For wells producing below bubblepoint pressure, ''p''<sub>b</sub> while the reservoir pressure is above the bubblepoint (''p''<sub>wf</sub> <italic><sub>b</sub>p
+
For wells producing below bubblepoint pressure, ''p''<sub>b</sub> while the reservoir pressure is above the bubblepoint (''p''<sub>wf</sub>''<sub>b</sub>p''
−
</italic><sub>R</sub>), the IPR assumes the shape shown in Figure 2(d). It can be represented by the following equations:
+
<sub>R</sub>), the IPR assumes the shape shown in Figure 2(d). It can be represented by the following equations: