METHOD FOR WELL COMPLETION Russian patent published in 2014 - IPC E21B33/14 

FIELD: oil and gas industry.

SUBSTANCE: well completion method includes drilling, casing and cementing of the vertical borehole up to production horizon, drilling of a horizontal shaft. Water-saturated areas are identified. The perforated liner with open perforated holes is placed in the horizontal shaft, in the farthest part from the mouth with a cementing unit and perforated holes closed by acid-soluble plugs in the middle part and the whole part located closer to the mouth. Casing space of the liner middle part is cemented through the cementing unit with cement lifting up to the end to the whole part located closer to the mouth. The process is withheld for the period of cement hardening. Hydrostatic level is reduced and influx of reservoir fluid is obtained from the interval of the liner part farthest from the mouth. When influx is low, it is intensified in non-cemented part of the liner with shutoff of the remaining part by the packer with feedthrough hole. The plugged packer is set. Hydrochloric acid treatment is made for the middle part of the liner till magnesium plugs and part of the cement in casing annulus are dissolved. The well is flushed and influx is intensified from the medium part of the liner.

EFFECT: increase of well productivity.

1 dwg, 1 ex