METHOD OF HIGH-VISCOSITY OIL POOL DEVELOPMENT Russian patent published in 2008 - IPC E21B43/24 

FIELD: mining.

SUBSTANCE: method involves drilling vertical injection wells and horizontal producing wells, injection of working agent via injection wells and oil withdrawal via production wells. Horizontal hole of production well is arranged 1.5-2.5 m above the productive stratum bottom and is perforated. Bottom of vertical injection well is arranged 3.5-4.5 m above the horizontal hole of producing well and is perforated at 0.5-1.5 m interval from the bottom. The distance between vertical injection well and the vertical hole of producing well is longer than 2/3 of horizontal producing well length up to the end of horizontal hole. Working agent is steam alternating with air.

EFFECT: increased oil yield of a pool.

1 ex, 1 dwg