METHOD OF OIL POOL DEVELOPMENT Russian patent published in 2009 - IPC E21B43/22 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil industry and may be used in development of oil pools, starting from early stage, which are characterised by non-uniform reservoirs of different nature, in particular, zone non-uniform reservoirs, reservoirs that have layers of different permeability or crack-porous reservoirs. Method comprises pumping of working substance into pumping well, withdrawal of produce from producing well, which is analyzed for ratio of oil and water. If content if the latter in produce of producing well is at least 70%, composition that contains dry acid " СК-Б " and neutralising solution of urea in fresh water with density of 1.05-1.2 kg/m³ at the following ratio of components in mentioned composition, wt %: dry acid "СК-Б" - 5-9, urea solution - 20-30, water - the rest, is pumped into producing layer with temperature of 20-40°C via pumping well, with its capacity of at least 0.6 m³/hr, and then via producing well.

EFFECT: higher efficiency of development cue to expansion of pool coverage in area and thickness of producing layer with reduction of time and financial expenses.

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