Relative Permeability Curves MBAL IPM

[zaheer.jamali]

hope u all would be fit and fine .plz find the attachment.

i m facing problem in Mbal Regarding Relative Permeability curves
actually i dont have any relative k data means i dont have any kind of scale data , and i havent any near by well data.

so plz tell me is there any kind of correlation for these calculations plz notify me
p

[halim78]

Hello,
If you don't have SCAL data in your field, there is no other way to estimate them.

[reservoir_engineer]

Friend,
you will simply use corey correlations with the most common exponents and end points.
later you will regress on these items for FW and FG match.
you are dealing with material balance so relative permeability not included in any calculations.
it will be used only in predictions to give accurate predictions Fw or Fg values.
this is what i think, if it is wrong, i hope someone correct for me.
regards,

[mid]

you probably know something about wettability, so you can estimate three cases of corey exponents, then from log analysiy get the petrophysicist to give you swi and sor then you have sort of start till you get SCAL data or if you have capillary pressure data or NMR just use them to derive synthetic relative permeability curves

[zaheer.jamali]

hello sir do u have any material regarding this
book spe paper i want to calculate this by myself.

can we say prediction is simply decline of the production with respect to the relative permeability

[zaheer.jamali]

halim78
View Profile View Forum Posts Private Message View Blog Entries View Articles Add as Contact
Member Join Date:Apr 2009
Posts:50

--------------------------------------------------------------------------------
Did you find this post helpful? |
Hello,
If you don't have SCAL data in your field, there is no other way to estimate them.

but can u suppose it from ur production data

[DAH7542]

zaheer.jamali, take a look at this previous post regarding your question:

[link Point to another website Only the registered members can access]
As for your request of papers and books: Honarpour - Relative permeabiility

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

[itag]

All
With regard to specifying rel-perm for MBAL - you need to recognise that becasue MBAL gnerally reduces the reservoir to just a few blocks - that using core rel-perms and/or rel-perms from a 3D conventional reservoir simulator WILL NOT be suitable/reasonable.

MBAL relperms are often history matched using a 0-D buckley leverett proxy model - and often the shape of the rel-perms looks suspiciusly like "pseudos" that were popular in coarse 3D /2D models in the 70's and 80's. Often - Corey exponents can still be used in these cases - they just wont look like your lab data.

THe concept of rel-perms can still be useful - but MBAL geometry/timescales/forces are very different from lab/3D reservoir simulators - hence the need to take different viewpoints. Expressed another way the MBAL user and the reservoir simulation engineer cannot (in general) swap rel-perm data sets !!.

Unfortunately - the only relevant refrerences on "upscaling" are still the material from the '70's and 80's. (eg Coats / Stiles / Hearn)

I'd be interested in other folks experience/opinion here.
itag

[petroboll]

Friend Your right, the balance Material not use Relative Permeability Curves, It only use in the prediction, it estimate the saturation of gas and water.

[naqvi]

Hallo everione.....

I am working on MBAL and I need to calculate Relative permeabilities for each tank/wells for three different models of an abandoned field.Now the problem lies that if I use Corey correlation parameters to input values. then I would be needing J-Functions for which further the contact angle and Surface tension values are unknown and capillary pressure is know only for one tank of one model.It is very important that I need to have a perfect Fw curve match once I come to predictions.
and using assumptions I will increase the Uncertainity of my input data. Can anyone please help me and suggest another alternate for calculating Rel.Perms.and It would be a grace if I am answered in a bit detail....

THanks and waiting for reply....

[vinomarky]

Sounds like you have unrealistic expectations - you simply don't expect "perfect Fw curve match" from essentially a material balance modeling tool

Even with a detailed reservoir simulation model you'd be a brave person to 'guarantee' perfect Fw predictions. Put more efforts into establishing what the possible range of Fw curves could be. Ensure your development plan is not compromised over the range of reasonable outcomes and live with the uncertainty.

[naqvi]

thanks, let me try to get some results and then I can put forward somthin