Refers to all oil initially present in Petroleum Reservoir before the anthropogenic invasion.
The volumetric value of Hydrocarbon Initial In Place (HCIIP) in NTP conditions is given by STHCIIP :
The changes in STHCIIP over time can be caused by production from a given petroleum reservoir or because of the hydrocarbons migration caused by production at offset hydrodynamically connected petroleum reservoirs.
See Also
Petroleum Industry / Upstream / Exploration / Booking Reserves
[ Surface Tank Hydrocarbon Initial In Place (STHCIIP) ] [ Stock-Tank Oil Initial In-Place (STOIIP) ] [ Stock-Tank Gas Initial In-Place (STGIIP) ]