Abstract In this work a numerical simulation model is presented to evaluate the effect on productivity of the filtration, transport and retention of particulate material, as well as geomechanical effects during drilling operations in naturally fractured reservoirs. The model proposed consists of a Black Oil flow simulator developed under a dual permeability approach, coupled to a stress-sensitive fracture width and a filtration models. The phenomenological model studied allows to investigate the effect of the particulate material in the reduction of permeability due to the combined effect of the invasion of solids, and the sensitivity to stress. Laboratory oil displacement tests over a fractured core allowed to calibrate relative permeability curves and fracture conductivity. The system was then subjected to a dynamic filtration experiment, which captured filtration rates and volumes, enabling to calibrate filtration parameters. A successful match of volumes and pressures drop was obtained, assuring the representativeness of the whole model. A well simulation was performed to analyze the effect of fracture properties on productivity. This model complements an effort made by industry and academia to understand the filtration mechanisms occurring in naturally fractured reservoirs, maximize the laboratory investment by means of a unique phenomenological model that couples multiphase transport with solids entrance and mudcake build up equations. This model, together with current mud design technologies will help to novate the way the drilling fluids are being engineered to maximize investment return.