Convective-heat transfer model for underground combustion
In the underground combustion process, part of the heat generated at the combustion front is carried downstream by convection. Temperature distribution in the combustion process can be obtained by including a delta function for heat generation at the combustion surface. The ratio R of the heat-front velocity, uDbU, to the combustion front velocity, uDcU, is one of the most important factors governing the temperature distribution in the pay zone. For cases of uDbU < uDcU, no heat is carried ahead of the combustion front and the temperature at the combustion front remains constant for all times. The fraction of the heat stored between the heat front and the combustion front decreases as the time increases. This is because more of the heat is consumed in heating the formation behind the heat front and in heating the cap and base rock. It is advantageous in the combustion process to control the fluid composition and the rate of the injection stream so that uDbU > uDcU. For this case, a portion of the generated heat is carried ahead of the combustion front by convection. The downstream heat efficiency is found to increase as the uDbU/uDcU ratio increases.
- Research Organization:
- Shell Development Co
- OSTI ID:
- 5778495
- Journal Information:
- Soc. Pet. Eng. J.; (United States), Journal Name: Soc. Pet. Eng. J.; (United States) Vol. 8:4; ISSN SPTJA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
AIR
BOUNDARY CONDITIONS
BOUNDARY LAYERS
CHEMICAL REACTIONS
COMBUSTION
DISTRIBUTION
EFFICIENCY
ENERGY SOURCES
ENERGY TRANSFER
ENGINEERING
ENHANCED RECOVERY
FLUID FLOW
FLUIDS
FOSSIL FUELS
FUELS
GASES
HEAT TRANSFER
IN-SITU COMBUSTION
IN-SITU PROCESSING
INJECTION
INTAKE
LAYERS
MATHEMATICAL MODELS
MATHEMATICS
OIL WELLS
OXIDATION
PETROLEUM
PHYSICAL PROPERTIES
PROCESSING
RECOVERY
RESERVOIR ENGINEERING
RESERVOIR TEMPERATURE
TEMPERATURE DISTRIBUTION
THERMAL CONDUCTIVITY
THERMAL RECOVERY
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
VELOCITY
VISCOSITY
VISCOUS FLOW
WELL TEMPERATURE
WELLS