Refers to Petroleum Hydrocarbon initially present in Petroleum Reservoir before the anthropogenic invasion.
It consists of OIIP and GIIP.
The volumetric value of Hydrocarbon Initial In Place (HCIIP) in NTP conditions is given by STHCIIP :
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) ]