Petrophysical studies are one of the primary sources of information on the presence and distribution of hydrocarbons in the subsoil. These studies involve an integrated analysis of core samples taken during the drilling process, and survey of geological and geophysical properties of rocks near the wellbore performed with the use of special instruments designed to measure natural and artificial physical fields (well logging operations). 

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Acquired data is used to determine lithology of the borehole environment, identify productive intervals and define their reservoir properties: porosity, permeability, hydrocarbon charge, etc.

The STC specialists have the task of choosing the optimal range of well surveys, interpreting survey results, and developing petrophysical models of productive reservoirs. Petrophysical parameters, along with seismic/well test and other surveys, form the basis for subsequent geological modeling of a petroleum reservoir and estimation of its reserves, as well as help identify the prevalent trends in spatial distribution of reservoir properties.

Seeking to ensure continuous improvement of field development efficiency, the STC specialists work on increasing information value of petrophysical survey methods. This involves the use of innovative well logging techniques, optimization of standard well logging technologies, and improvement of geophysical data interpretation methods. Introduction of new technologies helps develop more accurate geological models that are later used for selecting specific oil production process solutions.