FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil and gas industry, in particular to compositions for isolation of water influx in production wells, control of processed formation coverage and injection well intake profile profile, and can be used in low-temperature wells. Gelling compound contains 1.1–4 pts.wt. of polyacrylamide, 0.13–0.65 pts.wt. of chromium acetate, 0.3–3.0 pts.wt. of ammonium sulphate and 100 pts.wt. of water. Polyacrylamide has molecular weight of 1–2.5 million amu and anionicity of 3–10 %. Water is represented by fresh or mineralized water with chloralcesium mineralization with density from 1,000 to 1,190 kg/m3.
EFFECT: high efficiency of the gel-forming composition owing to high strength of the gel, controlling gel formation time, all-seasonal use thereof due to possibility of preparation on bed mineralized water, as well as broader technological capabilities of the composition owing to use in low-temperature wells.
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