This article includes review of evolution of multistage fracturing completions for conventional oil reservesin continental Russia and focuses on attempts of the LLC"RN-Yuganskneftegaz",the one of the largestoperator company in Russia,to solve the challenge of well life extension by implementing new completiontechnologies allowing reliable means of re-fracturing on the well after several years of service as well asthe means to isolate gas or water break-through.A comparative analysis of different types of multistage fracturing completions was performed by LLC"RN-Yuganskneftegaz"with the aim to select the most suitable technology to address the above-mentionedgoals without sacrifice of time required to drill,complete and stimulate the well.As the result of the analysis the technology of the frac valves activated by single-sized dissolvable ballswas selected as a most appropriate.The successful field trial on 2 wells is described in this paper.
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