Effects of mobile water on multiple-contact miscible gas displacements

Journal Article · Wed Jun 01 04:00:00 EDT 1983 · SPEJ, Soc. Pet. Eng. J.; (United States)

DOI:https://doi.org/10.2118/10687-PA· OSTI ID:5522735

Tiffin, D L; Yelling, W F

This paper discusses the effects of mobile water on multiple-contact miscible displacements under water- and oil-wet conditions. Tests were conducted in 8-ft (244-cm) water- and oil-wet Berea cores in which CO/sub 2/ and water were injected both separately and simultaneously to displace a reservoir oil. The data presented focus on effects of water in the oil-moving zone (OMZ) where the CO/sub 2/ is generating miscibility with the oil and mobilizing residual oil to waterflooding. Special emphasis is placed on understanding the effect of mobile water saturation on the oil-displacement efficiency and the component transfer between phases necessary to develop miscibility in the CO/sub 2//reservoir-oil system. This study demonstrates that reservoir wettability is a key factor in the performance of AGWIP. Gas/water injection can, under certain conditions, have adverse effects on characteristics of the OMZ. These effects are in part caused by the water trapping portions of the oil and solvent. It was observed that mobile water did not change the mass transfer process by which miscibility develops in a multiple-contact miscible displacement.

• Research Organization: Amoco Production Co.
• OSTI ID: 5522735
• Journal Information: SPEJ, Soc. Pet. Eng. J.; (United States), Journal Name: SPEJ, Soc. Pet. Eng. J.; (United States) Vol. 23:3; ISSN SSPJD
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
BENCH-SCALE EXPERIMENTS
CARBON DIOXIDE INJECTION
DATA
ENHANCED RECOVERY
EXPERIMENTAL DATA
FIELD TESTS
FLUID INJECTION
INFORMATION
MISCIBLE-PHASE DISPLACEMENT
NUMERICAL DATA
OIL SATURATION
OIL WELLS
RECOVERY
RESERVOIR ROCK
SATURATION
TESTING
WATER INFLUX
WATER SATURATION
WATERFLOODING
WELLS
WETTABILITY