Little Knife Field CO/sub 2/ minitest, Billings County, North Dakota. Final report. Volume 1. Technical report

Technical Report · Fri Jul 01 00:00:00 EDT 1983

OSTI ID:6018493

Upton, J E

A carbon dioxide minitest was conducted in the Mission Canyon Formation (lower Mississippian) at Little Knife Field, North Dakota. The Mission Canyon is a dolomitized carbonate reservoir which is undergoing primary depletion. Four wells were drilled in an inverted four-spot configuration, covering five acres. The central well served as the injection well and was surrounded by three non-producing observation wells. Oriented cores were cut in each well for detailed reservoir characterization and laboratory testing. In addition, a well test program was conducted which involved two pulse tests and injectivity tests on the individual wells. Results from these tests were used as part of the input data for two reservoir simulation models. Various parameters in the computer models were varied to determine the most efficient injection plan for the specific reservoir characteristics. The pattern sweep efficiency for carbon dioxide approached 52 percent in the minitest area. Displacement efficiency, as indicated by simulation study, was 50 percent of the oil-in-place at the start of the project, compared with an efficiency of 37 percent for waterflood. Thirty-one hundred cubic feet of CO/sub 2/ were required per incremental barrel of displaced oil. The absence of producing wells and the fact that only one zone within the Mission Canyon Formation was flooded, favorably influenced these figures. The Little Knife CO/sub 2/ minitest confirmed, by field testing, the results of laboratory CO/sub 2/ miscible displacement tests. The minitest indicated that the CO/sub 2/ miscible displacement process has technical potential for commercialization in a dolomitized carbonate reservoir that has not been extensively waterflooded and has an indicated high remaining oil saturation. 159 figures, 46 tables.

• Research Organization: Gulf Oil Exploration and Production Co., Oklahoma City, OK (USA)
• DOE Contract Number: AC19-79MC08383
• OSTI ID: 6018493
• Report Number(s): DOE/MC/08383-45-Vol.1; ON: DE83015381
• Resource Relation: Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
CARBON DIOXIDE INJECTION
FIELD TESTS
OIL WELLS
CARBONATE ROCKS
ENHANCED RECOVERY
EXPERIMENTAL DATA
NORTH DAKOTA
PETROLEUM
SWEEP EFFICIENCY
WELL STIMULATION
DATA
ENERGY SOURCES
FEDERAL REGION VIII
FLUID INJECTION
FOSSIL FUELS
FUELS
INFORMATION
MISCIBLE-PHASE DISPLACEMENT
NORTH AMERICA
NUMERICAL DATA
RECOVERY
ROCKS
SEDIMENTARY ROCKS
STIMULATION
TESTING
USA
WELLS
020300* - Petroleum- Drilling & Production