A NEW PREDICTIVE THERMODYNAMIC MODEL OF PARAFFIN FORMATION WITH THE CALCULATION OF THE MATHEMATICAL ORIGIN OF THE POYNTING CORRECTION FACTOR

. One of the major and big problems of the oil industry is the deposition and crystallization of paraffin. This process can appear at any point in the design of the production process. Wax precipitation is a thermodynamically controlled process that leads to an increase in the viscosity of the oil mixture, a decrease in the internal diameter of wells and pipelines. Wax appearance temperature (WAT) is one of the important characteristics of the wax deposition process. To manage this procedure, it is required to mathematically accurately forecast the temperature at which the wax possibly could appear, to analyze the phase equilibrium of the system. This article discusses the development of a thermodynamic theoretical model for calculating the paraffin precipitation, using a mathematical approach and experimental data. To consider the issue of phase equilibrium, the fugacity parameter of the pure component is analyzed.