Facies composition calculated from the sonic, neutron, and density logs suite, upper part of the Minnelusa Formation, Powder River Basin, Wyoming

Journal Article · Fri Jul 01 04:00:00 EDT 1988 · Mt. Geol.; (United States)

OSTI ID:6860739

Schmoker, J W; Schenk, C J

Sandstones and dolomites of the Permian upper part of the Minnelusa Formation are treated here as four-component systems consisting of fluid-filled pore space, quartz, dolomite, and anhydrite. Response equations of sonic, neutron, and density logs, plus the identity that the whole equals the sum of its parts, form a system of four simultaneous equations. With four equations and four unknowns, the composition of upper Minnelusa facies is defined by the three-log suite and can be calculated by solving a 4 x 4 matrix. Such calculations of facies composition help in establishing subsurface correlations and yield information on the diagenesis and physical character of upper Minnelusa sandstones and dolomites. Applications of composition calculations are illustrated by examples drawn from the area of the West Mellott field (T/sub 52/N, R68W), where the upper Minnelusa is at depths of about 7000 ft (2100 m).

• Research Organization: Geological Survey, Denver, CO (USA)
• OSTI ID: 6860739
• Journal Information: Mt. Geol.; (United States), Journal Name: Mt. Geol.; (United States) Vol. 25:3; ISSN MOGEA
• Country of Publication: United States
• Language: English

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580100* -- Geology & Hydrology-- (-1989)
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CARBON COMPOUNDS
CARBONATE MINERALS
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