METHOD OF DEVELOPMENT BY MULTIPLE HYDRAULIC FRACTURING OF OIL DEPOSIT WITH LOW PERMEABILITY Russian patent published in 2015 - IPC E21B43/26 

FIELD: oil and gas industry.

SUBSTANCE: method comprises designing and drilling of the horizontal wells in deposit previously developed by vertical and/or directed wells, multiple hydraulic fracturing in the horizontal wells, and further product recovery. As per geophysical surveys in wells the oil saturated deposit with nonuniform permeability is determined, its permeability varies through depth by at least ten times. Average permeability of the deposit thought volume does not exceed 2 mD, and thickness of each interlayer of the tight rocks in the deposit does not exceed 2 m. In the most permeable undelayer with thickness at least 1 m the horizontal well is designed and drilled, at that the horizontal wellbore is drilled using the bottom drill module and measuring the geophysical parameters during drilling to correct the wellbore path for its drilling through the most permeable section. The horizontal bore assembly is made with possibility of multiple hydraulic fracturing with number of stages from 5 to 30 and distance between stages from 10 to 50 m.

EFFECT: increased surface efficiency and increased oil recovery of the deposit.

1 dwg, 3 ex