DIRECT STEAM GENERATOR DEGASSING

摘要

Systems and methods generate steam mixed with desired non-condensable gas concentrations using a direct steam generator. Injecting the steam into a reservoir may facilitate recovering hydrocarbons from the reservoir. Cooling an output of the direct steam generator produces water condensate, which is then separated from the non-condensable gas, such as carbon dioxide. Reducing pressure of the condensate subsequently heated by cross-exchange with effluent of the direct steam generator regenerates the steam with the carbon dioxide removed for the injection.

主权项

1. A method of recovering hydrocarbons with steam, comprising:
vaporizing water by direct contact of the water with combustion products to produce a resulting fluid including the steam and carbon dioxide; cooling the fluid to provide a mixture of the carbon dioxide and water condensate; separating a gas phase with the carbon dioxide from a liquid phase with the condensate; regenerating the steam by reducing pressure and then heating the condensate in a heat exchanger for thermal transfer with the fluid; and injecting into a formation the steam with the carbon dioxide removed for recovery of the hydrocarbons.