Development of an approach for hydraulic fracturing operations and a decision-making methodology in the Sredne-Nazymskoye field

Summary The object of the research is the Upper Jurassic deposits YuK-01 of the Sredne-Nazym field. The main features of the Yak-01 Upper Jurassic deposits are the complexity of the structure of the deposits, high heterogeneity of properties along the section, lateral and ultra-low matrix permeability. Currently, it remains relevant to determine the approach to the development of hydraulic fracturing designs in the field. The main difficulty is the lack of research, which makes it difficult to find solutions at the design and execution stages. An incomplete set of well logging leads to the impossibility of building a correlation between well flow rates and hydraulic fracturing designs. At the initial stage of development, vertical wells were completed with hydraulic fracturing using a "standard" design. “Standart” design is an injection schedule of 30 tons of proppant with a constant increase in the concentration of proppant (hereinafter CSP), injected onto a cross-linked gel with a flow rate of 3.5–4.5 m3/min, which limited the possibility of changing other technological parameters’ hydraulic fracturing, such as: volume and viscosity of the liquid; the volume of the buffer stage; mass and concentration of proppant, etc. This article presents the developed approach to the design of hydraulic fracturing schedules in the Sredne-Nazymskoye field and the results of its application. Additional attention is paid to highlighting the process of developing hydraulic fracturing schedules, as a result of which the proposed approach was developed.