The AAPG/Datapages Combined Publications Database

AAPG Bulletin

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AAPG Bulletin; Year: 2021; Issue: August
DOI: 10.1306/02262118214

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Figure 13. Pie charts showing the difference in bulk and clay mineralogy from volume percent (A), weight percent (B), and volume percent assuming 95% illite microporosity (C) in reservoir-quality Cypress Sandstone. Mineralogy by weight percent (mean volume of microporosity $[V_{m}])$ is taken directly from the x-ray diffraction (XRD) analysis. Volume percent (effective clay mineral volume $[V_{e}])$ is acquired by accounting for clay microporosity in XRD data. Data represent all 56 sample depths from the 3 wells analyzed in this study. ${\bar{ϕ}}_{m}$ = average clay mineral microporosity.

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