METHOD OF DEVELOPING OIL POOL IN FRACTURED-POROUS CARBONATE BASINS Russian patent published in 2012 - IPC E21B43/20 E21B43/30 

FIELD: oil-and-gas production.

SUBSTANCE: proposed method comprises drilling production and injection wells, injecting displacement fluid via injection wells and withdrawing oil via production wells. Note here that oil pool is developed by pattern-water flooding system with arranging production and injection wells so that, at least, three lines and/or orbits of injection wells are located between production wells. Production wells to be located nearby injection wells are drilled vertically while production wells of next rows and/or orbits are drilled horizontally. Note here that one horizontal production well substitutes for, at least, two vertical production wells in well pattern. Polymer solution is injected into production wells of first row after their drowning by more than 50%.

EFFECT: higher efficiency, extended period of water-free production of oil.

2 cl, 1 dwg