Porosity Distribution Trends in WolfCamp Strata of the Palo Duro Basin, Texas Panhandle Implications for Ground Water.

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Conti, Robert Downey
Wirojanagud, Prakob

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Average porosity distributions in the Wolfcamp deep-basin aquifer are studied to discern the geographic trends in effective porosity throughout the Palo Duro Basin. Highly resolved, log-derived porosity data are used to improve porosity resolution in computer-simulated areal groundwater modeling. Assessing vertical distributions of lithology and porosity in each of the wells studied involves cross-plotted neutron and density porosity log responses, which more accurately identify lithology and porosity than cross-plotted neutron porosity and acoustic (interval travel time) responses. Subsequent analyses of log-derived porosity distributions yield information about the total effective pore volume (movable water) in the Wolfcamp aquifer, in addition to enhancing the accuracy of estimating deep-brine velocities and travel times in its basin-wide traverse. Northeastward, basin-wide travel times range between 2.5 x 10^5 and 2.0 x 10^6 years, indicating the potential frequency of basin flushing across the basin.


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