FIELD: oil and gas production.
SUBSTANCE: backfilling composition contains product produced by interaction of oligophenyl-etoxysiloxane with oligoetoxysiloxane at weight ratio 1.0-4.0÷0.5-1.0 at presence of alcohol solution of alkali at contents of alkali in reaction weight 0.05-0.2 wt %, by hydrolysis of obtained product with water-alcohol mixture containing 5-20 wt % of water at presence of 0.05-1.0 wt % of nitric acid and by successive etherification with poly-glycol.
EFFECT: production of backfilling composition with long term of storage, controlled viscosity and time of curing.
3 cl, 2 tbl
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