COMPOSITION FOR TREATMENT OF BOTTOM-HOLE ZONE OF FORMATION OF TERRIGENOUS RESERVOIR AND METHOD OF TREATMENT OF BOTTOM-HOLE ZONE OF FORMATION OF TERRIGENOUS RESERVOIR Russian patent published in 2024 - IPC C09K8/74 E21B43/27 

FIELD: oil and gas industry.

SUBSTANCE: composition for treatment of bottomhole formation zone of terrigenous reservoir contains, wt.%: ammonium fluoride peroxosolvate 1.0–10.0; nonionic and/or anionic surfactant containing one or more nitrogen atoms, 0.5–3.0; ammonium salt 1.0–15.0; water—balance. Ammonium salt used is at least one substance from: ammonium citrate, ammonium nitrate, ammonium sulphate, and content of stabilized hydrogen peroxide in ammonium fluoride peroxosolvate is not less than 45 wt.%. Method of treatment of bottomhole formation zone of terrigenous reservoir includes treatment with the above composition and curing of the well for reaction with the specified composition during 4–48 hours without further removal of reaction products.

EFFECT: increase in the permeability recovery factor of the porous space of the bottomhole formation zone of the terrigenous reservoir, increase in the well productivity, increased stability of the method of treatment of the bottomhole formation zone of the terrigenous reservoir in the range of formation temperatures above 50 °C.

10 cl, 2 tbl, 3 ex