Miscible displacement of crude oil by CO/sub 2//SO/sub 2/ mixtures

Journal Article · Fri May 01 04:00:00 EDT 1987 · SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States)

OSTI ID:6469581

Sayegh, S G; Krause, F F; Fosti, J E

Slim-tube displacement tests on a Pembina Cardium stock-tank oil using CO/sub 2/, SO/sub 2/, and four CO/sub 2//SO/sub 2/ mixtures as the flooding agents demonstrated that the mixtures have lower minimum miscibility pressures (MMP's) than both pure components. More oil was recovered from Berea sandstone cores when CO/sub 2/ and a CO/sub 2//SO/sub 2/ mixture were the flooding agents than when SO/sub 2/ was used. Carbon dioxide and the CO/sub 2//SO/sub 2/ mixture recovered comparable quantities of oil from Indiana limestone, while a severe loss of permeability was observed in the corresponding SO/sub 2/ flood. Rock/fluid interactions characterized by mineral dissolution and precipitation were observed with all flooding agents in both rock types. New mineral phases formed abundantly in CO/sub 2//SO/sub 2/ and SO/sub 2/corefloods of Indiana limestone and account for the severe loss of permeability noted in the latter corefloods.

• Research Organization: Petroleum Recovery Institute
• OSTI ID: 6469581
• Journal Information: SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States), Journal Name: SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States) Vol. 2:2; ISSN SREEE
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
BENCH-SCALE EXPERIMENTS
CARBON DIOXIDE INJECTION
CARBONATE ROCKS
CHALCOGENIDES
DISPERSIONS
DISSOLUTION
DRILL CORES
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FOSSIL FUELS
FUELS
LIMESTONE
MISCIBLE-PHASE DISPLACEMENT
MIXTURES
OIL WELLS
OIL YIELDS
OXIDES
OXYGEN COMPOUNDS
PERMEABILITY
PETROLEUM
PRECIPITATION
PRESSURE DEPENDENCE
RECOVERY
ROCK-FLUID INTERACTIONS
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
SEPARATION PROCESSES
SOLUBILITY
STIMULATION
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SWEEP EFFICIENCY
WELL STIMULATION
WELLS
YIELDS