Method for Evaluating the Efficiency of Oil, Gas and Reservoir Water Separation Modes

Abstract

The problem of oil degassing when preparing it for transportation through trunk pipelines is the most important. The process of degassing (separation) of extracted oil in the fields takes place in oil treatment plants (UPN). The existing literature devoted to the problem of degassing is very extensive, but its analysis has shown that the main attention is paid to the search for optimal modes of operation of individual UPN devices (heating furnaces, demulsifiers, separators of the 1st stage, separators of the 2nd stage, etc.). Thus, the question of finding the optimal mode for the separation process remains unresolved. The purpose of this study is to develop a mathematical model of a three-stage separation process in the UPN and a method for evaluating the effectiveness of separation modes of oil, gas and reservoir water. To compile a mathematical model of the separation process, the material balance equations for the liquid and gas phases of oil are used. The heat balance equation is excluded from the mathematical model, since the separation process proceeds at a constant temperature. The results obtained in the article allow choosing the optimal operating mode for the oil treatment plant in real time according to the controlled parameters of the technological process, which in practice will lead to a reduction in the volume of substandard oil and reduce the cost of its re-separation.