Big Muddy Low Tension Flood Demonstration Project. Seventh annual report, April 1984-March 1985

Technical Report · Sun Dec 01 04:00:00 EST 1985

OSTI ID:6323160

Mosley, M K

The Big Muddy Low Tension Flood is a commercial-sized demonstration project consisting of nine 10-acre injection patterns in the heart of the Big Muddy Oil Field located 15 miles east of Casper, Wyoming. The main goal of this project is to provide data for commercialization of the low-tension process for the Big Muddy Field and other similar Wyoming and Colorado reservoirs. This report discusses the onset of the early oil cut decline and analysis of project performance, and tracer responses begun in the Sixth Annual Report. Tests to obtain diagnostic data which might indicate corrective action are also discussed. The oil rate decreased during 1984-85 from over 200 BPD to 85 BPD in March 1985. The oil cut as a percent of injection remained essentially constant at about 12% after a decline from December 1983 through April 1984. There were some fluctuations in this cut as injection rates were reduced in an attempt to improve sweep efficiency. The decreased injection was part of a test to observe the effect on oil cut decline. Cumulative injection matched production for 1984. Step-rate tests were conducted in November 1984 to determine the parting pressure in each well. The average parting pressure was determined to be about 1100 psi which was about 100 psi below the average operating pressure. The injection rate was reduced in early January 1985 such that pressures were less than parting pressure in most wells. Oil cut trends were closely monitored. Injected components were also monitored in produced liquids for possible changes. The early results suggest that the oil cut has increased slightly from 12% since January 1985. The findings in this study have led to a greater awareness that in any slug process: (1) the slug must be efficiently pushed through the reservoir in order to maintain the oil bank saturation ahead of the slug, and (2) the slug must be carefully contained within the designed volume and protected from mixing with extraneous fluids. 43 figs., 7 tabs.

• Research Organization: Conoco, Inc., Casper, WY (USA)
• DOE Contract Number: AC03-78SF01424
• OSTI ID: 6323160
• Report Number(s): DOE/SF/01424-56; ON: DE85000148
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ADDITIVES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON 14
CARBON ISOTOPES
CHALCOGENIDES
COBALT 60
COBALT ISOTOPES
DATA
DEMONSTRATION PROGRAMS
ENERGY SOURCES
ENHANCED RECOVERY
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
FEDERAL REGION VIII
FIELD TESTS
FLUID INJECTION
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
INFORMATION
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
LABELLED COMPOUNDS
LIGHT NUCLEI
MINUTES LIVING RADIOISOTOPES
NORTH AMERICA
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
OIL WELLS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
POLYMERS
PRODUCTION
RADIOISOTOPES
RECOVERY
TESTING
TRACER TECHNIQUES
TRITIUM COMPOUNDS
TRITIUM OXIDES
USA
WATER
WATERFLOODING
WELLS
WYOMING
YEARS LIVING RADIOISOTOPES