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Summary This article proposes one of the methods of process operation optimization for hydraulic fracturing (HF) in wells with horizontal completion. The aim of the approach is to increase well productivity within the target intervals, reduction of hydraulic fracturing time. Results of analytical work on assessment of alternative technologies applied contributed to search and test of the new approach, as a result of this analytical work the conditions for various technological solutions for stimulation of wells with horizontal completion were developed and advanced technologies, methods, procedures of selective reservoir stimulation were searched. One of the methods studied was determined as the potential method for operational tests. This method was tested in 18 wells of operating stock for various geological and technical conditions (various diameter and type of liner completion). As a result of works executed, the performance targets were achieved: planned process efficiency, labor content was reduced, and hydraulic fracturing time was optimized. Taking into account availability of positive results of technology application at the company's fields, it was recommended for distribution at the similar targets, including the possibility of testing in wells that are put into production from drilling with HF.

Achimov sequence is characterized by high heterogeneity and low reservoir properties, that makes it impossible economically profitable field development without hydraulic fracturing and usage reservoir pressure maintenance systems. The research aims to develop recommendations for regulating the operations of injection wells, in conditions of waterflood-induced fracture formation. The recommendations can be used to further regulate the waterflooding system for the conditions of Achimov sequence.