The in-situ stress field could govern the mechanical response of a formation to drilling, stimulation, and depletion. Therefore, the in-situ stresses are essential input parameters for all geomechanical analyses, regardless of the complexity of the problem. The determination of in-situ stresses should include both the magnitude and direction of all the principal stress components. An accurate estimation of the in-situ stress field is a prerequisite for a robust and reliable geomechanical analysis.

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