FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil and gas industry, in particular, to above-packer water-based fluids, preventing heat transfer from productive formation to extra-icy frozen rocks. Above-packer fluid for operation of gas wells in zone of extra-icy frozen rocks contains, wt%: sodium formate is 45.0-50.0, polyacrylamide and Praestol 2540 polyacrylate copolymer is 1.3-1.5 and water is rest.
EFFECT: technical result is increase of frost resistance and stability.
1 cl, 1 tbl
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