31 results about "Discrete fracture model" patented technology

The invention provides an in-crack temporary plugging diversion fracturing simulation method and equipment. The method comprises the following steps: constructing a discrete fracture model based on a discrete element method; combining the fluid flow equation and the rock mass deformation equation based on a weak coupling method, performing discrete and iterative processing on the fluid flow equation to obtain in-crack fluid pressure, and inputting the in-crack fluid pressure into the rock mass deformation equation to obtain crack width; acquiring stress borne by the virtual spring based on the crack width, judging whether the virtual spring is fractured or not according to the stress borne by the virtual spring and the maximum stress of the virtual spring, and if yes, expanding the crack; a dominant expansion path of fluid is obtained based on fracture expansion, a temporary plugging unit is arranged on the dominant expansion path, and simulation of in-fracture temporary plugging diversion fracturing is achieved. The influence of different reservoir parameters, natural fracture distribution and mechanical parameters, temporary plugging parameters and the like on fracture expansion behaviors can be quantitatively studied, and a basis is provided for in-fracture temporary plugging diversion fracture simulation and design optimization.

The invention provides a novel method for characterizing a complex fracture system of a deep shale gas reservoir, which comprises the following steps of: dividing a single well into a natural fracture single well, an artificial fracture single well and a natural fracture and artificial fracture coupled single well according to fracture information of the single well, generating a fracture network model diagram of the single well by adopting a Monte Carlo method in combination with a discrete fracture model, based on the permeability of a fractured low-hole shale reservoir, a single well is divided into an inner area and an outer area by adopting a radial composite model, a dual-hole medium model and a discrete fracture model are combined according to the continuity and heterogeneity of reservoir fractures, and a natural fracture, an artificial fracture and a complex fracture system with the natural fracture and the artificial fracture coupled are subjected to a single-well separation method. And carrying out characterization. The characterization method for the single well complex fracture system is formed, reservoir parameters and fracture parameters can be accurately inverted, the reliability of fracture characterization is improved, and efficient exploration and development are effectively supported.