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The changes in volume and structure of OIP over time can be caused by production from a given petroleum reservoir or because of the hydrocarbons migration caused by production from the remote hydrodynamically connected petroleum reservoirs.

For the initial volume and distribution of oil existed before the anthropogenic invasion refer to Oil Initial In Place (OIIP).

The concepts of Oil In Place (OIP) and Oil Initial In Place (OIIP) are equivalent before the anthropogenic invasion.

See Also

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Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petroleum Geology / Exploration Petroleum Reservoir / Booking Reserves[ Petroleum Reservoir Fluids / Hydrocarbon Initial In Place (HCIP)

[ Exploration ] [ Booking Reserves ] [ Gas  Oil Initial In Place (GIIPOIIP) ] [ Surface Tank Hydrocarbon Oil In Place (STHCIPOIP) ] [ Stock-Tank Oil In-Place (STOIP) ] [ Stock-Tank Gas Initial In-Place (STGIIP) ]