Using a multiple log approach to evaluate Green River oil shale in the Piceance Creek Basin

Conference · Fri Apr 01 00:00:00 EST 1983 · Oil Shale Symp. Proc.; (United States)

OSTI ID:5287047

Habiger, R; Robinson, R H

A method has been devised for predicting modified Fischer assay yield from conventional logs in the Piceance Creek Basin of Colorado. The traditional approach for using well logs to predict oil shale richness has been to relate one of the porosity tool responses to the modified Fischer assay. This approach is unsatisfactory when there is significant lithology variation in the oil shale rock. This study involves an exploration area of 86 Km/sup 2/ in Rio Blanco County, Colorado. Fifteen coreholes were drilled on the property to provide the data base for development of the method. The method describes the rock in terms of a simple lithology model consisting of: carbonate, clay, porosity, and organic matter. Since each of these quantities can vary independently, the simple approach of using only one porosity tool does not work. Instead, the density, sonic, and resistivity logs are used in combination to isolate the amount of organic matter by predicting the modified Fischer assay. Problems related to log data variability and core data quality will also be discussed.

• Research Organization: Phillips Petroleum Co., Bartlesville, OK
• OSTI ID: 5287047
• Report Number(s): CONF-830434-
• Journal Information: Oil Shale Symp. Proc.; (United States), Conference: 16. oil shale symposium, Golden, CO, USA, 13 Apr 1983
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
OIL SHALE DEPOSITS
GAMMA-GAMMA LOGGING
RESISTIVITY LOGGING
SONIC LOGGING
OIL SHALES
FISCHER ASSAY
LITHOLOGY
POROSITY
CARBONATE ROCKS
CLAYS
COLORADO
DRILL CORES
FORECASTING
GEOLOGIC MODELS
GREEN RIVER FORMATION
ORGANIC MATTER
PICEANCE CREEK BASIN
WELL LOGGING EQUIPMENT
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
ELECTRIC LOGGING
ENERGY SOURCES
EQUIPMENT
FEDERAL REGION VIII
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
MATERIALS
MINERAL RESOURCES
NORTH AMERICA
RADIOACTIVITY LOGGING
RESOURCES
ROCKS
SEDIMENTARY ROCKS
USA
WELL LOGGING
040201* - Oil Shales & Tar Sands- Site Geology- (-1989)