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Percentage of total currently recovered  hydrocarbon reserves recovered by a given time moment  

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t
--uriencoded--Q_%7BHC%7D
from the Surface Tank Hydrocarbon Initial In Place (STHCIIP):

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{\rm RF}(t) = \frac{{ \rm VQ_{recovered \ reservesHC}}(t)}{{\rm V_{total \rm reservesSTHCIIP}}} \cdot 100 \%


It always ranges 

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body--uriencoded--0 \leq %7B\rm RF%7D(t) \leq %7B\rm EUR%7D EURF%7D \leq 100 \%25
and is related to Depletion Factor (DF) as:

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{\rm RF} (t) = {\rm EUREURF} \cdot {\rm DF}(t)

where EUR is Estimated Ultimate Recovery.


The Recovery Factor concepts concept splits naturally splits onto into two categories: 

Oil Recovery Factor (RFO)Gas Recovery Factor (RFG)


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{\rm RFO} = \frac{Q^{\uparrow}_O}{V_{\rm STOIIP}}



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{\rm RFG} = \frac{Q^{\uparrow}_G}{V_{\rm STGIIP}}

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bodyQ^{\uparrow}_O

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cumulative oil production

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body--uriencoded--Q%5e%7B\uparrow%7D_G

cumulative gas production

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bodyV_{\rm STOIIP}

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body--uriencoded--

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V_%7B\rm STGIIP%7D

STGIIP


See Also

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

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