MDT interpretation

[ultimcs]

hi all
I have 02 questions
1/ is anyone have a good excel model of MDT interpretation , i means trace gradient?
2/ how we choice the good pressure point that not affected my gradient and how we choice exacly our density?
thanks

[interactive]

Hi man,
1/
Standard: if Gradient pressure (Gp) < 0.15 (psi/ft)=> Gas, Gp > 0.15 (psi/ft) =>oil, Gp>= 0.433 (psi/ft)=>water.
If Gp = 0.15 psi/ft => maybe light oil or wet gas (iC5, nC5..)
Other case:
When I interpreted MDT/RCI... for another areas I see the Gp water value may be change with another areas from 0.425 - 0.433 psi/ft
If Gp < or = 0.08 (psi/ft)=> Dry Gas, 0.15 > Gp > 0.12(psi/ft) => Wet gas, 0.22 > Gp > 0.15 (psi/ft)=> light, 0.33 > Gp > 0.33 (psi/ft)=> Medium oil, 0.433 > Gp > 0.33 (psi/ft)=> heavy oil.
2/
+ Post all MDT points in the trend
+Checking pressure, If you see the value pressure at first depth larger than next depth. for example: at 1000m, P = 2000 psi, but at 1005m, P = 1990 psi => one of two MDT pressure points are not corrected.
+ Checking Mobility in these points.

......... Anybody please comment

Interactive

[06pg22]

Pretest points are selected based on interpreted or raw log. These points correspond to NPHI-DPHI crossover, lower GR, departed LLS-LLD and Higher porosity zones.

[abdou2403]

mobility values are used to choose good pressure points,

<0.5md/u ressure point is doubtful (tight), >0.5 we can trust on,

[i-anuar]

you can QC points if you plot with GR & RT. as suggested you can filter out or plot separately tight-ish points to see if they are supercharged or not. if you got plenty of points that might not be needed....

[abdou2403]

Dear all;

Is there any software devoted to establish Presure VS Depth crossplots and where we can also display GR or any other log such as DT, RHOB, NPHI, Rt,..in ths same plot

In excel, we can only build crossplots without logs.

Regards

[abdou2403]

this is an example of such softs but no med...: http://www.softwaregeek.com/mirror.php?sid=381793&index=1

[06pg22]

TechLog offers plotting MDT data with OH Logs

[abdou2403]

thanks bilal; so i have to learn techlog

[vergatario]

I think Emeraude may help you to do that. But using excel you it also possible to plot any variable against depth.