COMPOUND FOR CONTROL OF DEVELOPMENT OF OIL DEPOSITS (VERSIONS) Russian patent published in 2011 - IPC C09K8/588 

FIELD: oil and gas industry.

SUBSTANCE: invention can be used for isolation of water influx to oil wells, as well as for control of capacity profile of injection wells, for formation treatment, for elimination of leakage of production casings, space behind columns and elimination of sand problem. The first version of compound for control of development of oil deposits includes water solution of anionic polymer, salt of polyvalent metal, at least one SAS as surface active substance, mineralised waste water or diluted formation water with mineral content of up to 30 g/l as water and additionally carbamide-formaldehyde concentrate or carbamide-formaldehyde resin on its basis and waterproofing agent at the following component ratio, wt %: anionic water-soluble polymer 0.15-5.0; at least one SAS 0.1-20.0; carbamide-formaldehyde concentrate or carbamide-formaldehyde resin on its basis 0.1-60.0; waterproofing agent 0.1-10.0; salt of polyvalent metal 0.005-0.30; water is the rest. The second version of compound includes anionic polymer in the form of emulsion in oil, at least one SAS as surface active substance, mineralised waste water or diluted formation water with mineral content of up to 30 g/l as water and additionally carbamide-formaldehyde concentrate or carbamide-formaldehyde resin on its basis and waterproofing agent at the following component ratio, wt %: at least one SAS 0.1-20.0; carbamide-formaldehyde concentrate or carbamide-formaldehyde resin on its basis 0.1-60.0; waterproofing agent 0.1-10.0; salt of polyvalent metal 0.005-0.30; water is the rest. In addition, compounds as per versions contain non-organic or organic acid or mixture of acids in quantity of 0.1-0.5 wt %, gasifier, in wt %: ammonium chloride 0.32-7.0 and sodium nitrite 0.41-8.96, lightweight additive - aluminosilicate hollow microspheres in quantity of 0.5-10.0 wt % and inhibitor of corrosion or bacterial corrosion, or salt deposits in quantity of 0.1-3.0 wt %.

EFFECT: improving rheological properties of compound, which resist high filtration resistances, improving washing capacity of compound and oil-sweeping capacity of pumped compositions owing to changing rock wettability, and namely increasing hydrophobisation of rock surface of formation for the purpose of connection to development of stagnation and low-drainable zones of formation.

10 cl, 5 tbl