SPE Comparative Solution Project




Q  In the model 1 (the crosssectional problem) how many pore volumes of injection do you want reported and on what frequency?  
A  We'd like the problem run to 7560 days, which is almost 3pv, and a reporting time of every 180 days.  
Q  Is the depth of 12,000 ft in model 2 the top or the bottom of the formation or somewhere in between?  
A  12,000 ft is the depth to the top of model 2.  faqindex 

Q  The second model does not have a block centred grid. This will be a problem with some reservoir simulators. Having the producers on the corners is not a problem, but having the injector directly in the centre of the model is with the grid you propose. 

A  This depends on whether you upscale to an even or an odd numbered coarse grid. There's just no way round this with upscaling on regular grids. Options to consider are: tensor product grids, where you have variable dz, dy on the coarse grid, and local grid refinement.  
Q  What is the filling convention for the datasets in model 2?  
A  The filling convention is top to bottom.  
Q  What well radius should I use in model 2?  
A  The well radius is 5 inches.  
Q  What is the rock compressibility for model 1?  
A  We used 6.0e5/bar, or 4.138e6/psi.  
Update  There is an error in the fine grid porosity and permeability file for model 2. The y, z permeabilities for k = 35, 70 duplicate those for k = 1, 35.
Please download the corrected file. 
09/05/00