METHOD OF OIL POOL DEVELOPMENT Russian patent published in 2002 - IPC

FIELD: oil producing industry; applicable in development of oil pool with nonuniform bedding and carbonate reservoir. SUBSTANCE: method drilling of horizontal wellbores from vertical or inclined wellbores of producing wells to tap producing formation. Oil is recovered through producing wells. Well is cased down to roof of producing formation. Two open horizontal wellbores located in producing formation are drilled, one above the other, in same vertical plane open horizontal wellbore is drilled in interlayer with higher permeability. Upper open horizontal wellbore is drilled in interlayer with lower permeability. Lower open horizontal wellbore is filled with viscoelastic composition. Then, upper open horizontal wellbore is filled with solution of acid with density higher than that of formatting water. Substances arte allowed to stand for process realization. Injection of acid solution into upper open horizontal wellbore is repeated. Substance is allowed to stand for process realization. Well is washed with oil and completed. EFFECT: increased oil recovery due to fuller operation of interlayers with different permeability. 1 ex