The development and testing of a multi-level, static and dynamic local grid refinement technique

Miscellaneous · Sun Jan 01 00:00:00 EST 1989

OSTI ID:6681623

Biterge, M B

Local grid refinement procedures for multi-dimensional, multi-phase reservoir problems are developed and tested via isothermal reservoir simulations. First, a complete solution is obtained using a coarse grid. This solution determines the preliminary primary variable distribution in the entire domain, and provides input for localized high curvature, high gradient fine grid regions. Second, Dirichlet type boundary conditions are assigned to the fine grid at the coarse-fine node interfaces. Flow equations are then resolved only within the boundaries of the fine grid. This methodology allows multi-level grid refinement by embedding second, third, etc., level grids within previously established fine grid(s). For enhanced oil recovery techniques (e.g. waterflooding), locations of high gradient regions are not known initially. Therefore, a predetermined distribution of fine grids within the fundamental grid model may be either inadequate or computationally wasteful. A method which continually adjusts the distribution of fine nodal points in response to the nature of the computed solution is needed for better results. Problems of this nature require dynamic grid refinement strategy. The proposed grid refinement techniques offer the following aspects. (1) Implementation of a special technique through which information is transferred from a coarse grid to an embedded fine grid. (2) Automatic determination of localized high gradient regions and spontaneous implementation of finer grid points into these regions. (3) A fast, stable, and general solution scheme. (4) High level of accuracy in computed solutions. (5) Easy adaptation to existing numerical models.

• Research Organization: Pennsylvania State Univ., University Park, PA (USA)
• OSTI ID: 6681623
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
ENHANCED RECOVERY
RESERVOIR ENGINEERING
CALCULATION METHODS
BOUNDARY CONDITIONS
DISTRIBUTION
EQUATIONS
FLOW MODELS
FLUID FLOW
MULTIPHASE FLOW
NUMERICAL SOLUTION
OIL FIELDS
PETROLEUM
SIMULATION
TESTING
WATERFLOODING
ENERGY SOURCES
ENGINEERING
FLUID INJECTION
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
MATHEMATICAL MODELS
MINERAL RESOURCES
PETROLEUM DEPOSITS
RECOVERY
RESOURCES
020300* - Petroleum- Drilling & Production