Stratum pinch-out line identification method based on lithofacies and seismic facies

The invention discloses a stratum pinch-out line identification method based on lithofacies and seismic facies. The method comprises the steps: performing stratum comparative analysis through well drilling and well connection, analyzing stratum lithofacies near a pinch-out line and thickness change characteristics thereof, and establishing a two-dimensional geological model; analyzing the already-drilled well logging data and the actual seismic data to obtain sound wave characteristics, density characteristics, seismic wavelets and seismic dominant frequencies of different lithofacies; performing seismic simulation based on the two-dimensional geological model obtained in the step 2 and the stratum thickness change characteristics, the sound wave characteristics, the density characteristics, the seismic wavelets and the seismic dominant frequencies of the different lithofacies obtained in the step 1, the step 3 and the step 4; superposing the two-dimensional geologic model with a seismic section obtained by s