Matching simulator well-block pressures with observed buildup pressures in two-layered reservoirs
An equation is given for the buildup time at which the wellbore pressure should match the kh-average of the simulator well-block pressure in history matching procedures of two-layered reservoirs. The equation takes into account contrasts in flow capacities, porosity-compressibility-thickness products and skin factors, and makes use of fractional flow rates given by the simulator. The equation is derived for reservoirs without crossflow, but can also be used for reservoirs with interlayer crossflow. A method is also included to handle cases where only a single buildup pressure is recorded. To check the validity of the results, data from a three-dimensional reservoir simulator were compared with buildup data from an analytical solution for systems without crossflow, and with data from a radial reservoir simulator for systems with crossflow.
- Research Organization:
- Rogaland Research Inst.
- OSTI ID:
- 5364218
- Report Number(s):
- CONF-8310121-
- Journal Information:
- Soc. Pet. Eng. AIME, Pap.; (United States), Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Vol. SPE12155; ISSN SEAPA
- Country of Publication:
- United States
- Language:
- English
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ANALYTICAL SOLUTION
COMPUTERIZED SIMULATION
DATA ANALYSIS
DIMENSIONS
EQUATIONS
EQUATIONS OF STATE
FLOW RATE
FLUID FLOW
FLUID MECHANICS
FLUIDS
HYDRODYNAMICS
MECHANICS
POROSITY
PRESSURE GRADIENTS
RESERVOIR FLUIDS
RESERVOIR PRESSURE
RESERVOIR ROCK
ROCK-FLUID INTERACTIONS
SENSITIVITY ANALYSIS
SIMULATION
STRATIFICATION
THICKNESS
THREE-DIMENSIONAL CALCULATIONS
WELL LOGGING
WELL PRESSURE
WELLS