Nitrogen, produced by air separation and compressed to high pressure has many potential applications in enhanced oil and gas recovery. Possible applications include using nitrogen as a driving gas for costly and limited carbon dioxide, and in some cases for miscible displacement. The displacement of gas cap gas, the production of attic reservoirs, the cycling of condensate reservoirs, the maintenance of reservoir pressure and other applications can also be considered. Nitrogen can be produced at almost any reservoir site using proven technology and various energy sources. Depending upon the pressure, quantities, and location, nitrogen may cost one-quarter (1/4) to one-half (1/2) the price of natural gas. Using existing technology, nitrogen can be separated from the produced associated natural gas.

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