Based on cubic spline interpolation algorithm,the true boiling point temperature(TBP)distribution data of an oilfield in the South China Sea are analyzed.In comparison with the actual distillation curve and HYSYS model,it is found that cubic spline interpolation can achieve good reproduction of the distillation curve.The physical properties of the virtual components cut by cubic spline interpolation algorithm are calculated.The results show that the overall density and specific heat capacity of the cutting components are not significantly different from the actual values,but the molecular weight error is relatively large.The phase diagram calculation of the cut virtual components shows that when the pressure is lower than the critical pressure,the bubble and dew point calculation results are basically consistent with the HYSYS model except for the dew point data of the north oilfield.
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