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Reservoir simulation with history-dependent saturation functions

Conference · · Soc. Pet. Eng. AIME, Pap.; (United States)
OSTI ID:6682361

A history-dependent model for saturation functions, in combination with a 3-dimensional, 3-phase, semi-implicit reservoir simulator, which allows more realistic treatment of reservoir simulations in which the direction of saturation change reverses, has been developed. In water coning simulations with variable rates, for waterflooding in the presence of free gas saturations, and for gas cap shrinkage, use of hysteresis in saturation functions shows significant differences from results obtained by conventional methods. The model is based upon remembering to some extent the saturation history of the reservoir. In doing this, smooth transitions of both relative permeabilities and capillary pressures from drainage-to-imbibition or imbibition-to-drainage states are allowed. In addition, the effect of trapped gas and/or oil saturations on relative permeabilities and capillary pressures is taken into account. (17 refs.)

Research Organization:
Exxon Prod Res Co
OSTI ID:
6682361
Report Number(s):
CONF-7410175-
Journal Information:
Soc. Pet. Eng. AIME, Pap.; (United States), Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Vol. SPE-5106; ISSN SEAPA
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
CHANNELING
CONNATE WATER
ENHANCED RECOVERY
FLUID INJECTION
FLUIDS
GEOLOGIC FORMATIONS
GROUND WATER
HYDROGEN COMPOUNDS
INTERSTITIAL WATER
MATHEMATICAL MODELS
OIL WELLS
OXYGEN COMPOUNDS
PERMEABILITY
RECOVERY
RESERVOIR FLUIDS
RESERVOIR PRESSURE
RESERVOIR ROCK
SATURATION
SIMULATION
WATER
WATERFLOODING
WELLS