Changes

In a strong water drive reservoir, the producing GOR remains fairly constant, reflecting the stable reservoir pressure. However, if the aquifer is unable to maintain reservoir pressure, the producing GOR will rise accordingly.

In a strong water drive reservoir, the producing GOR remains fairly constant, reflecting the stable reservoir pressure. However, if the aquifer is unable to maintain reservoir pressure, the producing GOR will rise accordingly.

Oil rates remain high under strong water drive until water breaks through in the producing wells. Water production usually occurs early in the field life of down structure wells, and the ''water-oil ratio (WOR)'' continues to increase with time as the oil-water contact moves upward. Gas lift may be required for high water cut wells to continue to flow.

Oil rates remain high under strong water drive until water breaks through in the producing wells. Water production usually occurs early in the field life of down structure wells, and the ''water-oil ratio (WOR)'' continues to increase with time as the [http://www.glossary.oilfield.slb.com/en/Terms.aspx?LookIn=term%20name&filter=oil-water%20contact oil-water contact] moves upward. Gas lift may be required for high water cut wells to continue to flow.

===Recovery===

===Recovery===