Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Oil Loss (Smearing) Due to Gas Cap Blowdown

Oil Loss (Smearing) Due to Gas Cap Blowdown

Oil Loss (Smearing) Due to Gas Cap Blowdown


Thanks for looking at my thread/question. First post here.

I have a large oil reservoir (14-30 MMBO OOIP) that had a large initial gas cap. The oil band is approximately 20 feet thick. Wells in this oil band had poor performance due to gas and water coning. For example, wells perfed in the oil band producing at extremely high GORs (100,000+) and WORs (>0.90). In order to mitigate this poor performance, the operator completed wells in the gas cap and blew it down. Oil moved into the gas cap and was produced.

However, you would lose some oil due to residual loss. From the few sources I have, the new hydrocarbon saturation would be gas saturation + a new oil saturation of the rock. I am at a loss on how to calculate this oil loss.

If you do not have an answer, can anyone point me in the right direction? I have had trouble finding documentation in papers and textbooks on calculation oil loss due to gas cap blowdown. I've only found instances of a gas cap moving into the oil zone.



Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close