Matching simulator wellblock pressures with observed buildup pressures in two-layer reservoirs
An equation is given for the buildup time at which the wellbore pressure should match the kh average of the simulator wellblock pressures in history-matching procedures of two-layer 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 it can also be used for reservoirs with interlayer crossflow. Also included is a method to handle cases when only a single buildup pressure is recorded. To check the validity of the results, data from a three-dimensional (3D) 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:
- 5373253
- 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
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ANALOG SYSTEMS
ANALYTICAL SOLUTION
COMPRESSIBILITY
COMPUTER CALCULATIONS
COMPUTERIZED SIMULATION
CROSSFLOW SYSTEMS
DIMENSIONS
EQUATIONS
FLOW RATE
FORMATION DAMAGE
FUNCTIONAL MODELS
LAYERS
MECHANICAL PROPERTIES
NATURAL GAS WELLS
OIL WELLS
POROSITY
PRESSURE MEASUREMENT
PRESSURIZING
RESERVOIR PRESSURE
SIMULATION
SIMULATORS
THICKNESS
TIME DEPENDENCE
WELL PRESSURE
WELLS