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Oil Initially In Place (OIIP)

Oil Initially In Place (OIIP)

What is 'Oil Initially In Place - OIIP'

The amount of crude first estimated to be in a reservoir. Oil initially in place differs from oil reserves, as OIIP refers to the total amount of oil that is potentially in a reservoir and not the amount of oil that can be recovered. Calculating OIIP requires engineers to determine how porous the rock surrounding the oil is, how high water saturation might be and the net rock volume of the reservoir.

Explaining 'Oil Initially In Place - OIIP'

Determining oil initially in place is one of the major components undertaken by analysts determining the economics of oil field development. Oil operations do not typically recover the entire amount of oil that a reservoir may have available, meaning that not all fields will be economical unless oil prices warrant the effort.


Oil Initially In Place (oiip) FAQ

How do you find the initial oil in place?

Calculating oil volume in place h = thickness of reservoir pay, in ft. Φ = porosity (decimal, not percent) Sw = water saturation (decimal, not percent) Boi = formation volume factor = 1.05 + (N × 0.05), where N = number of fts of gas produced per bblbarrels of oil (gas-oil ratio or GOR).

What is reserve estimation?

Reserves estimation is a very essential task in the petroleum industry. In this process, the economically recoverable hydrocarbons in a field, area, or region are evaluated quantitatively.

What is the recovery factor?

The recoverable amount of hydrocarbon initially available, expressed as a percentage. The recovery factor depends on the displacement mechanism. An important goal of enhanced oil recovery is to increase the recovery factor.

What happens when oil is removed from Earth?

When oil and gas is extracted, the voids fill with water, which is a less effective insulator. This means conduction of more heat from the Earth's interior to the surface, warming the land and the ocean.

How do you calculate oil recovery factor?

Sw = water saturation (decimal, not percent) Boi = formation volume factor = 1.05 + (N × 0.05), where N = number of fts of gas produced per bblbarrels of oil (gas-oil ratio or GOR). For example, if a well has a GORgas-oil ratio of 1,000, then Boi = 1.05 + (10 × 0.05) = 1.1.

What is hydrocarbon pore volume?

Subsequently, the hydrocarbon pore volume (HCPV) depends on the saturation of fluids in the porous network. Finally, the formation volume factor of oil and gas is necessary to convert the volumes under reservoir conditions of pressure and temperature to standard surface conditions.

Further Reading

The end of cheap oil: Bottom-up economic and geologic modeling of aggregate oil production curvesThe end of cheap oil: Bottom-up economic and geologic modeling of aggregate oil production curves
www.sciencedirect.com [PDF]
… Cairns and Davis (2001) introduce a capacity factor that initially constrains production to a plateau level, but … Source: Norwegian Petroleum Directorate, Fact Pages … The debate between 'concerned' and 'unconcerned' over future oil availability is sometimes described as a debate …

Wettability restoration of limestone cores using core material from the aqueous zoneWettability restoration of limestone cores using core material from the aqueous zone
www.tandfonline.com [PDF]
… Cairns and Davis (2001) introduce a capacity factor that initially constrains production to a plateau level, but … Source: Norwegian Petroleum Directorate, Fact Pages … The debate between 'concerned' and 'unconcerned' over future oil availability is sometimes described as a debate …

Field application of phenol formaldehyde gel in oil reservoir matrix for water shut-off purposesField application of phenol formaldehyde gel in oil reservoir matrix for water shut-off purposes
www.tandfonline.com [PDF]
… Cairns and Davis (2001) introduce a capacity factor that initially constrains production to a plateau level, but … Source: Norwegian Petroleum Directorate, Fact Pages … The debate between 'concerned' and 'unconcerned' over future oil availability is sometimes described as a debate …

A comparative study on carbon dioxide miscible injection modesA comparative study on carbon dioxide miscible injection modes
www.tandfonline.com [PDF]
… Cairns and Davis (2001) introduce a capacity factor that initially constrains production to a plateau level, but … Source: Norwegian Petroleum Directorate, Fact Pages … The debate between 'concerned' and 'unconcerned' over future oil availability is sometimes described as a debate …

Enhanced Oil Recovery Field Development: Process Flow of EOR Selection for Sandstone FormationEnhanced Oil Recovery Field Development: Process Flow of EOR Selection for Sandstone Formation
utpedia.utp.edu.my [PDF]
… Cairns and Davis (2001) introduce a capacity factor that initially constrains production to a plateau level, but … Source: Norwegian Petroleum Directorate, Fact Pages … The debate between 'concerned' and 'unconcerned' over future oil availability is sometimes described as a debate …

Resource estimation of eighty-two European shale formationsResource estimation of eighty-two European shale formations
library.seg.org [PDF]
… Cairns and Davis (2001) introduce a capacity factor that initially constrains production to a plateau level, but … Source: Norwegian Petroleum Directorate, Fact Pages … The debate between 'concerned' and 'unconcerned' over future oil availability is sometimes described as a debate …

National energy policies and the electricity sector in MalaysiaNational energy policies and the electricity sector in Malaysia
ieeexplore.ieee.org [PDF]
… Cairns and Davis (2001) introduce a capacity factor that initially constrains production to a plateau level, but … Source: Norwegian Petroleum Directorate, Fact Pages … The debate between 'concerned' and 'unconcerned' over future oil availability is sometimes described as a debate …

The effect of DC electrical potential on enhancing sandstone reservoir permeability and oil recoveryThe effect of DC electrical potential on enhancing sandstone reservoir permeability and oil recovery
www.tandfonline.com [PDF]
… Cairns and Davis (2001) introduce a capacity factor that initially constrains production to a plateau level, but … Source: Norwegian Petroleum Directorate, Fact Pages … The debate between 'concerned' and 'unconcerned' over future oil availability is sometimes described as a debate …

Effects of nanoparticle types on carbon dioxide foam flooding in enhanced oil recoveryEffects of nanoparticle types on carbon dioxide foam flooding in enhanced oil recovery
www.tandfonline.com [PDF]
… Cairns and Davis (2001) introduce a capacity factor that initially constrains production to a plateau level, but … Source: Norwegian Petroleum Directorate, Fact Pages … The debate between 'concerned' and 'unconcerned' over future oil availability is sometimes described as a debate …


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