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DEVELOPMENT OF TECHNIQUES FOR OPTIMIZING SELECTION AND COMPLETION OF WESTERN TIGHT GAS SANDS

The Phase I report pointed out the similarity between the fluvial Cretaceous Farrer Formation and the fluvial Cretaceous Cedar Mountain Formation in East Central Utah. The study also shows that a strong correlation exists between the vector sum azimuth, 8, of the small scale paleocurrent indicators and the long ax~s of these low sinuosity channel fill sandstones. The Phase II report indicated that there was generally a difference in the characteristics of the small scale paleocurrent indicators between the fluvial Farrer beds and the Castlegate marine, the Sego marine marginal and the Wasatch (Green River) lacustrine and marginal lacustrine beds. It further indicated that paleocurrent direction indicators should be detected by high resolution geophysical logs. The Phase III report presented a correlation of geophysical log, core and outcrop information from the GC-1 area in Grand County, Utah. Unfortunately, the correlation was more qualitative than quantitative and pointed out the need for upgrading the tools . The Phase IV report extended the continuity studies previously made in the Western Piceance and Eastern Uinta Basins to the Green River and Wind River Basins of Wyoming. The continuity was found to be somewhat higher in the Wyoming basins, and low permeability microlayers much more prevalent as separators of the small scale sedimentary structural features. The Phase V report summarized a characterization of some of the Cretaceous and Paleozoic fluvial beds in the Green River and Wind River Basins. Stochastic models of the permeability tensors of the characterized beds might be developed if additional data on the permeabilities of the thin low permeability separating layers can be obtained. The Phase VI report presents the results of a detailed study of the Rifle Gap area in Colorado and makes a prognosis of the reservoir geometric characteristics of the fluvial Mesaverde target section at the U.S. Department of Energy multiwell experiment site. The prognosis is based on an extrapolation of the Rifle Gap study results 12 miles southwest to the multiwell area.

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Author C.F. Knutson
Last Updated July 11, 2014, 13:28 (EST)
Created July 11, 2014, 13:24 (EST)
Citation Knutson, C.F., DEVELOPMENT OF TECHNIQUES FOR OPTIMIZING SELECTION AND COMPLETION OF WESTERN TIGHT GAS SANDS, 1981
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Publication Date 1981-09-01