WELL STRUCTURE AND METHOD OF MULTIPAY OIL POOL DEVELOPMENT Russian patent published in 2009 - IPC E21B43/00 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil-producing industry and is intended for oil production. For this purpose at later stage of more permeable layer watering in producing wells with higher watering of this layer produce, operational column is perforated in interval of less permeable layer, less permeable layer is involved in development by method of intrawell bypass of associated water from more permeable layer into less permeable layer, and settled oil is periodically or continuously withdrawn from these wells. Device for method realisation includes column of pumping pipes (PP), comprising lower and upper PP with holes. Lower PP is installed between dynamic level of fluid in well and upper producing layer. Upper PP with holes is located below dynamic level of fluid in well and higher than lower PP with holes. In cavity of PP column higher than lower PP with holes, plug is installed. On bottom PP with holes in interval of holes there are separator of liquid flows and separator-coalescer.

EFFECT: efficient separation of oil from associated water in producing oil well of high-permeability highly watered layer, reduction of associated water withdrawal with oil produced from high-permeability layer, reduction of well drilling volume by low-permeability layer, increase of current oil withdrawal from low-permeability layer and acceleration of its resources work-out, reduction of operational expenses, transportation, preparation and pumping of associated water bypassed into low-permeability layer, on day surface.

9 cl, 1 dwg, 4 ex