MRST - MATLAB Reservoir Simulation Toolbox

Function computeWaterComp.m
tutorial main page computeComposition.m computeWaterComp.m equationCompositional.m flash_calculation.m getHenryCoef.m
getR.m initStateBravo.m omega_l.m quadraticRelPerm.m runBravo.m setNonlinearSolverParameters.m setupControls.m
setupGeometry.m setupSystem.m solvefi.m vaporPressure.m

Compute the water concentrations

Computes

  • the total water concentration Cw,
  • the gas water concentration cwg and
  • the liquid water concentration cwl

for given

  • pressure p,
  • total concentrations C,
  • liquid concentrations cl,
  • liquid saturation sL.

For more details about the equations used here, we refer to Bravo tutorial note.

function [Cw, cwg, cwl] = computeWaterComp(p, C, cl, sL, system)
   [nComp, vp, R, Temp] = deal(system.nComp, system.vp, system.R, system.Temp);
   cwg = vp/(R*Temp);
   omega_liq = omega_l(p, system);
   if iscell(C)
      cwl = omega_liq{1}.*cl{1};
      for ic = 2 : nComp
         cwl = cwl + omega_liq{ic}.*cl{ic};
      end
      cwl = 1./omega_liq{nComp + 1}.*(1-cwl);
      Cw = cwg.*(1 - sL) + cwl.*sL;
   else
      omega_liq = cell2mat(omega_liq);
      cwl = sum(bsxfun(@times, omega_liq(1:nComp)', cl), 2);
      cwl = 1./omega_liq(nComp + 1).*(1-cwl);
      Cw = cwg.*(1 - sL) + cwl.*sL;
   end
end

Published October 8, 2014