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Is petroleum an igneous rock sedimentary rock or metamorphic rock?
sedimentary, the oil is formed within a source rock formed with high quantities of decomposed vegetation, then a reservoir rock which holds the oil and a capping rock which seals it shut in addition to this sequence of rocks, certain structures are required to stop the oil escaping, a classic would be an anticline
What is the definition of oil rim?
In petroleum engineering, an oil rim field is an oil field with a relatively thin oil zone below a gas cap. At the edges of the reservoir there will ususally be an area where the top of the reservoir is below the gas/oil contact, thus forming a "rim" containing only oil, with no overlying gas.
What is the biggest oil reservoir in the world?
The world's oil reserves are where the world's oil supplies are located. This is exceptionally important in monitoring the world's oil supply.
What is crude extraction?
Oil is produced or extracted from underground reservoirs as explained in the first link. So extraction of oil is the same as the removal of oil from its reservoir. Some oil is not easy to produce. For oil sands (see related link) there are a number of extraction techniques to get the oil from the underground reservoir to the surface.
What is difference between oil shale rock and a rock?
one has oil shale and one dosent
What is the definition of Displacement efficiency in petroleum Engineering for oil reservoir?
The displacement efficiency refers to the fraction of the oil in place that is swept from a unit volume of the reservoir. Displacement efficiency is a function of fluid viscosities and the relative permeability characteristics of the reservoir rock (mobility ratio), of the “wettability” of the rock, and of pore geometry.
What impermeable rock that occurs at the top of an oil reservoir?
well according to my research impermeable rock that occurs at the top of an oil reservoir is called cap rock
What impermeable rock occurs at the top of an oil reservoir?
well according to my research impermeable rock that occurs at the top of an oil reservoir is called cap rock
What is the best reservoir rock?
Porous sandstone is a good reservoir rock for its porosity enables it to store the fluid (oil?) and also to allow easy release. Compare with oil shale, where the rock is very fine grained and will not release the fluid easily. Both would ideally be capped with an impermeable cap rock to constrain the oil.
At the top of an oil reservoir is a layer of?
oil, gas, rock, water
What type of rock stopped the oil and gas from seeping back up to surface?
These are known as cap rocks and can be formed of any low permeability rock.
What is the difference between primary and secondary migration of hydrocarbon?
There are two types of migration when discussing the movement of petroleum, primary and secondary. Primary migration refers to the movement of hydrocarbons from source rock into reservoir rock and it is this type that the following discussion refers to. Secondary migration refers to the subsequent movement of hydrocarbons within reservoir rock; the oil and gas has left the source rock and has entered the reservoir rock. This occurs when petroleum is clearly identifiable as crude oil and gas although the gas may be dissolved in the oil. Buoyancy of the hydrocarbons occurs because of differences in densities of respective fluids and in response to differential pressures in reservoir rock.
What is end-point scaling in reservoir simulation?
Oil-WaterSWL = 0.2 SWCR = 0.22 SOWCR = 0.2 KRO = 0.9 KRW = 1 SORW = 0.2 KRORW = 0.8Saturation table end-point scaling (SWCR, SGCR, SOWCR, SOGCR, SWL)SWCR - critical water saturation (that is the largest water saturation for which the water relative permeability is zero)SOWCR - critical oil-in-water saturation (that is the largest oil saturation for which the oil relative permeability is zero in an oil-water system)SWL - connate water saturation (that is the smallest water saturation in a water saturation function table)Relative permeability end-point scaling (KRW, KRG, KRO, KRWR, KRGR, KRORG, KRORW)KRW - relative permeability of water at maximum water saturation parameterKRO - relative permeability of oil at maximum oil saturation parameterKRWR - relative permeability of water at residual oil saturation (or residual gas saturation in a gas-water run) parameterKRORW - relative permeability of oil at critical water saturation parameter
How does solid rock become oil?
There are two invalid assumptions here: rock is solid and oil comes from rock. All rock is porous and permeable: fluids like water, oil, and gas can pass through them slowly over time. Oil (petroleum) is a fossil fuel made from partially decomposed plant and animal matter that has been buried deep by geological activity and "cooked" by the high pressure and temperature. Once formed it migrates through rocks of high permeability until it gets trapped under a layer of rock of low permeability. If it does not get trapped this way then it rises to the surface, producing oil seeps or tar pits. When we find oil in rock it did not form in that rock, it always formed elsewhere then collected where it was found.
What is the difference between water injection and water flooding?
I do not think that there is any difference. Petroleum engineers normally inject water into an oil reservoir to maintain the reservoir pressure (and hence the ability of the reservoir to pump oil to the surface). In the process and if the water injection wells are properly located, the injected water normally sweeps (pushes out) out more oil effectively flooding the reservoir and increasing the amount of oil that is recovered from the reservoir. This incremental oil will otherwise be left behind in the reservoir. Hence, in an oil reservoir where the natural aquifer is large and strong enough to maintain the reservoir pressure, water injection is unlikely to significantly increase the oil recovery from the reservoir.
Which characteristic is absolutely necessary for a sedimentary rock to have potential as a possible reservoir rock for oil or gas?
High Porosity in order for the gases and oils to penetrate but must have a cap rock to contain the floating gases and oils
Why is there bubbles in oil reservoir?
Oil level is overfull.
