METHOD FOR TREATMENT OF WELL WITH REMOVAL BY MEANS OF MATERIAL CAPABLE OF DECOMPOSING Russian patent published in 2018 - IPC E21B43/267 C09K8/80 

FIELD: oil and gas industry.

SUBSTANCE: method of fracturing and removal with degradable material comprising the steps: injection of wellbore treatment fluid into the well to enter the multi-layer formation and propagate the fracturing in the formation layer, injecting aqueous suspension containing fibers of insoluble material which is capable of decomposing in the solid phase for forming a plug from compacted fibres and isolating the hydraulic fracture from the well, where the decomposed material is present in the suspension at a concentration of at least 4.8 g/l (40 lbs/1000 gallons), and the liquid phase of suspension comprises a polymeric thickener, a viscoelastic surfactant, an auxiliary surfactant, a rheology modifier, a polymeric resistance reducing agent, a drag reducing surfactant, a polymeric resistance reduction enhancer, a monodimensional resistance reduction amplifier, an aqueous brine, or a combination thereof, or a mixture thereof, by means of the plug leading from the previous hydraulic fracturing, injecting the wellbore treatment fluid into the well to propagate the next hydraulic fracturing in another formation layer, and decomposition of decomposable material to remove the plug. The invention has been developed in the dependent claims.

EFFECT: increased treatment efficiency.

10 cl, 8 ex, 3 tbl, 13 dwg