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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract

AAPG Bulletin, V. 90, No. 12 (December 2006), P. 1869-1882.

Copyright copy2006. The American Association of Petroleum Geologists. All rights reserved.

DOI:10.1306/06140605099

Previous HitSequenceNext Hit-stratigraphic Previous HitanalysisNext Hit using Previous HitwellNext Hit cuttings, Mississippian Greenbrier Group, West Virginia

Thomas C. Wynn,1 J. Fred Read2

1Department of Geosciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061; present address: Department of Geology and Physics, Lock Haven University, Lock Haven, Pennsylvania 17745; [email protected]
2Department of Geosciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061

ABSTRACT

Previous HitWellNext Hit-cuttings Previous HitanalysisNext Hit predates modern carbonate facies Previous HitanalysisNext Hit, Previous HitsequenceNext Hit stratigraphy, seismic reflection surveys, and advanced geophysical logging techniques. These newer methods have resulted in Previous HitwellNext Hit cuttings becoming less important as a major source of data for high-resolution subsurface Previous HitanalysisNext Hit. Binocular Previous HitanalysisNext Hit of Previous HitwellNext Hit-indurated Paleozoic Previous HitwellNext Hit cuttings can be used to construct detailed vertical facies successions in wells when tied to wire-line logs. Facies Previous HitanalysisNext Hit can then be used to construct higher resolution Previous HitsequenceNext Hit-stratigraphic frameworks and time-slice maps. This approach was tested on Mississippian carbonates in the Appalachian Basin of West Virginia. The Previous HitanalysisNext Hit was done using the washed coarse fraction (1–2 mm; 0.04–0.08 in.) of the cuttings for each sample interval, classified according to Dunham rock type, counted to determine relative abundance, and plotted as percent lithology versus depth for each Previous HitwellNext Hit. Digitized wire-line logs and the cuttings-percent logs were adjusted (typically 10 ft [3 m] or so) to consider drilling lag, lithologic columns were produced from the combined data, and sequences were picked. Gamma-ray markers were used to correlate the sections, and Previous HitsequenceNext Hit-stratigraphic cross sections were produced. Time-slice maps were generated that show the thickness of the individual sequences and the distribution of major facies within systems tracts. This approach generated a rock-based, high-resolution Previous HitsequenceTop framework for the reservoir and led to a much better understanding of controls on the distribution and stacking of reservoirs.

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