tar crudes

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• heavy oil and tar sand — Introduction       crude oils (crude oil) below 20° API gravity are usually considered to be heavy. The lighter conventional crudes are often waterflooded to enhance recovery. The injection of water into the reservoir helps to maintain reservoir… …   Universalium

• Heavy crude oil — or Extra Heavy oil is any type of crude oil which does not flow easily. It is referred to as heavy because its density or specific gravity is higher than of light crude oil. Heavy crude oil has been defined as any liquid petroleum with an API… …   Wikipedia

• petroleum — petroleous, adj. /peuh troh lee euhm/, n. an oily, thick, flammable, usually dark colored liquid that is a form of bitumen or a mixture of various hydrocarbons, occurring naturally in various parts of the world and commonly obtained by drilling:… …   Universalium

• Oil sands — The Athabasca oil sands in Alberta, Canada, are a very large source of bitumen, which can be upgraded to synthetic crude oil. Bituminous sands, colloquially known as oil sands or tar sands, are a type of unconventional petroleum deposit. The… …   Wikipedia

• Petroleum — For other uses, see Petroleum (disambiguation). Proven world oil reserves, 2009 …   Wikipedia

• Unconventional oil — is petroleum produced or extracted using techniques other than the conventional (oil well) method. Oil industries and governments across the globe are investing in unconventional oil sources due to the increasing scarcity of conventional oil… …   Wikipedia

• Nikolai Kudryavtsev — Nikolai Alexandrovich Kudryavtsev Russian: Николай Александрович Кудрявцев (Opochka, October 21, 1893 Leningrad, December 12, 1971) was a Soviet Russian petroleum geologist. He is the founding father of modern abiogenic theory for origin of… …   Wikipedia

• Dilbit — is diluted bitumen. Per the Alberta Oil Sands Bitumen Valuation Methodology, Dilbit Blends means Blends made from heavy crudes and/or bitumens and a diluent usually condensate, for the purpose of meeting pipeline viscosity and density… …   Wikipedia