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It measures how efficiently waterflood supports the oil production and represent one of the key Waterflood Diagnostics.


The PIR can be related to the current VRR as:

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(see 

LaTeX Math Block Reference
anchorVRR_PIR
pageVoidage Replacement Ratio (VRR or Instantenous VRR)
for derivation)


See Also

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Petroleum Industry / Upstream /  Production / Subsurface Production / Field Study & Modelling /  Production Analysis / Waterflood Diagnostics