Modeling Formation Damage for Flow Simulations at Reservoir Scale

Abstract

Summary Formation damage generally is limited to the immediate nearwellbore region and needs a particular near-well-flow modeling using fine gridblocks. However, near-well models are usually developed as standalone models and are decoupled from reservoir models. Using a standalone near-well model that does not take into account production scenarios cannot predict well injectivity or productivity correctly. In this paper, we propose a new technique for the coupled modeling of a near-well-flow model and a reservoir model in a simple and consistent way. In this new approach, data are exchanged and updated through boundary conditions for the near-well model and through numerical productivity indices (PIs) (or skin factors) for the reservoir model. Examples show that this coupled modeling gives quite satisfactory results.