Method for increased oil recovery from an oil field

US7677309B2 · kind B2 · utility

Assignees

• STATOIL ASA · NO
• Petrosa (The Petroleum Oil & Gas Corporation of SA (Pty) Ltd) · ZA

Inventors

• Gareth David Huntley Shaw · Kariega, ZA
• Ola Olsvik · Trondheim, NO
• Erling Rytter · Trondheim, NO
• Jostein Sogge · Sogndal, NO
• Jan Age Stensen · Trondheim, NO

Key dates

• Filing date: May 16, 2008
• Grant date: Mar 16, 2010
• Expiry date: May 16, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B2203/84
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

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.