The article presents the results of modeling the operation of a functioning horizontal oil well with a performed ball multistage hydraulic fracturing in conditions of a low-productivity formation. The main objective of the study was to assess the effect of seats on well productivity during flowing mode and subsequent transfer to a mechanized operation mode using an electric centrifugal pump in a periodic mode. To achieve the set goal, two computer models were created using the OLGA software package based on the actual well operation parameters during flowing and mechanized operation modes. A series of calculations were performed for various horizon configurations such as: without seats, with seats of the original diameter and with «contaminated» seats (reduced flow area). In addition, the following work presents an economic assessment of the efficiency of drilling out seats due to an increase in the average daily oil flow rate of the well, as well as due to a decrease in the effect of local resistances on well productivity. The results of this study are an important step in determining the efficiency of using the considered technology for well completion with ball multistage hydraulic fracturing in the development of unconventional low-permeability oil and gas reservoirs.
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