A variable cell model for simulating gas condensate reservoir performance
A variable cell model for simulating gas condensate reservoir performance has been developed. The model closely approximates predictions of conventional compositional models but would only required a fraction of the computation time. The characteristic trend of oil saturation profiles, which is exhibited when gas condensate wells produce below dew point pressure, was utilized to divide the reservoir into three concentric regions. Each region is simulated by one cell, and the volume of each cell is varied as production continues. Dew point pressure and phase behavior of the reservoir fluid control expansion of the inner first and second cells and contraction of the exterior third cell. The model was used to study the effect of liquid flow on well-stream fluid composition. Also, the influence of production rate and reservoir fluid phase equilibria data on the extent of two phase flow dominated region was investigated. Various sets of relative permeability data were used to evaluate the effect of relative permeability data on productivity decline. Vapor-liquid phase equilibrium calculations incorporating the Redlich-Kwong-Zudkevitch-Joffe equation of state was utilized to study the effect of composition on equilibrium ratios during gas condensate depletion.
- Research Organization:
- University of Southern California, Los Angeles, CA (USA)
- OSTI ID:
- 7080959
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
CHEMICAL COMPOSITION
DEW POINT
ENGINEERING
EQUATIONS
EQUATIONS OF STATE
EQUILIBRIUM
FLUID FLOW
FLUIDS
GAS CONDENSATE WELLS
MATHEMATICAL MODELS
OIL SATURATION
PERFORMANCE
PERMEABILITY
PHASE STUDIES
PRODUCTION
RESERVOIR ENGINEERING
RESERVOIR FLUIDS
RESERVOIR PRESSURE
RESOURCE DEPLETION
SATURATION
SIMULATION
TWO-PHASE FLOW
WELLS