(from the article `heavy oil and tar sand`) crude oils below 20° API gravity are usually considered to be heavy. The lighter conventional crudes are often waterflooded to enhance recovery. The ... An even more widely practiced secondary recovery method is waterflooding. After being treated to remove any material that might interfere...
Found on
http://www.britannica.com/eb/a-z/w/14
a method of improved recovery in which water is injected into a reservoir to remove additional quantities of oil that have been left behind after primary recovery. Waterflooding usually involves the injection of water through wells specially set up for water injection and the removal of water and oil from production wells drilled adjacent to the injection wells. ...
Found on
http://www.encyclo.co.uk/visitor-contributions.php
the injection of water into an oil reservoir to “push� additional oil out of the reservoir rock and into the wellbores of producing wells.
Found on
https://www.encyclo.co.uk/local/20857
No exact match found.
