ECLIPSE Local Grid Refinement & Coarsening

Local grid refinement (LGR) allows you to capture rapidly varying fluid fronts in a full field model. ECLIPSE LGR allows for enhanced grid definition, which is useful for modeling wells or hydraulic fractures and other complex reservoir structures. Grid coarsening is the complement of local grid refinement and allows you to amalgamate cells in dynamically less active regions of the reservoir. 

The local models may be 2D radial, 3D radial, or 3D Cartesian. Local models may have more layers than the global model.

ECLIPSE software automatically calculates the transmissibilities between  local models and the global model. The properties of the cells in the local grid can be inherited from the global grid or specified explicitly for the refined cells. You can define local grid rock properties such as porosity, permeability, transmissibility multipliers, and so on.  

Petrel Reservoir Engineering software supports the ECLIPSE local grid refinement and coarsening features, and also provides an option for explicit modeling of hydraulic fractures.