One of the main considerations for planning of hydraulic fracturing is its impact on the increase of recoverable hydrocarbon. The brittleness parameter is known as a tool for evaluation of formation’s potential in terms of the fracture network generation of hydrocarbon movement in the hydraulic fracturing process. Brittleness can be estimated directly from methods such as stress-strain measurement on the core in a laboratory, measurement of rock elastic properties, or analysis of mineral content using petrophysical analysis of well logs. However, the estimated brittleness using these methods only provides an estimation around the well, but by the methods based on seismic data, brittleness can be estimated in the whole field. In this study, the brittleness is estimated in the whole field using pre-stack seismic inversion and extracting geomechanical parameters cubes, including Young's modulus and Poisson ratio and their integration with well data in an oil field, and the results are discussed.