FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil industry, in particular to compositions for isolation of water influx in production and injection wells, and is intended for performance of water shutoff works in wells. Composition contains 45–55 wt% of 15–25 % aqueous solution of polyaluminium chloride and 45–55 wt% of a suspension of gypsum anhydrite, with a water-solid ratio of 0.9.
EFFECT: high efficiency of isolating water influx into the well due to obtaining a homogeneous, dense plugging mass formed when mixing components of the composition and gaining maximum strength over time, as well as broader technological capabilities of using the composition.
1 cl, 1 tbl
| Title | Year | Author | Number |
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