Abstarct: Fractured reservoirs are not only most common oil reservoirs, but also one of the most complexes in modeling and analysis. Due to the nature of the fractured reservoirs and the effect of tectonic and Diagenesis processes on these reservoirs, there are many fractures and heterogeneities in these types of reservoirs which make modeling time-consuming and effortful. In reservoirs that fractures are not widespread, it can usually be done by simplifying the effect of fractures. But wiping out widespread fractures in the reservoir greatly exacerbates the results. In this research, permeability and stability of wellbore walls in one of the wells of Parsi field has been studied. Due to tectonic conditions, fracture density is extra ordinary high. To this, petrophysical logs were used to calculate the rock mechanical parameters of reservoir. Then, safe mud weight window was obtained. Moreover, Dip and dip direction of fractures on wellbore walls were studied with result of Borehole image logs (FMI) and classified with DIPS Software. The Easy Fit software was used for statistical analysis of fractures as well. A Discrete fracture network (DFN) was constructed. In the next step, by constructing the reference model (REV), permeability was calculated and compared with the actual measured values. These comparisons showed fair conformity of model with reality. Eventually, in order to investigate the necessity of Discrete fracture network modeling in fractured reservoirs, parametric study and sensitivity analysis were applied to investigate the effect of different factors affecting permeability and wellbore wall stability. The results show that ignoring fractures and simplifying them in the modeling of fractured reservoirs can lead to inaccurate conclusions in fractured reservoirs.