FIELD: oil and gas industry.
SUBSTANCE: invention relates to the oil and gas industry, in particular to compositions for isolating absorbing zones when drilling wells of various categories, decrease in interval injectivity in the process of repair and insulation works (RIW) and repair and renewal operations (RRO). Blocking composition contains 0.6–1.0 % by weight of water-soluble anionic high molecular weight polyacrylamide (PAA), 7.0–7.4 % by weight of chrysotile as a filler and water.
EFFECT: technical result is an increase in the plugging properties of the composition by increasing its strength and viscoelastic characteristics.
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