METHOD OF INHIBITING HYDROCARBON FORMATION Russian patent published in 2014 - IPC E21B37/06 C09K8/52 

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises injection of polymer water composition into near-well zone or into pipeline length. Said composition comprises water solution of polymer from the group including: copolymer or pyrrolidone or caprolactam, thermo polymer based on N-vinyl-2-pyrrolidone, polyacrylamide, dimethylaminoethyl methacrylate, hydroxyethylcellulose, polyvinyl pyrrolidone, hydrolysed polyacrilonitrole, polypropylene glycol, polyoxipropylenepolyol, polyvinyl carboxylate, polyacrylate, polyvinyl caprolactam, acrylamidomethyl propansulfonate, polyacrylamide, hypan, polyoxipro in polymer oil from the group including: polyacrylamide, carboxymethyl cellulose, oxymethyl cellulose ether, polymetacrylate, polyvinyl acetate or polyvinyl alcohol or their copolymers and, additionally, carbamide formaldehyde concentrate CFC and waterproofing additive at the following ratio of components in wt %: said water solution or emulsion - 0.05-5.0, CFC - 0.1-5.0, waterproofing additive - 0.1-5.0, water making the rest. Note here that prior to injecting said composition, CFC oil ring is injected in amount of 0.1-5.0 wt % of the composition bulk and held for at least 3-5 h. Invention is developed in dependent claim.

EFFECT: higher inhibiting capacity.

2 cl, 19 ex, 2 tbl, 1 dwg