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AssigneesThe Petroleum Oil and Gas Corporation of South Africa (Proprietary Limited), Statoil ASA
InventorsGareth David Huntley Shaw, Roger Johansen
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A method for recovering oil (24) from a natural oil reservoir (18) includes the steps of separating air to produce an oxygen rich stream (40) and a nitrogen rich stream (34), providing a natural gas stream (12) and feeding at least part of the oxygen rich stream (40) and the natural gas stream (12) into a gas to liquid or GTL conversion installation (42) to produce hydrocarbon products (44) and heat. The heat produced in the gas to liquid conversion installation is used to produce energy (20) to pressurize (16) the nitrogen in the nitrogen rich stream (34) to produce a pressurized nitrogen rich stream (22). The pressurized nitrogen rich stream (22) is passed into a natural oil reservoir (18) to enhance the recovery of oil (24) from the reservoir.
A method for recovering oil from a natural oil reservoir, the method including the steps of
A method of modifying an enhanced oil recovery process of the type in which a natural gas is fed into a natural oil reservoir to enhance oil recovery the method including
A method of modifying an enhanced oil recovery installation of the type in which a natural gas is fed into a natural oil reservoir, and which includes at least one natural gas feed line for feeding the natural gas into the reservoir, the method including
A method of modifying an enhanced oil recovery installation of the type in which a natural gas is fed into a natural oil reservoir, and which includes at least one natural gas feed line and a natural gas pressurization installation for feeding the natural gas into the reservoir, the method including
In a method of recovering oil from a natural oil reservoir in which pressurized nitrogen is pumped into the natural oil reservoir to enhance recovery of oil from the reservoir, the nitrogen being produced in an air separation plant which produces a waste oxygen stream having a purity of 70–100% and a high purity nitrogen stream, there is provided the improvement of
An installation for the production of gas to liquid (GTL) products and enhanced oil recovery from a natural oil reservoir, the installation including
A modified installation for the production of gas to liquid (GTL) products and enhanced oil recovery from a natural oil reservoir, the installation including pressurizing installation;
In a process in which pressurized natural gas is used for the enhanced recovery of oil, there is provided a method of replacing at least some of the natural gas with nitrogen such that the volume of the nitrogen is 1.5 to 2.5 times greater than that of the natural gas which it replaces, the method including diverting at least part of the natural gas to a gas to liquid (GTL) conversion installation which is linked to an air separation plant which produces an oxygen rich stream and a nitrogen rich stream;
In a process in which pressurized natural gas is passed into a natural oil reservoir for the enhanced recovery of oil, there is provided a method of reducing the volume of natural gas required for the enhanced oil recovery by between about 20% and 60%, the method including diverting at least part of the natural gas to liquid (GTL) conversion installation which is linked to an air separation plant which produces an oxygen rich stream and a nitrogen rich stream;
Dependencies are inferred from the claim text.