Statoil Asa

Petrosa (the Petroleum Oil & Gas Corporation of Sa (pty) Ltd)

Petro Sa

Jan Age Stensen

Erling Rytter

Ola Olsvik

Jostein Sogge

Gareth David Huntley Shaw

Gareth David Shaw

A method for increasing oil recovery from an oil reservoir in which method surplus gas streams from a plant for synthesis of higher hydrocarbons from natural gas is injected into the reservoir, is described. The surplus streams from the plant is the tailgas from the synthesis and optionally nitrogen from an air separation unit which delivers oxygen or oxygen enriched air to the plant for synthesis of higher hydrocarbons.

Method for increased oil recovery from an oil field

A method for increasing oil recovery from an oil reservoir by injection of gas into the reservoir, is described. The method comprises separation of air into an oxygen-rich fraction and a nitrogen-rich fraction, reformation of natural gas together with oxygen to produce a synthesis gas for production of methanol or other oxygenated hydrocarbons or higher hydrocarbons. The raw synthesis products and a waste gas from the synthesis are separated, and the nitrogen-rich fraction and at least a part of the waste gas are injected into the oil reservoir to increase the oil recovery from the reservoir. A plant for performing the method is also described.

Plant and a method for increased oil recovery

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Trondheim, Norway

Jan Age Stensen