FIELD: oil and gas production, particularly troublesome zone isolation inside well, namely well drilling and repair.
SUBSTANCE: method involves injecting water and cement based plugging solution in theft zone via production string; hardening the plugging solution; supplying acid solution in the theft zone; lifting production string for design height; injecting organic-based plugging solution in the theft zone; forcing the organic-based plugging solution into theft zone. The organic-based plugging solution comprises formaldehyde tar and acid hardener. The design height is calculated from a given formula.
EFFECT: increased efficiency of theft zone isolation and improved operational safety.
2 cl, 1 tbl
| Title | Year | Author | Number |
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RU2349731C2 |
