Cotton Valley sandstones of east Texas: a log-core study

Conference · Fri Jan 01 04:00:00 EST 1982 · Trans. SPWLA Annu. Logging Symp.; (United States)

OSTI ID:5812041

Wilson, D A; Hensel, Jr, W M

The Cotton Valley sandstone is associated with many fields in east Texas and north Louisiana and is of upper Jurassic age. The sand-shale sequence is encountered at depths ranging from 8000 to 12,000 ft. The average reservoir temperature is 250 F. The gross sand interval may be 1500 ft thick with many correlative producing zones. It is typified by low porosities and permeabilities. Hydraulic fracturing is almost a universal practice. Many productive zones exhibit water contacts, therefore, the sizing of fracture treatments becomes critical. The first priority is to identify potentially productive intervals. This can only be accomplished through accurate calculations of porosity and water saturation. Test conducted on reservoir rock material aid in the evaluation of log responses. Such tests provide a base for selecting the best logging tools for determining porosity. They provide measured values for variables required in water saturation formulas and confirm lithologies indicated from log calculations. 12 references.

• OSTI ID: 5812041
• Report Number(s): CONF-8207114-
• Conference Information: Journal Name: Trans. SPWLA Annu. Logging Symp.; (United States) Journal Volume: 1
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
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COMMINUTION
DEPTH
DIMENSIONS
FEDERAL REGION VI
FRACTURING
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GEOLOGIC DEPOSITS
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JURASSIC PERIOD
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WATER SATURATION
WELL LOGGING
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