Although almost a century has passed since the beginning of the exploration drilling industry, the science of geomechanics has recently entered the industry. In petroleum geomechanics, a prediction of rock behavior, compaction, failure, and fault in oil and gas reservoirs due to exploitation drilling is investigated. Rock mechanics, as a sub-branch of geomechanics, uses the concepts of continuity, solid mechanics, and geology to determine the behavior of rock environments against environmental stresses. The results show that drilling in the azimuth at about 135° with an angle of about 15° is the most stable path for the well in the carbonate reservoir formation in the studied oil field. A mechanical model of the earth is designed using laboratory data and well logging, and it is validated by the results obtained from laboratory rock mechanics using the calibrated core samples. The Mohr–Coulomb failure criterion is followed to determine a safe mud weight window. Necessary geomechanical parameters are estimated using density and slowness logs of sonic waves (shear and compression).
In this study, stress analysis and its effect on azimuth well in deviated drilling in an oil field located in southwestern Iran are investigated. In constructing a mechanical model of the earth, a combination of environmental geomechanical parameters, as well as the magnitude and direction of stresses, is used. Given the complexities of reservoir exploration and development, it is vital to understand the geomechanical properties of the reservoir and well in the drilling operation.