(n.) Heavy Oil. A designation for a hydrocarbon fluid with a gravity of 10° API or lower, based upon the classification of the US Department of Energy. Syn: bitumen
Schlumberger Ltd. (The World's Leading Supplier Of Technology, Integrated Project Management And Information Solutions to Customers Working in The Oil and Gas Industry Worldwide), Schlumberger Oilfield Glossary Cedex, France 2014. http://www.glossary.oilfield.slb.com/en/Terms/sym/ a.aspx, (Ergo - Brit) {766}