Proppant transport simulation method based on three-dimensional pseudo-continuum hydraulic fracturing model

Abstract

The invention discloses a proppant migration simulation method based on a three-dimensional pseudo-continuous medium hydraulic fracturing model, which comprises the following steps of: establishing athree-dimensional pseudo-continuous medium hydraulic fracturing model, introducing model parameters and solving and calculating, and starting to generate new fractures at a certain time; Generating aninitial crack topology; A plurality of topological linked lists represent fracture networks with proppant migration; Automatically merge multiple crack topology links; Remove redundant topology network; Output fracture topology to simulate proppant transport; The simulation of proppant transport based on three-dimensional pseudo-continuum hydraulic fracturing model is realized. The invention effectively solves the proppant migration simulation, optimizes the fracture network topology structure, considers the merging of the topology chain list and the deletion of the redundant topology network, and accelerates the calculation speed of the fracture expansion simulation and the proppant migration simulation.

Description

Technical field [0001] The invention provides a proppant migration simulation method based on a three-dimensional pseudocontinuous hydraulic fracturing model, which belongs to the technical field of hydraulic fracturing simulation. Background technique [0002] After the hydraulic fracture is created, the fracturing fluid carries the proppant into the fracture. When the fracture is closed, the proppant effectively supports the fracture, thereby obtaining a channel with high conductivity and achieving the effect of increasing production. The effective placement of proppant plays an important role in the stimulation effect of fractured wells. Therefore, in the reservoir reconstruction simulation technology, the simulation of proppant migration is very important. [0003] Many factors should be considered in the simulation of proppant migration, such as construction displacement (turbulence effect), fracturing fluid properties (clear water or high-viscosity jelly), proppant properties...

AI Technical Summary

Problems solved by technology

In 2015, Blyton et al. [6] implemented the CFD-DEM method and found that the settlement velocity calculated by Stocks' law is no longer accurate when considering the proppant concentration, Reynolds number and the ratio of proppant diameter to fracture width

However, the existing quasi-continuous geomechanics model cannot determine the location and propagation direction of fractures, let alone carry out cross-simulation of fractures and simulation of proppant migration.

Images