METHOD OF OIL POOL DEVELOPMENT WITH USE OF HORIZONTAL INJECTION WELLS Russian patent published in 2001 - IPC

FIELD: oil producing industry; applicable in development of oil pools drilled with vertical and horizontal wells. SUBSTANCE: horizontal wells are located crosswise on development district with mutually perpendicular arrangement of horizontal wells. Oil is withdrawn through horizontal and vertical producing wells until formation pressure is reduced by 10-25%. One of horizontal wells is used for injection of working agent. Injection is carried out up to reaching of other horizontal injection wells located square by working agent. Horizontal wells reached by working agent are used for injection of working agent under cyclic conditions with alternating injection of working agent into mutually perpendicular horizontal wells. EFFECT: increased oil recovery due to more complete coverage of formations. 1 dwg, 1 ex