Carbon dioxide injection into undersaturated viscous oil reservoirs--simulation and field application

Conference · Thu Jan 01 04:00:00 EST 1976 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:6512419

Stright, Jr, D H; Aziz, K; Settari, A; Starratt, F E

This work provides an analysis of the potential for using CO/sub 2/ to increase oil recovery from viscous undersaturated oil reservoirs where the oil zone is underlain by water. The principal role of CO/sub 2/ in this immiscible application is to reduce oil viscosity in order to increase the ultimate oil recovery by reducing water coning. The use of CO/sub 2/ or rich gas for viscosity reduction in heavy undersaturated oil reservoirs has been proposed previously; however, this process has not been recommended for bottom water reservoirs. The results of a single well field pilot test are presented. In this test, a slug of CO/sub 2/ was injected at the oil-water contact. Following a soak period, the well was back-produced to measure the change in water-oil ratio. The CO/sub 2/ treatment temporarily reduced the water-oil ratio; however, during back production the water-oil ratio increased to above the stabilized pretest value. Several explanations for this behavior are proposed. A numerical single well model in the r-z coordinates with implicit handling of saturation pressure was developed. (31 refs.)

• Research Organization: Calgary Univ
• OSTI ID: 6512419
• Report Number(s): CONF-761008-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE-6116
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
58 GEOSCIENCES
580100 -- Geology & Hydrology-- (-1989)
CARBON DIOXIDE INJECTION
ENERGY SOURCES
ENHANCED RECOVERY
FIELD TESTS
FLUID INJECTION
FOSSIL FUELS
FUELS
MISCIBLE-PHASE DISPLACEMENT
OIL SATURATION
OIL WELLS
PETROLEUM
RECOVERY
RESERVOIR ROCK
SATURATION
SIMULATION
STIMULATION
TESTING
WELL STIMULATION
WELLS