| 摘要 |
FIELD: oil and gas production. ^ SUBSTANCE: invention relates to building wells and major repairs thereof, namely involving supporting casing strings and creating fluid-proofing isolation covers within chemical deposit interval as well as to exploitation of deposits and well abandonment. Grouting mix contains 50.00-53.95% calcium sulfate (gypsum semihydrate), 2.00-8.50% hardening additive constituted by fine mineral substance "Mikrodur-26RX", 0.05-0.08% nitrilotrimethylphosphoric acid, 41.42-44.00% sodium chloride solution having density 1.18 g/cc. ^ EFFECT: expanded technological possibilities of grouting mix due to proper pumpability and setting times, enhanced fluid-proofness and durability of grouting stone under complicated water-exchange conditions. ^ 2 tbl |
