PROCEDURE FOR DEVELOPMENT OF NON-UNIFORM OIL RESERVOIR Russian patent published in 2010 - IPC E21B43/22 C09K8/88 

FIELD: oil and gas production.

SUBSTANCE: according to procedure of development of non-uniform oil reservoir consisting in successive pumping two fringes into reservoir, first fringe corresponds to reverse emulsion and contains, wt %: oil soluble surface active substance SAS or mixture of oil-soluble SAS 1.0-20.0, silicon containing substance or mixture of silicon containing substances 0.5-20.0, water absorbing polymer 0.1-5.0, hydrophobic additive 0.1-5.0, water or water 1-10 % solution of calcium chloride - the rest, while the second fringe corresponds to water solution of water-soluble polymer acidated to pH 1-3 and contains wt %: water soluble polymer 0.01-5.0, SAS or mixture of SAS 0.1-5.0, salt of multivalent metal 0.005-0.30, water - the rest.

EFFECT: creating increased filtration resistance in porous medium, increased oil displacing capacity of pumped composition due to change of wettability of formation, particularly due to increased hydro-phobisation of surface of reservoir rock resulting in involving dead and weakly drained zones of reservoir into development.

3 cl, 6 tbl, 5 ex