Development of complex reservoirs characterized by poroelastic properties heterogeneity is a special challenge of Rosneft Oil Company. Currently, the company uses a wide range of laboratory methods for studying the deformation and strength properties of rocks. The results of these researches contribute to increasing the efficiency of scientific support for oil and gas fields the development. Many operations for determining the mechanical properties of rocks, such as defining strength limits in various conditions, became a routine. The most general and informative in practice is a comprehensive method of rock strength certificates, which provides the necessary minimum of data on the strength and deformation properties of rocks suitable for further geomechanical and hydrodynamic simulations. However, determination of one of the most important parameters used both in simulating and initial data calculating for geomechanical laboratory investigations (the poroelasticity (Biot) coefficient) requires series of long-term separate experiments. In order to obtain the necessary data it is necessary to determine the deformation characteristics of the core material in various load distribution conditions, which is associated with the complication of the hardware part of the experiment.
The Rosneft Oil Company pays great attention to the scientific and methodological support of digital modeling, as well as reducing associated costs. The article presents the method for calculating the Biot coefficient developed by Rosneft. The initial data for the calculation are the results of determining the strength properties of the core, for example, as part of the construction of rock strength passports. This allows you to significantly reduce the cost of laboratory research.
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