Assessment of Rheological Properties of Bazhen Series Reservoirs by Thermobaric Test Data
L. A. NAZAROVA1,2, L. A. NAZAROV1,3, N. A. GOLIKOV4
1Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia 2Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090 Russia 3Novosibirsk State Technical University, pr. K. Marksa 20, Novosibirsk, 630073 Russia 4Trofimuk Institute of Petroleum Geology and Geophysics Siberian Branch, Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090 Russia
Keywords: порода-коллектор, баженовская свита, эксперимент, напряжение, температура, модуль Юнга, вязкость, коэффициент линейного расширения, обратная задача, reservoir rocks, Bazhen series, experiment, stress, temperature, Young modulus, viscosity, linear expansion coefficient, inverse problem
Abstract
The performed thermobaric tests of cylindrical bazhenite specimens consisted in recording of time variation in height of the specimens, h(t), under constant axial loading at varied temperature T. The authors demonstrate that under rapid increase/decrease in T deformation process obeys the thermoelastic law and calculate the coefficient of linear temperature expansion. Under constant increased temperature, the process of deformation is described using the viscoelastic Voigt model. The authors formulate and solve inverse problems on elastic moduli and viscosity of rocks by the data of h(t).
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