In the Inflow Performance Relationship, what does PI stand for?

In the Inflow Performance Relationship, what does PI stand for?

• A. Productivity Index (PI)
• B. Pressure Index (PI)
• C. Porosity Index (PI)
• D. Permeability Index (PI)

Answer: (A)

Productivity Index is the factor that links production rate to the pressure drop between the reservoir and the well in the Inflow Performance Relationship. In the usual form, q = J × (p_res - p_wf), with q as the production rate, p_res as the reservoir pressure at the influx, p_wf as the bottom-hole flowing pressure, and J (the Productivity Index) capturing how easily fluids can flow into the well. J depends on rock properties, fluid properties, and well conditions; a higher PI means you can produce more for the same pressure drop. The other terms—pressure, porosity, or permeability indices—aren’t used here to describe this inflow behavior, whereas Productivity Index specifically expresses the connection between flow rate and pressure drawdown.

Productivity Index is the factor that links production rate to the pressure drop between the reservoir and the well in the Inflow Performance Relationship. In the usual form, q = J × (p_res - p_wf), with q as the production rate, p_res as the reservoir pressure at the influx, p_wf as the bottom-hole flowing pressure, and J (the Productivity Index) capturing how easily fluids can flow into the well. J depends on rock properties, fluid properties, and well conditions; a higher PI means you can produce more for the same pressure drop. The other terms—pressure, porosity, or permeability indices—aren’t used here to describe this inflow behavior, whereas Productivity Index specifically expresses the connection between flow rate and pressure drawdown.