A NOVEL APPROACH IN MODELLING FLUID FLOW IN UNCONVENTIONAL RESERVOIRS INCORPORATING VISCOUS, INERTIAL, DIFFUSION, DESORPTION AND ADVECTION FORCES CONTRIBUTIONS

A model for single-phase fluid flow in tight UCRs was previously produced by modifying the flow Forchheimer's equation. The new modification addresses the fluid transport phenomena into three scales incorporating a diffusion term, a desorption term and an advection term. In this study, a new model has been numerically validated and verified using synthetic data. Ideally, the new model suits fluid flow in tight UCRs. The modified Forchheimer's model presented, produced very simple profiles and flow dynamics of the main flow parameters have been established and a thorough parametric analysis and verifications were performed. It has been observed that a system containing the aforementioned forces becomes more prominent in regulating flow velocity with low permeability of the formation rock and low viscosity of the flowing fluid. The findings indicate a behavioral alignment with a previous hypothesis that matches actual reservoir behavior.