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Numerical simulation of oil recovery performance in complex naturally fractured reservoirs

Book ·
OSTI ID:7172231
A multi-porosity and multi-permeability (MPMP) naturally fractured reservoir simulator has been developed and applied to perform systematic parametric studies which provide a better understanding of the complex interplay of recovery mechanisms in naturally fractured reservoirs. In addition to the normal features of dual-porosity models, the MPMP simulator allows matrix-matrix flow, matrix sub-gridding, compressibility effects on fracture permeability, five- or nine-point grid connection, a wide variation in the distribution of rock properties and a computer source code which is easily altered for specific research applications. The parametric studies deal with a real water-oil and cross-sectional gas-oil systems and a wide range of rock and fracture properties. Of particular interest are the low permeability and high capillary pressure matrix blocks and non-uniform distribution of the rock properties. For the water-oil system, correlation between the recovery performance, reservoir properties and flow rates has been found. A new method of estimating reserves, determining composite reservoir properties and predicting future recovery performance form the recovery history is presented. For the gas-oil system, the recovery performance depends in a complex manner on the rock and fracture properties, and rates of fluid flow. However, it has been determined that critical ranges of matrix permeability and capillary pressure, and gas injection and oil production rates exist, below which the recovery performance shows little sensitivity, but above which there is a sharp increase in the sensitivity to these parameters.
Research Organization:
University of Southern California, Los Angeles, CA (USA)
OSTI ID:
7172231
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ANALOG SYSTEMS
ASSOCIATED GAS
CAPILLARY FLOW
COMPRESSIBILITY
COMPUTER CODES
CORRELATIONS
ENERGY SOURCES
ENHANCED RECOVERY
FLOW RATE
FLUID FLOW
FLUID INJECTION
FLUIDS
FORECASTING
FOSSIL FUELS
FRACTURE PROPERTIES
FRACTURED RESERVOIRS
FUELS
FUNCTIONAL MODELS
GAS INJECTION
GASES
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
HYDROGEN COMPOUNDS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MECHANICS
OIL WELLS
OXYGEN COMPOUNDS
PERFORMANCE
PERMEABILITY
PETROLEUM
POROSITY
RECOVERY
RESERVOIR PRESSURE
ROCK MECHANICS
SIMULATORS
WATER
WELLS