Facies characterization and classification play critical roles in reservoir description and modeling, facilitating the prediction of 3D reservoir extent and rock properties distribution. The term facies originates from early sedimentologic work and describes rock types with shared traits. The concept of facies has been extended to multiple disciplines at various scales within the broad field of petroleum geosciences including seismic facies, petrophysical facies, geomechanical facies, and geochemical facies. Fit-for-purpose facies classification using diverse data types can add value to all phases of reservoir work including exploration, appraisal, and development. Although quantitative estimates of facies can drive business decisions, the integration...

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