PRESSURE FIELD IN VERTICAL GAS FLOW IN A WELL

An expression for the pressure filed of a gas flowing in a vertical well is derived. It is assumed that the ascending flow regime changes from laminar to turbulent one at a certain depth due to increasing flow velocity at the expense of decreasing density. Results of solving the stationary nonlinear problem on the gas pressure distribution along the active well bore are presented. The flow is considered to be subsonic. The solution is expressed in the form of an implicit pressure dependence on the vertical coordinate. A program has been developed and calculations have been performed of the dependence of the pressure gradient on the gas velocity and the pressure field versus the coordinate along the well bore.