Petroleum Goodies: Damaged Zone |
| Posted: 24 May 2011 10:00 AM PDT Damaged Zone: The local area around the wellbore which has been impaired through the drilling activity, normally due to mud or cement-filtrate intrusion. Near-wellbore impairment can substantially impact efficiency and is generally simpler to avoid compared to fix. Even though typically present, a lightly damaged area around the wellbore can be bypassed by perforation channels to generate connecting conduits from the wellbore to the undamaged reservoir zone. More serious cases of damage may need a matrix-acidizing treatment to regenerate the natural permeability, or a hydraulic fracturing solution to generate a new high-conductivity flow direction to the reservoir. Generally used in perforating, well completions. Similar Posts: |
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