METHOD FOR PERFORMING SECOND COMPLETION OF RESERVOIRS IN GAS WELLS Russian patent published in 2006 - IPC E21B43/11 

FIELD: oil and gas extractive industry.

SUBSTANCE: in accordance to method down to man-made face of well a tubing string is lowered with a cone. Well is transferred to mode of second reservoir completion liquid, as which oil products are used or gas condensate with specific weight ranging from 0,7 to 0,9 g/cm³. Cone is mounted above the perforation interval at distance amounting to 10-15% of bed thickness. Secondary completion liquid is forced out of the well to create less than 20 kg/cm² of depression on reservoir. Charges are lowered into the well, which are used to perforate from 2 to 5% of reservoir thickness in its lower interval. Gas influx from reservoir is caused. Removal of technical liquids from well is performed by processing perforated well zone with gas. Remaining upper section of bed is perforated during balanced pressure of gas in reservoir and in well channel. Then during time ranging from 30 to 48 hours face-adjacent reservoir zone is cleaned entirely from drill mud by dropping gas from well onto the torch. Research operations are performed. Methanol in amount ranging from 3m³ to 7m³ is forced to well bottom.

EFFECT: increased efficiency of second completion of reservoirs.