Analytical and numerical modeling of immiscible gravity-stable gas injection into stratified reservoirs

Conference · Sat Jan 01 04:00:00 EST 1983 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:5877051

Ypma, J G.J.

An analytic model is presented for gas/oil gravity drainage in a homogeneous, dipping reservoir. The model provides expressions for the oil-saturation distribution in the gas-invaded zone, and for the thickness of the layer of oil accumulated at the bottom of the dipping reservoir. The model has been validated with numeric simulations. The sensitivity of gas/oil gravity drainage to key variables such as injection rate, oil relative permeability, and permeability anisotropy, can be determined quickly with this model. Example calculations show that miscible-like recovery efficiencies are possible with immiscible gas injection into high-permeability dipping reservoirs with light oil. A procedure has been developed, based on the analytic model, to accurately simulate immiscible gas injection into highly stratified reservoirs. This simulation procedure allows a great deal of geologic detail to be incorporated into reservoir models, because it permits relatively coarse grids.

• OSTI ID: 5877051
• Report Number(s): CONF-8310121-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE-12158
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FOSSIL FUELS
FUELS
GAS INJECTION
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
MATHEMATICAL MODELS
MINERAL RESOURCES
OIL FIELDS
PERMEABILITY
PETROLEUM
PETROLEUM DEPOSITS
RECOVERY
RESERVOIR ROCK
RESOURCES