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→Effect of depletion on IPR formulas
==Effect of depletion on IPR formulas==
==Effect of depletion on IPR formulas==
[[file:fundamentals-of-fluid-flow_fig6.png|thumb|{{figure number|6}}Depletion deterioration of IPR.]]
[[file:fundamentals-of-fluid-flow_fig6.png|thumb|300px|{{figure number|6}}Depletion deterioration of IPR.]]
Depletion usually results in deterioration of the IPR ([[:file:fundamentals-of-fluid-flow_fig6.png|Figure 6]]). These changes can be predicted quantitatively by calculating the changes of the characteristic constants: ''j'', ''c'', ''q''<sub>ax</sub> ''A'', and ''B''. The exponent ''n'' does not change with depletion. If subscript ''p'' denotes the present depletion state and subscript ''f'' a future state, the present and future characteristic factors are related as follows:
Depletion usually results in deterioration of the IPR ([[:file:fundamentals-of-fluid-flow_fig6.png|Figure 6]]). These changes can be predicted quantitatively by calculating the changes of the characteristic constants: ''j'', ''c'', ''q''<sub>ax</sub> ''A'', and ''B''. The exponent ''n'' does not change with depletion. If subscript ''p'' denotes the present depletion state and subscript ''f'' a future state, the present and future characteristic factors are related as follows: