Patent ID: 7147058
Filing Date: 2006-12-12
Classification: E21B

Abstract:
1. A method for production of hydrocarbons with high and medium gas-oil ratio from a well with a wellhead and a bottomhole communicating with a formation, and with a casing and a tubing located inside said casing and forming a space therebetween, the method comprising the steps of establishing a hydrocarbon-containing fluid flow inside the tubing from the bottomhole to the wellhead; introducing gas into the space between said casing and said tubing so that the gas passes into the tubing and enhances the flow of the hydrocarbon-containing fluid from the bottomhole to the wellhead with simultaneous reduction of pressure in the bottomhole resulting in an increase of a pressure differential between the formation and the bottomhole; and introducing in the bottomhole a device which simultaneously increases the pressure in the bottomhole so that the pressure differential between the formation and the bottomhole decreases and therefore a gas blockage in a near bottomhole zone of the formation is at least reduced to maintain an oil flow from the formation into the bottomhole.