ADJUSTMENT OF A CUBIC EQUATION OF STATE (EOS) BY THE METHOD OF MULTIPLE NONLINEAR REGRESSION (MNR) TO SIMULATE THE VOLUMETRIC BEHAVIOR AND PHASES OF THE CRUDE OIL PRODUCED IN THE COLORADO SCHOOL FIELD

In this work was applied a used methodology by the hydrocarbons industry to control the quality and representativeness of the available PVT test in the Colorado School Field during its productive life. The more appropriate EOS for the fluid's modeling was chosen by mean of exhaustive bibliographic review; which permits to collect information about of important characteristics of the models for their qualification. Finally the tuning of the chosen EOS was realized, modifying systematicaly its internal parameters by mean of multiple nonlinear regressions (MNR), which allows that the model predicts very well the phase equilibrium and the volumetric behavior of the reservoir fluid.