Abstarct: Carbonate reservoirs in the Middle East are among world's most important reservoirs, thus stimulating the reservoir is of utmost importance. An important way to improve the well production, is to make influence on physics of the reservoir. One of the most important of these methods can be used to create artificial fractures in the reservoir rock. This operation requires a lot of studies before implementing them that geomechanical studies is the most important. The first step is to collect the required data including petrophysical data (such as image log, porosity, density, etc.), information on well completion (type of casing and cement used) and geological information of reservoir. In the next step, using petrophysical data and the empirical relationship, one-dimensional geomechanical models are being established in required fields. The one-dimensional model used for evaluation of stress field around the wellbore, pore pressure, rock strength parameters such as Young's modulus, Poisson's ratio and uniaxial strength of rock. baxsed on this model and according to the results of operations of hydraulic fracturing in other parts of the world, the appropriate interval is selected. The interval should contain a minimum amount of in situ stress and strength parameters. After selection suitable interval, baxsed on conditions of interval and cited characteristics of two dimensional models, action takes to model fracture with Frac CADE and GOHFER. Finally the parametric studies and sensitivity analysis are done. A parametric study on the intrinsic parameters of rock and sensitivity analysis on other parameters are done. Among these parameters, stress, Young's modulus, Poisson's ratio and injection rate are more important.