TY JOUR TI Efficiency of multi-stage hydraulic fracturing in the development of low-permeability oil reservoirs using domestically produced equipment KW low-permeability reservoirs KW multi-stage hydraulic fracturing (MSHF) KW domestically produced equipment KW import substitution KW oil recovery KW production stimulation KW hydraulic fracture KW proppant KW well flow rate KW technological sovereignty JO JOURNAL OF MONETARY ECONOMICS AND MANAGEMENT AU Gol'ceva, Y.A. AU Sidorov, I.V. PY 2026 IS 0 PB ITBO University