A recently developed method for pseudo-component delumping is tested for delumping the results of compositional reservoir simulation. The procedure, based on the reduction concept, is analytical and consistent and it accurately takes into account non-zero binary interaction parameters in cubic equations of state. The delumping method was implemented in a postprocessor to the commercial Eclipse reservoir simulator and successfully tested on several cases: oil and gas condensate reservoirs for depletion, lean gas re-injection, and carbon dioxide injection. The analytical delumping method based on reduction gives systematically better results than the regression-based delumping method used previously.
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