to the seismic technology; and constructing the structural map of the thickness difference between the first marker bed and the second marker bed; and setting a thickness threshold value according to the thickness difference range between the first marker bed and the pinch-out line target stratum in the stratigraphic map of the overlying stratum work area, and