Petrophysical rock typing of unconventional shale plays : a case study for the Niobrara Formation of the Denver-Julesburg (DJ) Basin
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A petrophysical rock typing has been performed based on a methodology that integrated depositional and petrophysical rock analysis to identify distinct rock types in the Niobrara Formation of the Denver-Julesburg (DJ) Basin. The depositional rock analysis incorporated a literature study, interpretations of the geologic depositional setting and sequence stratigraphy, core descriptions, and analysis of well-log data. The petrophysical rock analysis was carried out using experimental core data on mineralogy, pore characterization, source rock evaluation, micro-textural image analysis, and ultrasonic ...