METHOD OF FORMATION HYDRAULIC FRACTURING WITH WATER INFLUX ISOLATION IN PRODUCTION WELLS Russian patent published in 2015 - IPC E21B43/267 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry, in particular to the formation hydraulic fracturing. The method of the formation hydraulic fracturing with the water influx isolation in the production wells is characterised in that to the horizontal section of the well the tubing is run with the bridge plug installation, the plug id drilled below the required depth of the formation hydraulic fracturing, tubing is raised, tubing with packer is run, and it is installed above the well treatment section, the killing liquid is replaced by the linear gel of hydrocarbons base, vol %: diesel fuel - 99.0-99.5, helant HGG-77 - 0.3-0.5, activator HGA-10 - 0.2-0.5, the cross-linked gel cushion is pumped to the pay under pressure exceeding the hydraulic fracture pressure of the rocks, and by monitoring of the fluid flowrate to create uniform water isolating screen with composition in vol %: HGG-77 - 0.5, activator HGA-10 - 0.5; diesel fuel - 89, ethyl silicate "ЭТС"-40 - 10, mini hydraulic fracturing of the formation is performed with use of proppant carrier liquid, vol %: helant HGG-77 - 0.8, activator HGA-10 - 0,8, diesel fuel - 93.4, silicone liquid "ГКЖ-11Н" - 5, and gaize as proppant pre-saturated by silicone liquid "ГКЖ-11Н", at proppant concentration in said proppant carrier liquid 200 kg/m³, the proppant carrier liquid is pumped to the formation by the diesel fuel, main formation hydraulic fracturing is performed using the proppant carrier liquid, vol %: helant HGG-77 - 0.5, activator HGA-10 - 0.5, diesel fuel - 89, "ЭТС"-40 - 10, and gaize as proppant pre-saturated by ethyl silicate "ЭТС"-40, at the proppant concentration in the said proppant carrier liquid 1200 kg/m³, with further pumping to the formation by the diesel fuel.

EFFECT: control of the relative permeability in the crack is ensured upon presence of the active base and/or roof waters.

4 dwg, 3 ex