MATHEMATICAL MODELING OF THE WELL-BED SYSTEM UNDER THE GASLIFT OPERATION

Formulation of the mathematical model of a well-bed system is considered in this paper. It is proposed that the formation of gas liquid mixture area, i.e. the area between a lift shoe and bed has to be considered. On the basis of conducted gaslift well field research there was determined the influence of immersion depth on a gas-liquid mixture (GLM) formation and obtained generalized for all type of wells empirical expression for GLM formation process describing the dependence of the latter on an injection rate, lift diameter and immersion depth. Based on gas, GLM and fluid flow equations proposed in [4] a technique for gaslift process forecast was elaborated where the empirical expression is used as a boundary condition at the inlet point of injected gas.