History matching and predicting GOR behavior with analytical functions
A study initiated in 1982 examined gas production mechanisms in Prudhoe Bay. The results the authors report represent only a part of this effort and deal mainly with developing analytical techniques for GOR prediction. Traditionally, a well's producing GOR is history matched and subsequently predicted by numerical reservoir simulation. We demonstrate how GOR history in gas underunning and coning wells may be described by rate-time-, and cumulative-offtake-dependent analytical functions. The coefficients in the equations are determined by a nonlinear parametric least-squares regression approach. For each well, after an empirical GOR match is achieved, the analytical functions are used for short-term GOR forecasting as an integral part of a comprehensive production availability forecast (PAF) computer model. The authors conclude that the parametric studies have produced viable analytical models for the matching and predicting of GOR in wells that have a history of high GOR.
- Research Organization:
- Sohio Petroleum Co.
- OSTI ID:
- 5558636
- Journal Information:
- SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States), Journal Name: SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States) Vol. 1:3; ISSN SREEE
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
030300* -- Natural Gas-- Drilling
Production
& Processing
ARCTIC OCEAN
BAYS
BEAUFORT SEA
COMPUTERIZED SIMULATION
EQUATIONS
FORECASTING
GAS YIELDS
GEOLOGIC DEPOSITS
LEAST SQUARE FIT
MATHEMATICAL MODELS
MAXIMUM-LIKELIHOOD FIT
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NATURAL GAS WELLS
NONLINEAR PROBLEMS
NUMERICAL SOLUTION
PRODUCTION
PRUDHOE BAY
RESOURCES
SEAS
SIMULATION
SURFACE WATERS
TIME DEPENDENCE
WELLS
YIELDS