Simulation of crude distillation process of AVDU A12/2 unit with the help of HYSYS program allow us to specify measured stream data and to receive missing data. Accessible flowsheet was obtained. Thermodynamic HYSYS model use allow us to calculate physical and transfer properties, phase equilibrium of product flows with the big accuracy. This gave capability us to form stream data table which is numerical image of process. This table will be base for existent process integration and for composite curves building, and for unit energy efficiency calculation. HYSYS model allow us to receive a visual image of hot and cold utilities.