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May Luncheon - Maxwell Pommer, Stratoscope Geologic
May Luncheon - Maxwell Pommer, Stratoscope Geologic

Wed, May 07

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The Clubs of Prestonwood

May Luncheon - Maxwell Pommer, Stratoscope Geologic

Pore systems in oil-window claystones and dolomudstones of lower Green River Formation (Castle Peak Shale through Lower Garden Gulch), Uinta Basin, Utah

Time & Location

May 07, 2025, 11:30 AM – 1:00 PM

The Clubs of Prestonwood, 15909 Preston Rd, Dallas, TX 75248, USA

About The Event

Stratigraphic, petrographic, geochemical, and petrophysical data from a core in the Central Basin region of the Uinta Basin indicate abundant hydrocarbon-saturated reservoir porosity in lower Green River Formation organic-matter(OM)-rich and OM-bearing mudrocks. Poresystems in these rocks are interpreted to have evolved with variable detrital and near-surface diagenetic components and fabrics overprinted by differential burial diagenesis into the oil window (mean Ro=0.97). The core spans ~1,100ft of section from the Castle Peak Shale to the Lower Garden Gulch. It is comprised predominantly of cyclically interbedded: 1) sandstones and sandy conglomerates, 2) OM-lean siliciclastic mudrocks, 3) OM-bearing and OM-rich siliciclastic mudrocks and argillaceous conglomerates, and 4) OM-bearing and OM-rich carbonate mudrocks and intraclast rudstonesfloatstones. Substantial pore volumes occur in sandstones and sandy conglomerates (mean=8.8%), as well as OM-lean siliciclastic mudrocks (mean=9.9%), predominantly comprised of clay-hosted and interparticle micro/nanopores, however these tend to be water-saturated (mean=63.5 and 75.3% respectively). OM-rich and OMbearing siliciclastic…

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