Computer-aided geological characterization of a sandstone reservoir, North Ward Estes field, Ward and Winkler Counties, Texas

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6116668

Wylie, Jr, A S; Davidsen, E K; Gillespie, J D; Butler, R S

The North Ward Estes field is located along the western edge of the Central Basin platform in Ward and Winkler Counties, Texas. The field is part of an upper Guadalupian productive trend that extends uninterrupted for 90 mi on the edge of the platform. The North Ward Estes field has produced over 350 million bbl of oil (one-third of the trend's cumulative production) from more than 3,000 wells since its discovery in 1929. Production in the field is from back-reef lagoonal siliciclastics (sandstones) of the Yates, Seven Rivers, and Queen Formations. A correlation scheme was developed for the field based on laterally continuous key dolomites that bracket the productive sands and segment the reservoir into discrete mappable units. Applying this scheme, more than 60,000 correlation markers were selected and loaded into a computer database. Concurrently, 15 million curve feet of log data and 30,000 ft of core analysis data were digitized. Core analyses were depth corrected. Logs were normalized using a 60-ft interval of laterally continuous anhydritic dolomite. Core porosity data were cross plotted vs. bulk-density log values to develop equations (transforms) for derivation of porosity. Corrections for hole rugosity, overburden pressure, and lithologic complications were applied to refine the porosity transform. Structure and porosity-feet maps were then merged with fluid contact and water saturation data to calculate volumetrics.

• OSTI ID: 6116668
• Report Number(s): CONF-880301-
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
COMPUTERIZED SIMULATION
DEPOSITION
DOLOMITE
FEDERAL REGION VI
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC HISTORY
GEOLOGIC MODELS
GEOLOGY
GEOPHYSICS
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MAPPING
MIGRATION
MINERAL RESOURCES
MINERALOGY
MINERALS
NORTH AMERICA
OXYGEN COMPOUNDS
PALEOZOIC ERA
PERMIAN PERIOD
PETROLEUM DEPOSITS
PETROLEUM GEOLOGY
POROSITY
RESERVOIR ROCK
RESOURCES
ROCKS
SANDSTONES
SATURATION
SEDIMENTARY ROCKS
SILICATES
SILICON COMPOUNDS
SIMULATION
TEXAS
USA
WATER SATURATION
WELL LOGGING