DEVELOPMENT OF OIL DEPOSITS BY WELLS COMMUNICATED VIA PRODUCTIVE STRATUM Russian patent published in 2014 - IPC E21B43/18 

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises construction of horizontal wells and their isolation to horizontal section and vertical wells with face below seam bottom with extraction of product from vertical well. Proposed method consists in that vertical wells are infill drilled for geological research to define formation properties, oil properties and formation critical pressure. Set of wells arranged around the perimeter of developed section is selected. Similar horizontal wells are drilled from vertical wells of this set and directed clockwise or counter clockwise toward near well of said set to surround this well and its horizontal shaft. Distance between shafts foes not exceed tem meters to provide for hydrodynamic communication. Seam local hydraulic fracture is made in the case of its absence. Every vertical well is equipped with the pump lowered on pipe string below stratum surface and point of communication with appropriate horizontal wells to compose tube space. Extraction of products is effected with decrease in seam hydrodynamic level not lower than critical pressure and with gas extraction from tube space at the mouth with vacuum pump.

EFFECT: higher yield.

1 ex, 2 dwg