Modelagem dinâmica e simulação computacional de poços de petróleo verticais e direcionais com elevação por bombeio mecânico

Abstract

This paper presents a dynamic model of vertical oil wells using artificial elevation by suckerrod pumping. The modeling of the system is separated by modules that provide a good understanding of the system. The modules are: a) induction motor, using a stationary model that describes the behavior of movement transmitted to the pumping unit in function of load received b) pumping unit, responsible for describing the transformation of the rotational movement to alternative movement by the kinematic model, c) rod string, using a model with concentrated parameters to describe the propagation of movement along of the rod string d) fluid, used to describe the motion of fluid in the column of production according to the movement of the rod string d) subsurface pump, which describes the behavior of the variation of pressure inside the pump according to the movement of the piston, the actuation of traveling and standing valves and the production of fluid to the surface, f) annular, used to describe the behavior of fluid flow in the revetment; g) reservoir, describing the production of fluid from the reservoir to the well with the linear model and the Vogel IPR curve (inflow performance relationship). The main advantage of this modeling is the use of, whenever possible, instead of concentrated parameters distributed parameters, which allows the use of ordinary differential equations instead of partial differential equations, the simulation is much more complex