COMPOSITION FOR ASPHALTENE DEPOSITS REMOVAL Russian patent published in 2018 - IPC C09K8/524 

FIELD: oil industry.

SUBSTANCE: invention relates to oil industry, namely to methods of removal and dissolution of asphaltene deposits (asphaltene-resin-paraffin deposits) — ARPD in the bottom-hole formation zone (BHZ), removal from the surface of deep and wellhead oilfield equipment, in reservoirs and oil-gathering reservoirs, main oil pipelines. Composition for the removal of asphaltene-resin-paraffin deposits, containing hexane, nonionic surfactant and polar non-electrolyte, contains a reagent OP-10 as a nonionic surfactant, as a polar non-electrolyte — isobutanol and additionally — sodium hydroxide — NaOH and O-xylene at the following component ratio, mass%: hexane 65.0–80.0, reagent OP-10 2.0–3.0, isobutanol 5.0–15.0, NaOH 0.08–0.12, O-xylene 10.0–20.0.

EFFECT: technical result is an increase in the dissolving power of the composition for removal of asphaltene deposits in complicated conditions, expansion of the raw material base, including with the involvement of petrochemical production waste.

1 cl, 3 ex, 3 dwg