QUASISTATIONARY MODEL OF PRESSURE RECOVERY IN A GAS WELL

Using the solutions of the nonstationary differential Darcy's equation for an infinite gas bed with the goal of constructing a pressure recovery curve (PRC) for a gas well includes some simplifying assumptions; it is difficult to estimate the error from introducing these assumptions. It is proposed to calculate the PRC using the quasi-stationary model of gas motion through soil. The model is based on integral Darcy’s equation and is well -known as a continuous sequence of stationary states. Basic assumptions, equations and boundary conditions are formulated. The model proposed makes it possible to calculate the PRC for finite as well as finite horizontal sizes of the gas bed. An example of the calculation confirms the validity of the model compared to natural conditions.