Part of current Hydrocarbon In Place (HCIP) which can be economically recovered to the surface under specific FDP by the end of its producing life.
It comprises:
| Oil Reserves (OR) | Gas Reserves (GR) |
|---|---|
| ( also called Recoverable Oil ) | ( also called Recoverable Gas ) |
including condensate from natural gas | including solution gas from oil |
The volumetric value of Hydrocarbon Reserves (HCR) in NTP conditions is given by STHCR represented by two numbers: { Stock-Tank Oil Reserves (STOR) , Stock-Tank Gas Reserves(STGR) }
The percentage of recoverable Surface Tank Hydrocarbon Reserves (STHCR) taken from the total Surface Tank Hydrocarbon Initial In Place (STHCIIP) is called Estimated Ultimate Recovery Factor (EURF):
| (1) | \rm EURF = \frac{V_{STHCR}}{V_{STHCIIP}} \cdot 100 \% |
(don't get confused with Estimated Ultimate Recovery which is equivalent to STHCR).
Both formulas above do not have a practical meaning as Petroleum Production, accounting and sales are managed separately for Oil and Gas (see Oil Reserves (OR) and Gas Reserves (GR)).
Unlike Hydrocarbon Initial In Place (HCIIP), which is a geological category, the concepts of current Hydrocarbon In Place and Hydrocarbon Reserves depend on the parameters of FDP based on recovery method, recovery duration, surface logistics and economics.
There are different ways of classifying the Hydrocarbon Reserves which provide the primary insight into the size, uncertainty and structure of the Hydrocarbon Reserves.
See Also
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petroleum Geology / Petroleum Reservoir / Petroleum Reservoir Fluids / Petroleum Hydrocarbon / Hydrocarbon Initial In Place (HCIIP) / Hydrocarbon In Place (HCIP)
[ Exploration ][ Booking Reserves ] [ Hydrocarbon Reserves Classification ]
[ Oil Reserves (OR) ] [ Gas Reserves (GR) ] [ Estimated Ultimate Recovery Factor (EURF) ]