Water Drive 2 : The Reservoir-Drive Mechanism whereby oil is produced by the expansion of the underlying water, which forces the oil into the wellbore. (ITOGP)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}