Percentage of total hydrocarbon reserves recovered by a given time moment t:
(1) | {\rm RF}(t) = \frac{{ \rm V_{recovered \ reserves}}(t)}{{\rm V_{total \ reserves}}} |
It always ranges 0 \leq {\rm RF}(t) \leq {\rm EUR} \leq 100 \% and is related to Depletion Factor (DF) as:
(2) | {\rm RF} (t) = {\rm EUR} \cdot {\rm DF}(t) |
where EUR is Estimated Ultimate Recovery.
The Oil Recovery Factor (RFO) is defined as ratio of cumulative oil production Q^{\uparrow}_O to STOIIP V_{\rm STOIIP}:
(3) | {\rm RFO} = \frac{Q^{\uparrow}_O}{V_{\rm STOIIP}} |
The Gas Recovery Factor (RFG) is defined as ratio of cumulative gas production Q^{\uparrow}_G to STGIIP:
(4) | {\rm RFG} = \frac{Q^{\uparrow}_G}{V_{\rm STGIIP}} |
See Also
Petroleum Industry / Upstream / Production / Subsurface Production / Field Study & Modelling / Production Analysis
[ Depletion Factor (DF) ] [ Oil Recovery Factor (RFO) ] [ Gas Recovery Factor (RFG) ]