Petroleum Goodies: Underbalance |
| Posted: 23 May 2011 10:00 AM PDT Underbalance: The sum of pressure applied on a formation exposed in a wellbore below the internal fluid pressure of that formation. When decent permeability and porosity present, formation fluids get into the wellbore. The drilling rate usually accelerates as an underbalanced situation is reached. Commonly used in drilling. Similar Posts: |
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