FIELD: chemistry.
SUBSTANCE: invention can be used to dissolve and remove asphalt-resin-paraffin deposits (ARPD) from the surface of the downhole equipment, in reservoirs and oil-gathering reservoirs. The solvent of asphalt-resin-paraffin deposits contains aromatic and aliphatic hydrocarbon solvents and a nonionic surfactant, which is a depressant-dispersing additive (DDA) containing the "Yalan-E2" emulsifier and an ethylene-alpha-olefin copolymer with the molecular weight of 500 to 100,000 or polyalkyl acrylate, with the following ratio of components, wt %: solvents - 97-98, depressant-dispersing additive - 2-3.
EFFECT: increasing the detergent, solvent, dispersing capacity of the solvent.
3 cl, 1 tbl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
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|
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|
RU2546158C2 |
