Numerical simulation of carbon dioxide flooding in fractured reservoirs using generic projection-based embedded discrete fracture model.

This article focuses on the development and integration of a generic projection-based embedded discrete fracture model (pEDFM) with the commercial reservoir simulator ECLIPSE for simulating carbon dioxide (CO₂) flooding in naturally fractured reservoirs. The proposed method constructs an equivalent ECLIPSE model using inter-grid connections and transmissibilities derived from the generic pEDFM, enabling the use of ECLIPSE’s nonlinear solver to efficiently solve complex compositional flow equations without the need for costly solver development. Numerical examples demonstrate that the generic pEDFM significantly improves simulation accuracy and convergence compared to the widely used embedded discrete fracture model (EDFM), effectively handling both high- and low-permeability fractures and complex fracture networks. This integrated approach offers a practical and computationally robust framework for optimizing CO₂ enhanced oil recovery and carbon capture utilization and storage (CCUS) applications in fractured reservoirs.