METHOD FOR DEVELOPMENT OF MULTI-PAY OIL DEPOSIT (VERSIONS) Russian patent published in 2016 - IPC E21B43/14 E21B43/20 

FIELD: oil industry.

SUBSTANCE: invention relates to methods of development of multilayer deposit with displacement of water. Method comprises downhole pumping of water from water-bearing formation to productive formation in natural mode due to energy of water-bearing formation via injection wells and oil extraction from productive formation through production wells. Injection wells between beds are equipped with seats, inside which there are installed valves allowing water from bottom to top with water-bearing formation location below oil-bearing or from top to bottom with water-bearing formation above oil. When water-bearing formation is below oil-bearing valve is made with buoyancy in pumped water of less than zero, providing for overflow of water at pressure drop above selected. When water-bearing formation is above oil-bearing valve is made with buoyancy in pumped water of greater than zero, providing for overflow of water at pressure drop above selected.

EFFECT: technical result consists in improvement of efficiency of development of multi-pay oil deposit.

2 cl, 5 dwg