A New Reservoir Scale Model for Fracture Propagation and Stress Reorientation in Injection Wells

摘要

This work describes the development of a fully coupled geomechanics and multiphase flow formulation to model dynamic propagation of injection-induced fractures, in a three dimensional poro-thermo-elastic reservoir domain. A dynamic filtration model for permeability reduction is employed on the fracture to incorporate effects of internal damage and external filter cake build-up due to suspended solids injection. The formulation for arbitrary fracture propagation is based on a finite volume implementation of the cohesive zone model, which is coupled with multiphase flow in the reservoir domain with multiple injection wells and fractures. This is the first instance where a finite volume formulation of multiphase flow in the reservoir has been coupled with induced fracture propagation by plugging of suspended solid particles, in a poro-thermo-elastic domain.