“…A push for development of such projects should have been the allocation of several specialized projects (including big companies -Gazpromneft (the project of The Bazhen technology center), Surgutneftegaz, Tatneft, Rosneft and LUKOIL) that allow testing approaches to technologies for the development of "dense" collectors and so-called "shale" formations, first of all, bazhenovskaya and domanic formations. These measures have played a role in the intensification of study, but in general, especially for the last group of commercially successful projects until now, including due to the uncertainty of the regulatory framework and the development of new methods for assessing reserves (Gutman et al, 2017;Kamenchukov et al, 2019). Accordingly, in light of that, estimate of the share of hard-to-extract oil deposits in Russia varies in line to different sources, in a fairly wide range (from 30% to 70%) (Prischepa et al, 2011;Yakutseni et al, 2007;Lisovsky et al, 2009;Shpurov et al, 2014;Shelepov, 2013;Muslimov, 2011), due to the lack of a unified approach to their definition, many of the parameters used for the evaluation of this share and, more significantly, the fundamentally different conditions of development of groups of reserves classified as hard-to-extract.…”