Natural fractures and drilling-induced wellbore failures provide critical constraints on the state of stress in situ and direct applicability to problems of reservoir production, hydrocarbon migration, and wellbore stability. Acoustic, electrical, and optical wellbore images provide the means to detect and characterize natural fracture systems and discriminate these from induced wellbore failures. We present several new techniques to measure and characterize attributes of natural and induced fractures in borehole image data. These techniques are applied to the characterization of fracture permeability in two case studies.

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