Multiphase pressure buildup analysis: A history matching approach
During this study, multiphase and single phase pressure buildup tests were analyzed from Yowlumne oil field in Bakersfield, California, after developing a three-phase, two-dimensional variable bubble point reservoir simulator. The analysis method was to history match the observed buildup performance of the field test using the numerical simulator. A successful match indicates a consistent reservoir description as suggested by the geologists and the engineers, and proper interpretation of pressure buildup tests under multiphase flow conditions. The research also presents some guidelines on how to conduct such a study including data requirements, benefits and recommendations. Unusual pressure buildup behavior were identified due to changes in fluid properties within a wells drainage area during the shut-in period. Such behavior can be misinterpreted as a reservoir heterogeneity, displaying similar characteristics. Possible explanations of unusual buildup behavior are given in heterogeneous cases with partial penetration and permeability anisotropy. Analysis of multiphase tests via the history matching approach provides the absolute permeability and a reliable evaluation of damage or stimulation around the wellbore, which can not be estimated with classical techniques. The approach requires a well kept data bank which covers reservoir rock and fluid properties, well completion, injection/production and pressure transient test reports. An integral part of the study is geological description of the reservoir and well log analysis, which provide net pay thickness, saturation and porosity values for the simulation data set.
- Research Organization:
- Texas A and M Univ., College Station, TX (USA)
- OSTI ID:
- 6761685
- Country of Publication:
- United States
- Language:
- English
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020300* -- Petroleum-- Drilling & Production
ANALOG SYSTEMS
CALIFORNIA
DATA ANALYSIS
DETECTION
DIMENSIONS
ENGINEERING
FEDERAL REGION IX
FLOW MODELS
FLUID FLOW
FLUID INJECTION
FLUIDS
FORMATION DAMAGE
FUNCTIONAL MODELS
HISTORICAL ASPECTS
MATHEMATICAL MODELS
MECHANICS
MULTIPHASE FLOW
NORTH AMERICA
OIL SATURATION
OIL WELLS
PERMEABILITY
POROSITY
PRESSURE MEASUREMENT
PRESSURIZING
PRODUCTION
RESERVOIR ENGINEERING
RESERVOIR FLUIDS
RESERVOIR ROCK
ROCK MECHANICS
SATURATION
SIMULATORS
STIMULATION
TESTING
THICKNESS
TRANSIENTS
TWO-DIMENSIONAL CALCULATIONS
USA
WELL COMPLETION
WELL LOGGING
WELL STIMULATION
WELLS