The invention discloses a discrete element-based three-dimensional fault / fracture network modeling method and device under a backlash pushing and
covering system, and relates to the technical field of three-dimensional
fault modeling, and the method comprises the steps: building an initialized
fault plane model based on the seismic
logging information parameters of a target region; extracting stratum parameters of the target area, and determining a deformation process in combination with an equilibrium profile
recovery method; the method comprises the following steps: calibrating mesoscopic parameters of discrete elements according to stratum parameters, depositing a first
discrete element model, optimizing and generating a second
discrete element model, setting boundary conditions to carry out back-flushing pushing-covering
simulation, comparing an output result of the second
discrete element model with an actual
geological section, adjusting
model parameters until the output result and the actual
geological section are matched, and establishing a three-dimensional fault and fracture network. And analyzing and establishing
spatial distribution characteristics of the target area, and carrying out dynamic evaluation and
trend prediction on the activity of the three-dimensional fault. According to the method, the geomechanical model is fused, the subjectivity of
manual interpretation is overcome, and the problems of fault tip extension and the like in grid reconstruction are effectively avoided.