METHOD OF OIL DEPOSIT DEVELOPMENT Russian patent published in 2012 - IPC E21B43/20 

FIELD: gas and oil production.

SUBSTANCE: in oil deposit production, water intake wells are drilled in water-bearing bed, vertical injection and horizontal production wells are drilled in production bed top at equal distance from injection wells, water is produced from water-bearing beds and pumped from water intake wells to injection wells, forward cyclic water injection through injection wells is performed at pressure in injection well bottomhole higher than fracture exposure pressure, with bed pressure in production zone maintained by compensating fluid production with water injection, and oil production through production wells. According to invention, zones with productive bed are pointed out, where bed bottom or impermeable bed substrate feature increased range of gamma-ray logging over 1.5 mcR/h and neutron gamma-ray logging over 2 conventional units. In the selected zones, injection pool of wells is divided into 2 groups. First group includes injection wells exposing oil-saturated interval of production bed with compact rock substrate. Second group includes injection wells exposing oil-saturated interval of production bed with water-bearing header substrate. In the first group of injection wells, lower bed part is perforated up for 3-5 m from the bottom. In the second group of injection wells, perforation is performed in 1-5 m below the path of horizontal production well.

EFFECT: increased efficiency of oil displacement, higher speed and rate of oil production.

1 ex, 2 dwg