COMPOSITION FOR INCREASE OF OIL RECOVERY OF FORMATIONS (VERSIONS) Russian patent published in 2015 - IPC C09K8/584 C09K8/74 

FIELD: oil-and-gas industry.

SUBSTANCE: composition for increase of oil recovery of formations containing non-ionogenic and anionic surface-active agents - NSAA and ASAA, boric acid and water, it contains as a named SAA the complex SAA Neftenol VVD, or mix of NSAA AF9-12, or NP-40, or NP-50 and ASAA of volgonat or a sulphanole, or NPS-6 in the ratio 2:1 and in addition contains the technical or distilled glycerin at the following ratio of components, wt %: complex SAA or mix of NSAA and ASAA 1.0-4.0, boric acid 1.0-15.0, glycerin 10.0-90.0, water - the rest. According to another version the named composition as SAA the named SAA complex SAA Neftenol VVD, or the mix of NSAA AF9-12, or NP-40, or NP-50 and ASAA of volgonat or a sulphanole, or NPS-6 in the ratio 2:1 and in addition - the technical or distilled glycerin and carbamide at the following ratio of components, wt %: complex SAA or mix of NSAA and ASAA 1.0-4.0, boric acid 1.0-15.0, glycerin 10.0-90.0, carbamide 5.0-10.0, water - the rest.

EFFECT: decrease of freezing temperature, increase of high-viscosity oil displacement efficiency high-viscosity oil, possibility of use of the composition both at high formation temperature or both at thermal influence, and at low formation temperature.

2 cl, 4 dwg, 2 tbl, 8 ex