Most reservoirs in Iran are in the second half of their lifespan, and their production rate has been reduced since they exist in a pressure decline phase. Hydraulic fracturing is a technique used to increase production in these reservoirs. Hydraulic fracturing is a well-stimulation technique, which is proper for low and medium-permeability reservoirs that cannot provide cost-effective production even after the removal of the damage caused by acidization. Acid is injected into the formation under a pressure that is higher than the pressure of formation fracture. This kind of stimulation creates a new fracture and enlarges the previous cracks and fractures opening a way for oil or gas to flow from the formation to the well. In this study, sensitivity analysis has been done on parameters of fracture design, including permeability and fracture opening within various scenarios. The extant study examined the effect of these parameters' variation on the oil production rate of the reservoir and introduced the best production scenario