In recent years, Rosneft Oil Company has been increasingly involved in the development and operation of deposits that are characterized by relatively unfavorable geological conditions and have low reservoir permeability. One of the key processes in the development of such deposits is the effective hydraulic fracturing, the quality of which is influenced by the accuracy of the design based on reliable laboratory results to determine the deformation and strength properties of the composing rocks. Currently, the laboratory complex of Rosneft Oil Company has many methods for solving the problem of making a rock strength passport, however, there is no single generally accepted approach that ensures the reliability of the studies carried out. As part of this task, employees of the Department of Integrated Core Research of NK Rosneft-NTC LLC, together with Rosneft Oil Company, analyzed all possible approaches for conducting deformation and strength studies, followed by the construction of a universal envelope of the rock strength passport. Rosneft Oil Company pays great attention to the scientific and methodological support of digital modeling and design, as well as reducing the costs associated with it. This article proposes a unified author's methodology that enables to increase the reliability and unambiguity of the obtained laboratory results with an automated algorithm for selecting the envelope of the rock strength passport.
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