Absolute permeability

[ibtisam01]

Is absolute permeability , the property of reservoir rock or the property of reservoir fluid? Is there any difference in measurement of absolute permeabilities in the following three cases when the rock is fully saturated with:

1. Water
2. Oil
3. Gas

Thanks in advance

[temr]

Absolute permeability is permeability by -m*(influx/delta_p) so it is permeability of single phase since you take in to account viscosity
So your answer to your question ?)

[temr]

Absolute permeability is permeability by -m*(influx/delta_p) so it is permeability of single phase since you take in to account viscosity
So your answer to your question ?)

[ibtisam01]

i think you didn't get my point, i also didn't get your point. anyways lots of thanks..........

Absolute permeability is permeability by -m*(influx/delta_p) so it is permeability of single phase since you take in to account viscosity
So your answer to your question ?)

[ibtisam01]

i think you didn't get my point, i also didn't get your point. anyways lots of thanks..........

Absolute permeability is permeability by -m*(influx/delta_p) so it is permeability of single phase since you take in to account viscosity
So your answer to your question ?)

[DAH7542]

Absolute permeability is a rock property no matter what fluid is saturating the rock; it is strongly related to the pore size and the pore size distribution. Having said that, lab test measurements using any displacing fluid (liquids or gases) should yield the same absolute permeability value for the same rock sample. This holds true if the fluid being used during the test (liquid or gas) is non-reactive with the rock components; water for example is not usually used in lab tests since it might react with authigenic clays, changing the pore structure of the rock and thus yielding erroneous absolute perm values. For lab measurements, gases are preferred since they are not reactive with the rock minerals, however, gas-derived absolute perm values should be corrected for gas slippage (Klinkenberg correction).

[Yengineer]

Exactly, permeability is the capability of rock media to "transmit" fluid. It is rock property assuming no fluid-rock interaction.

[Ahmed Essam Tawfik]

permeability is a rock property that measure the ability of rock to transmit fluids through it , and the absolute permeability is measured when the rock is 100% saturated with single fluid ..
so the type of fluid will affect the permeability due to its interface with rock "you can say wettability" , "don't forget viscosity"
so K"measured by gas" > K"measured by oil " > K " measured by water "

[Sequestrator]

thats correct, absolute permeability is property of rock. No matter what gas you use for measurement in lab, Klinkenberg corrected value should give the same absolute permeability value.
This is important when you perform relative permeability measurement, because some procedures use value of permeability of a observed fluid when 100% flow of that fluid occurs. But this value is not the same permeability value as absolute - this only the maximum effective permeability that can be obtained from a two (or three) phase system.
Then, you should be sure if the relative permeability (or back calculated effective perm) is obtained as curve calculated from absolute permeability, maximum permeability, and also is the kr curve normalized.

[Sequestrator]

thats correct, absolute permeability is property of rock. No matter what gas you use for measurement in lab, Klinkenberg corrected value should give the same absolute permeability value.
This is important when you perform relative permeability measurement, because some procedures use value of permeability of a observed fluid when 100% flow of that fluid occurs. But this value is not the same permeability value as absolute - this only the maximum effective permeability that can be obtained from a two (or three) phase system.
Then, you should be sure if the relative permeability (or back calculated effective perm) is obtained as curve calculated from absolute permeability, maximum permeability, and also is the kr curve normalized.