Rock physics modelling of viscoelastic properties of fractured reservoir rocks incorporating Krauklis waveстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 3 октября 2019 г.
Аннотация:A method is elaborated for calculating the effective viscoelastic properties of anisotropic fractured rocks. The method is based on the rock physics modelling allowing one to consider components having viscoelastic moduli. The method incorporates the effect of low-velocity and highly dispersive Krauklis waves arising in thin fractures. We introduce the so-called ‘Krauklis substance’ and determine its viscoelastic moduli from the known velocity of Krauklis wave. The Krauklis substance is pure elastic in compression and viscoelastic in shear with zero real part of the shear modulus and non-zero imaginary part of the modulus. Then, we model a rock having a set of aligned fractures as a two-component medium considering the Krauklis substance like a component filling the fractures. We demonstrate an anisotropic behaviour of attenuation and velocity dispersion of elastic waves in the seismic frequency range for two models of carbonate rock having a set of aligned fractures filled with fluids of different viscosity (brine and oil).