Unsteady-State Gas Flow-Use of Drawdown Data in the Prediction of Gas Well Behavior

CIM Bulletin, 1963

The solutions to unsteady-state gas flow in a radial system have been reviewed in order to aid in the interpretation of drawdown data. It has been the practice to evaluate the time and rate conversion constants, directly or indirectly, by using reservoir data. This paper presents a method of determining these constants from drawdown data. A simplified approach to the determination for the various boundary conditions is presented. An example of a problem which illustrates the use of this theory appears in the appendix.
Keywords: boundary conditions, centipoise, continuity equation, reservoir, viscosity, Data, flow, Permeability, Pressure, Production rates, Sand, Slopes, Stabilization, Systems, Value