FIELD: gas production industry.
SUBSTANCE: invention provides gelling composition for killing wells when performing repair operations under abnormally low formation pressures, which composition contains 8-10% lignosulfonate reagent, 3-5% polymer material "Konkrepol" as gelation agent, and water, said lignosulfonate reagent being selected from group consisting of industrial-grade lignosulfonate, condensed sulfite (distillery dregs), ferrochromolignosulfonate, and lignase. Use of this composition increases well killing efficiency owing to formation of stronger structure of gel with low filtrate-output values preserved. Natural permeability of producing formations is unchangeable after unblocking, which reduces well development time.
EFFECT: improved performance characteristics of gelling composition, expanded assortment of gelling substances, and accelerated composition preparation.
2 cl, 2 dwg, 9 ex
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