NAME

       upscale_elasticity - Upscale elastic parameters

SYNOPSIS

       upscale_elasticity [grid file] [option=value]

DESCRIPTION

       Utility that generalizes Backus upscaling to general geometry. Elastic moduli specified on
       a cell-basis on corner-point grids can be upscaled to an elasticity tensor  with  possibly
       21  independent  components.  The  code  simulates the 6 load conditions (three normal and
       three shear forces  applied  to  the  geometry)  necessary  for  determining  the  elastic
       properties.

       Example usage:

       upscale_elasticity           gridfilename=filename.grdecl           rock_list=rocklist.txt
       output=outfilename.txt

OPTIONS

       gridfilename Filename for grid file.
       vtufilename Save results to vtu file for visual inspection. If not specified, vtu  results
       are not saved.
       rock_list A file with a list of one file per satnum specifying elastic properties for each
       rock type.
       output Filename for which results are written in ASCII format. If not specified, output is
       not written to file.
       method  The  kind  of  boundary  couplings  to  use, can be 'mpc' or 'mortar'. Defaults to
       'mortar' (best for non-perfect periodic grids).
       Emin Minimum E (youngs) modulus. Used to avid numerical issues if contrasts in grid is too
       large. Defaults to 0.
       ctol Collapse tolerance in grid parsing. Defaults to 1e-6.
       ltol Tolerance in iterative linear solvers. Defaults to 1e-8.
       linsolver_type  Type  of  solver  for  linear  system.  Possibilities  are 'iterative' and
       'direct' (LU factorization). Default is 'iterative'.

REPORTING BUGS

       Report on github repository <https://github.com/OPM/opm-upscaling/issues>