Unconventional oil and gas reservoir horizontal well section full-fracture-length fracturing parameter analog method and device

The invention provides an unconventional oil and gas reservoir horizontal well section full-fracture-length fracturing parameter analog method and device. The method includes the steps of determining an unconventional oil and gas reservoir horizontal well section object region; obtaining three-dimensional earthquake prestack gathered data in the object region, conducting elastic parametric inversion and obtaining a three-dimensional space elastic parameter data body, wherein the three-dimensional space elastic parameter data body comprises a rock mass poisson ratio and Young modulus; calculating a rock mass brittleness index according to the rock mass poisson ratio and the Young modulus; establishing a rock mass mechanical parameter model based on three-dimensional grid nodes according to the three-dimensional space elastic parameter data body and the rock mass brittleness index; calculating stress information on the three-dimensional grid nodes, and generating a three-dimensional stress field distribution mo