Research Article
A Petrographic Study of the Three Forks Formation (Upper Devonian), Williston Basin, North Dakota: Based on Thin Section Analysis, XRD and SEM
Table 1
Summary of sample information.
| Sample stratigraphic position | Rock type |
porosity (%) | Analysis type | Original texture | RQ |
| Lithofacies 1 (top) | Silty/sandy dolomite | 3% | TS, SEM, and XRD | Dolomudstone | P-M | Lithofacies 3 (middle) | Silty/sandy dolomite | 2% | TS, SEM, and XRD | Dolomudstone | P-M | Lithofacies 4 (lower) | Silty/sandy dolomite | Trace | TS, SEM, and XRD | Dolomudstone | P |
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: thin section; SEM: scanning electron microscopy; XRD: combined bulk and clay XRD Analysis; RQ: reservoir quality.
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