Volumetric value of Oil Initial In Place (OIIP) recalculated Total volume of subsurface oil reserves recalculated to NTP conditions:
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V_{\rm STOIIP} = \int_{\Omega} \left[ \frac{s_o({\bf r}) }{B_o} + \frac{R_v \, s_g({\bf r})}{B_g} \right] \phi_e({\bf r}) dV |
where
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Initial formation pressure and temperature at location
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Effective porosity at location
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Oil saturation and Gas saturation at location
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The STOIIP is often split into the Estimated Ultimate Oil Recovery (EUOR) and Non-recoverable Oil Reserves:
STOIIP = EUOR + Non-recoverable Oil Reserves
The estimation algorithm is based on STOIIP @model.
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See Also
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Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petroleum Geology / ExplorationPetroleum Reservoir / Booking ReservesOil Initial In Place (OIIP)
[ Surface Tank Hydrocarbon Initial In Place (STHCIIP) ] [ Stock-Tank Gas Initial In-Place (STGIIP) ]
[ Estimated Ultimate Oil Recovery (EUOR) ][ Non-recoverable Oil Reserves ]