Petrophysic studies in atmospheric and reservoir conditions as necessary construction for monitoring trends of changes of physical properties of reservoir rocks
S. Vyzhva, I. Bezrodna, O. Petrokushyn and I. Onushchyk
Event name: 11th International Conference on Monitoring of Geological Processes and Ecological Condition of the Environment
Session: Poster Session
Publication date: 19 March 2018
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This paper presents the results of qualitative and quantitative analysis of the trends in the physical properties of core samples presented by sandstone of the Runivshchina Zone under varying pressure conditions. The authors analyzed the velocity of the longitudinal wave, specific electrical resistance, open porosity factor, which were measured in the Petrophysical Laboratory of the Institute of Geology of Taras Shevchenko National University of Kyiv (Ukraine). The authors have shown that such studies can be considered as a component of the monitoring of petrophysical data (factor of porosity, P-wave velocity, specific electrical resistance and formation resistivity factor) for assessing the nature of reservoir rocks. A close linear connection between the factor of porosity in reservoir and atmospheric conditions was experimentally established, the dependences of the formation resistivity factor on the factor of porosity were approximated by the power functions and dependences of P-wave velocity on the factor of porosity by linear functions. By comparing the relationships between petrophysical parameters in reservoir and atmospheric conditions, it was established that for the more precise creation of a petrophysical model, it is necessary to use the values of parameters in reservoir conditions, since they are more reliable (correlation coefficients for reservoir conditions are greater than for atmospheric conditions). These dependencies with the determined coefficient of reliability can be used within the limits of Runivshchyna Zone and zones with similar petrophysical and other parameters of the productive strata of adjacent areas to assess the change in reservoir properties of reservoir rocks based on the data of laboratory researches of the core during the development and monitoring of deposits.