| abstract |
The invention "a high-temperature and high-salt-resistant chemical bridge plug composition for wellbore and its gel, preparation method and application" belongs to the technical field of oil and gas field development. The chemical bridge plug composition includes: acrylamide and a modified monomer, an organic crosslinking agent, polyacrylamide, and an initiator; the modified monomer is selected from 2-acrylamide-2-methylpropanesulfonic acid, Methyl methacrylate, butyl acrylate; preferably 2-acrylamide-2-methylpropanesulfonic acid. The chemical bridge plug gel produced by the cross-linking reaction and the double reaction of the polymerization reaction is synergistically generated between the compositions after adding water through a reasonable proportion, and has the advantages of high strength, controllable gel formation time and good temperature resistance. |