METHOD FOR DEVELOPMENT OF RESERVOIR NON-UNIFORM BY PERMEABILITY FROM ROOF TO SOLE, SATURATED WITH OIL AND UNDERLYING WATER Russian patent published in 2022 - IPC E21B43/12 E21B43/32 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry; it can be used for the operation of reservoirs non-uniform by permeability with plantar water. The method includes the completion of the horizontal “termination” of a well in an interval of a productive reservoir by a combined structure including a part near to a roof, represented by a column cemented using centralizers, and a far part located closer to a sole, equipped with a filter. Near and far parts are separated by a cementing back-up packer. The near part is located in a low-permeable part of the reservoir, the far part is located in a high-permeable part, through which, after the development and commissioning of the well, the reservoir is operated until the maximum watering of extracted products. Further, in an interval of a buffer section, between spent and untreated parts of the horizontal “termination”, a blind packer plug is installed, selective opening is performed by perforating intervals of a non-perforated part of a wellbore and low-volume hydraulic fracturing (hereinafter – HFR) of the reservoir is sequentially carried out through them. The determination of a number of cycles or stages of low-volume HFR is made based on the length of the horizontal part of the well in the low-permeable part of the reservoir.

EFFECT: completeness of oil recovery from a reservoir non-uniform by permeability is increased, and processes of oil reserves production are controlled.

1 cl, 3 dwg