4.4.2: Transient Performance of Oil Wells

In our earlier discussions, we assumed that the well had produced for sufficient time to allow the pressures and production rates to stabilize. Transient Flow (time-dependent flow) describes the full time-dependence of these pressures and rates. If we were to produce a well at a constant rate, $q$, then the flowing well pressure, $p_{wf}$, would behave as illustrated in Figure 4.06 on the following page.