Implementation of an improved adaptive-implicit method in a thermal compositional simulator
Journal Article
·
· SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States)
- D and S Petroleum Consulting Group Ltd., Calgary (CA)
A multicomponent thermal simulator with an adaptive-implicit-method (AIM) formulation/inexact-adaptive-Newton (IAN) method is presented. The final coefficient matrix retains the original banded structure so that conventional iterative methods can be used. Various methods for selection of the eliminated unknowns are tested. AIM/IAN method has a lower work count per Newtonian iteration than fully implicit methods, but a wrong choice of unknowns will result in excessive Newtonian iterations. For the problems tested, the residual-error method described in the paper for selecting implicit unknowns, together with the IAN method, had an improvement of up to 28% of the CPU time over the fully implicit method.
- OSTI ID:
- 6633013
- Journal Information:
- SPE (Society of Petroleum Engineers) Reserv. Eng.; (United States), Vol. 3:4
- Country of Publication:
- United States
- Language:
- English
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02 PETROLEUM
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
NEWTON METHOD
PETROLEUM
THERMAL RECOVERY
SIMULATORS
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ANALOG SYSTEMS
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990230 - Mathematics & Mathematical Models- (1987-1989)
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
NEWTON METHOD
PETROLEUM
THERMAL RECOVERY
SIMULATORS
NUMERICAL SOLUTION
ANALOG SYSTEMS
ENERGY SOURCES
ENHANCED RECOVERY
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
ITERATIVE METHODS
RECOVERY
020300* - Petroleum- Drilling & Production
020200 - Petroleum- Reserves
Geology
& Exploration
990230 - Mathematics & Mathematical Models- (1987-1989)