METHOD FOR GAS CONDENSATE DEPOSIT DEVELOPMENT Russian patent published in 2006 - IPC E21B43/22 

FIELD: gas condensate deposit development, particularly to increase productive reservoir output at later stage of well operation without formation pressure retaining when hydrocarbon condensate forms in producing well bottom zone.

SUBSTANCE: method involves performing periodical well bottom zone cleaning of hydrocarbon condensate generated as a result of formation pressure reduction by supplying solvent, which solves hydrocarbon condensate, in reservoir, wherein the solvent is mixture including acetone and pentane-hexane fraction; holding well as it is for condensate solving; removing the obtained solution from well bottom zone during well putting in operation. Before pentane-hexane fraction injection in well the fraction is saturated with gaseous hydrocarbon up to pressure of 0.3-1 MPa so that equilibrium gas blanket is created over liquid pentane-hexane fraction. Gaseous hydrocarbon mainly contains methane. Above pressure is maintained during mixture injection in reservoir.

EFFECT: increased output from producing gas condensate wells due to improved hydrocarbon condensate removal from pore space and well bottom zone reservoir permeability recovery.

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