[need] Permeability Estimation Books and Papers

[abdulasad]

i urgently need some material on permeability estimation
can anyone please hep me????

[vinomarky]

From seismic?
From logs?
From porosity?
From production?

What is it you are trying to achieve?

[abdulasad]

i need a complete step by step guide of permeability estimation and comparision of the methods involved. actually i have to write a complete report on the permeability estimation methods for my university magazine.

[vinomarky]

Good luck - each one of those topics could (if not already) have complete books published on them. While we are at it, you can also add to the list calculating perm from well tests and from capillary pressure tests to name but a few more.

In my opinion, a 'complete' and 'step-by-step' guide of permeability estimation methods is simply beyond the scope of what you will be able to do. Strongly suggest you narrow your focus to one or two of the main methods, and highlight some of the oft used workflows.

[abdulasad]

okk

then i will be willing to know about the seismic methods and from the production data.

[Nabilia]

Seismic Signatures and Analysis of Reflection Data in Anisotropic Media - Handbook of Geophysical Exploration - Seismic Exploration Vol. 29 2001.pdf 22.031 MB

[link Point to another website Only the registered members can access]
Seismic Stratigraphy, Basin Analysis and Reservoir Characterisation - Handbook of Geophysical Exploration - Seismic Exploration Vol. 37 2007.pdf 30.608 MB

[link Point to another website Only the registered members can access]

[abdulasad]

Good luck - each one of those topics could (if not already) have complete books published on them. While we are at it, you can also add to the list calculating perm from well tests and from capillary pressure tests to name but a few more.

In my opinion, a 'complete' and 'step-by-step' guide of permeability estimation methods is simply beyond the scope of what you will be able to do. Strongly suggest you narrow your focus to one or two of the main methods, and highlight some of the oft used workflows.

how permeability is estimated through capillary pressure test

[vinomarky]

You can estimate pore throat radius from capillary pressure r = 0.1451 x 2 sigma.cos(theta) / P (r = microns)

For each incremental step in saturation, calculate radius and delta saturation. Plot these against each other and you'll normally see a dominant peak which represents that pore throat radius that dominates the sample. Calculate the volume weighted average pore throat radius = sum(r x delta Sw) / (1-Min Sw). If you have bi-modal peaks (ie primary and capillary bound porosity etc) then you may want to experiment with including/excluding the smaller peak

As an aside, a 1 micron pore throat radius is often a good cutoff for oil reservoir pay discrimination, so you can pro-rate the proportion of sample > 1 micron / Total against the total porosity to estimate an effective porosity with this method

A (gu)estimate of perm from effective average pore throat radius can then be made by Perm = 10^(1.6337*LOG(2*sum(r x delta Sw)*100)-2.2081). This can be an order of magnitude out easily, but then again so can poro/perm crossplots. It is quite often a useful technique when (for example) you have drill cuttings that you can do Hg Pc work on, but you have no core.

Note: the perm equation above came from a person who has done thousands of Hg Pc tests, and developed the correlation himself. He was planning on submitting a paper, so you may find slightly updated equations if you search online for any papers on the topic.

[abdulasad]

ver very thanks vinomarky
i really needed that one