METHOD FOR WELL COMPLETION (VARIANTS) Russian patent published in 2006 - IPC E21B43/117 

FIELD: oil and gas industry, possible use for completion of productive beds in oil and gas wells.

SUBSTANCE: cumulative and gas-generating charge of solid fuel, combined with a source of acidic reagent, is mounted in casing column. Gas-generating charge is initiated by cumulative charge. Perforation channel is made in casing column and surrounding productive bed. Gas, produced during combustion of gas-generating charge, is moved into perforation channel. On the side of end of gas-generating charge, facing the cumulative charge, axis-symmetric conic recess is made. For growth of filtration surface in front part of perforation channel, a cavern is formed. Thinning of walls of perforation channel at the portion of cavern and at the portion of perforation channel behind the cavern is formed. Following growth of entrance aperture in casing column and of perforation channel is created. In accordance to first variant, as gas-generating charge and source of acidic reagent, for beds composed of carbonate rocks, mixture of ammonium perchlorate and vinyl chloride polymer chlorinated resin is used. In accordance to second variant, as gas-generating charge and source of acidic reagent for beds, consisting of terrigenous rocks, mixture of ammonium perchlorate, fluorocarbon polymer and vinyl chloride polymer chlorinated resin is used.

EFFECT: increased productiveness of wells.

2 cl, 2 ex, 1 tbl, 3 dwg