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Productivity Index for injection wells:

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J^{\downarrow} = \frac{q^{\downarrow}}{p_{wf} - p_e}

where

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bodyq^{\downarrow}

flowrate (the specification of which may differ, see below)

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bodyp_e

formation pressure

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bodyp_{wf}

bottom hole pressure at sandface under injection


The definition of flowrate 

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bodyq
 and formation pressure 
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bodyp_e
 may vary depending on application of productivity index

See Also


Petroleum Industry / Upstream / Production / Subsurface Production / Well & Reservoir Management

Subsurface E&P Disciplines / Production Technology 

Productivity Index ]