METHOD OF DEVELOPMENT OF INHOMOGENEOUS OIL FORMATION Russian patent published in 2017 - IPC E21B43/22 C09K8/575 

FIELD: oil industry.

SUBSTANCE: invention relates to oil industry, namely to change of filtration characteristics of non-uniform beds, increasing oil deposits recovery and reducing watering of producing wells with obtaining maximum effect at late stage of oil deposit development. Method of development of non-uniform oil deposit, which involves pumping to well of water suspension of wood flour and polymer, involves preliminary determination of initial specific injectivity of well, as disperse phase mixture of wood flour and polymer is used, as dispersion medium water with mineralization from 0.15 up to 300 g/l is injected, as polymer high-viscosity oxyethyl cellulose (OEC) is used, said aqueous suspension of wood flour and OEC is pumped in two volumes, first fringe of said aqueous suspension is injected until specific injectivity of well is reduced by 15–30 % of initial specific injectivity of well in following proportions, wt%: wood flour 0.3–1.5, OEC 0.001–0.5, said water with mineralization from 0.15 up to 300 g/l is the rest, then pumping of second fringe of said aqueous suspension is made until specific injectivity is reduced by 5-10% of initial specific injectivity of well in following proportions, wt%: wood flour 0.001–0.5, OEC 0.005–1.0, said water with mineralization from 0.15 up to 300 g/l is the rest, wherein said fringe is pumped in volume ratio 1:(1-7).

EFFECT: technical result is increase of efficiency of oil production due to increased coverage of bed and reducing watering of producing wells, expanded technical performances.

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