PTA analysis

Dear RE`s

Nowadays I am working on PTA analysis (build up test),I try to build an excel sheet fit with this purpose .
but unfortunately I have problem with pressure derivative calculation.
it will be my pleasure If any one has a such excel sheet or an advice .

Regards

Der pet_engi,

In the past I built an spreadsheet for such purposes, unfortunatelly I can't share it since it's now property of the last company I worked for. However, pressure derivatives can be easily calculated using Forward, Central or Backward numerical differentiation. Since the error of the Central difference approximation is less than that of the other two methods, this is the preferred approximation.

Check here.

[url]http://www.welltestsolutions.com/BasicSurv.htm[/url]

[QUOTE=pet_engi;260656]Dear RE`s

Nowadays I am working on PTA analysis (build up test),I try to build an excel sheet fit with this purpose .
but unfortunately I have problem with pressure derivative calculation.
it will be my pleasure If any one has a such excel sheet or an advice .

Regards[/QUOTE]

Check here.

[url]http://www.welltestsolutions.com/BasicSurv.htm[/url]

[QUOTE=pet_engi;260656]Dear RE`s

Nowadays I am working on PTA analysis (build up test),I try to build an excel sheet fit with this purpose .
but unfortunately I have problem with pressure derivative calculation.
it will be my pleasure If any one has a such excel sheet or an advice .

Regards[/QUOTE]

Dears
Thanks a lot for your valuable advice.
Regards

Dear DAH7542

Firs of all I would to say many thanks for your quick response
I need this spread sheet for personal using ,not for a public use ,
so that if you can share a part of your spread sheet ,it will be my pleasure
Warm Regards

Thank you!