METHOD FOR DEVELOPMENT OF EXPLORED OIL DEPOSIT Russian patent published in 2016 - IPC E21B43/16 E21B47/00 

FIELD: oil and gas industry.

SUBSTANCE: invention can be used in development of low-explored oil deposit. During development of low-explored oil deposit drilling is performed with coarse grid of wells. Also, product is extracted through production wells, pumping of working agent through injection wells is performed. In drilled well seismic survey is carried out by non-longitudinal vertical seismic profiling with determination of zone of amplitudes of energy of reflected waves less than 80 standard units. Defined zone is accepted as shale-out zone in terrigenous reservoirs-non-reservoir. Further, transition zone is determined, having values of amplitudes of energy of reflected waves less than 80 to 120 standard units and zone of highly efficient collector with values of amplitudes of energy of reflected waves of more than 120 standard units. Method includes selecting a line separating transition zone and zone of highly efficient collector, determining thickness of oil-saturated formations in zone of highly efficient collector. Method then includes sealing existing grid of producers by drilling wells with horizontal bores in area of highly efficient collector with location in water-oil zone with oil-saturated strata of more than 3.5 m and pure oil zone with oil-saturated strata of more than 1.5 m. Horizontal boreholes are arranged opposite to line dividing transition zone and zone of highly efficient collector, and in parallel to section of said line opposite to which there is a well with horizontal shaft.

EFFECT: increased oil output.

1 cl, 1 dwg, 1 ex