Changes

[[file:fundamentals-of-fluid-flow_fig2.png|thumb|300px|{{figure number|2}}Plots of multi-rate production data.]]

[[file:fundamentals-of-fluid-flow_fig2.png|thumb|300px|{{figure number|2}}Plots of multi-rate production data.]]

Several IPR formulas have been developed to represent the inflow behavior of various types of wells. Matching a formula to multi-rate production data ([[:file:fundamentals-of-fluid-flow_fig2.png|Figure 2]]) allows determination of the value of the characteristic constants in the equations, which in turn characterize the productivity of the well. The empirical formulas are the primary tools to quantify well productivity and to perform production calculations.

Several IPR formulas have been developed to represent the inflow behavior of various [[types of wells]]. Matching a formula to multi-rate production data ([[:file:fundamentals-of-fluid-flow_fig2.png|Figure 2]]) allows determination of the value of the characteristic constants in the equations, which in turn characterize the productivity of the well. The empirical formulas are the primary tools to quantify well productivity and to perform production calculations.

===Productivity index equation for undersaturated oil===

===Productivity index equation for undersaturated oil===