Practical control of timestep selection in thermal simulation
Journal Article
·
· SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States)
The authors present a new technique for estimating accumulating time truncation error in thermal reservoir simulation. The calculation uses only current reservoir information, thereby avoiding difficulties encountered by some past formulations, and is integrated easily into fully implicit reservoir simulators. They describe an error-controlled timestep selector based on this estimate as well as provisions for limiting the calculated timestep based on the imminent appearance or disappearance of a gas phase. They also provide a new technique for estimating the solution of certain Newtonian iterations. The algorithm is capable of calculating timesteps at the beginning of a simulation and when major well rate changes are specified. The resulting timestep selector enhances simulator accuracy without increasing computational work and affords greater reliability through the reduction of failed timesteps.
- Research Organization:
- Computer Modelling Group
- OSTI ID:
- 5417921
- Journal Information:
- SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States), Journal Name: SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States) Vol. 1:2; ISSN SREEE
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ACCURACY
ALGORITHMS
ANALOG SYSTEMS
COMPUTERIZED SIMULATION
ENERGY SOURCES
ENHANCED RECOVERY
ERRORS
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
ITERATIVE METHODS
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
OIL WELLS
PETROLEUM
RECOMMENDATIONS
RECOVERY
RELIABILITY
SIMULATION
SIMULATORS
STIMULATION
THERMAL RECOVERY
TIME DEPENDENCE
WELL STIMULATION
WELLS
020300* -- Petroleum-- Drilling & Production
ACCURACY
ALGORITHMS
ANALOG SYSTEMS
COMPUTERIZED SIMULATION
ENERGY SOURCES
ENHANCED RECOVERY
ERRORS
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
ITERATIVE METHODS
MATHEMATICAL LOGIC
MATHEMATICAL MODELS
OIL WELLS
PETROLEUM
RECOMMENDATIONS
RECOVERY
RELIABILITY
SIMULATION
SIMULATORS
STIMULATION
THERMAL RECOVERY
TIME DEPENDENCE
WELL STIMULATION
WELLS