Percentage of recoverable hydrocarbon reserves recovered by a given time moment t:
| (1) | {\rm DF}(t) = \frac{{\rm V_{recovered \ reserves}}(t)}{{\rm V_{recoverable \ reserves}}} |
It always ranges 0 \leq {\rm DF} \leq 100 \% and is related to Recovery Factor (RF) as:
| (2) | {\rm DF}(t) = \frac{[\rm RF}(t)}{EUR} |
where EUR is Estimated Ultimate Recovery.
The Depletion Factor concept splits naturally into two categories:
| Oil Recovery Factor (RFO) | Gas Recovery Factor (RFG) | ||||||
|---|---|---|---|---|---|---|---|
|
| ||||||
Q↑OQO↑ | cumulative oil production | Q↑GQG↑ | cumulative gas production | ||||
VSTOIIPVSTOIIP | STOIIP | VSTGIIPVSTGIIP | STGIIP | ||||
See Also
Petroleum Industry / Upstream / Production / Subsurface Production / Field Study & Modelling / Production Analysis