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Depletion performance of volumetric high-pressured gas reservoirs

Conference ·
OSTI ID:7158932
;
A method to predict the percent recovery of volumetric, high-pressured gas reservoirs from the initial pressure to the abandonment pressure, using only initial reservoir data is presented. This method can also be used with early-life production data to predict the initial gas in place. The method developed in this study is based on an incremental solution to the general material balance equation with fewer assumptions than any available technique. All parameters in the material balance are pressure dependent and are recalculated for every 100 psi drop in reservoir pressure. To calculate these parameters, procedures were developed using correlations and data available in the literature. Pore volume compressibilities, formation water compressibilities, and gas compressibility factors were determined for temperature and pressure extremes of 400/sup 0/F and 20,000 psia, respectively. The pressure dependency of the pore volume compressibility and the formation water compressibility are unique features of this model. The reservoir depletion model presented here is applied to a field example, as are three published techniques for determining reserves in abnormally-pressured reservoirs. The depletion model yielded the most accurate prediction of the initial gas in place for this field example.
Research Organization:
Exxon Co. U.S.A.
OSTI ID:
7158932
Report Number(s):
CONF-861080-
Country of Publication:
United States
Language:
English

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Related Subjects

03 NATURAL GAS
030300* -- Natural Gas-- Drilling
Production
& Processing
CHEMICAL ANALYSIS
COMPRESSIBILITY
CORRELATIONS
CRYSTAL STRUCTURE
ENERGY SOURCES
FLOW RATE
FLUIDS
FORECASTING
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
GEOLOGIC MODELS
GEOPRESSURE ANOMALIES
GROUND WATER
HIGH TEMPERATURE
HYDROGEN COMPOUNDS
INTERSTITIAL WATER
MECHANICAL PROPERTIES
MICROSTRUCTURE
NATURAL GAS
NATURAL GAS WELLS
OXYGEN COMPOUNDS
PERFORMANCE
POROSITY
PRODUCTION
QUANTITATIVE CHEMICAL ANALYSIS
RESERVES
RESERVOIR FLUIDS
RESERVOIR PRESSURE
RESERVOIR ROCK
RESERVOIR TEMPERATURE
RESOURCE DEPLETION
RESOURCES
VERY HIGH PRESSURE
VOLUMETRIC ANALYSIS
WATER
WELLS