FIELD: chemistry.
SUBSTANCE: invention relates to oil and gas industry and can be used for controlling water and gas flows and squeeze cementing in injection oil wells and high temperature gas wells of 56 to 120°C. Polymer backfilling composition for isolation of water and gas flows in injection oil wells and high temperature gas wells comprises 50 wt % of carbamide-formaldehyde resin, 0.5-3.0 wt % of acid hardener in the form of 30% aqueous solution of copper sulphate, 47.0-49.5 wt % of inert filler for strength regulation.
EFFECT: improved temperature range, strength and density regulation of the backfilling composition.
2 cl, 1 ex, 1 tbl
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