UDC 550.34 |

G. Prodayvoda, Dr. Sci., Prof., Geological FacultyTaras Shevchenko National University of Kyiv90 Vasylkivska Str., Kyiv, 03022 Ukraine E-mail: prod@univ.kiev.ua S. Vyzhva, Dr. Sci., Prof., Geological FacultyTaras Shevchenko National University of Kyiv90 Vasylkivska Str., Kyiv, 03022 Ukraine E-mail: vyzhva_s@ukr.net, P. Kuzmenko, PhD, Assistant, Geological FacultyTaras Shevchenko National University of Kyiv90 Vasylkivska Str., Kyiv, 03022 Ukraine E-mail: pavlokn@ukr.net A. Vyzhva, postgraduate student,Geological FacultyTaras Shevchenko National University of Kyiv90 Vasylkivska Str., Kyiv, 03022 Ukraine E-mail: motomustanger@ukr.net |

CALCULATION OF SEDIMENTARY DEPOSITS ELASTIC CONSTANTS |

IN TRICLINIC APPROXIMATION ACCORDING TO VSP DATA |

(Reviewed by the editorial board member O. Menshov) This article attempts to define a complete component set of elastic constants tensor matrix in triclinic symmetry approximation andto evaluate the nature of seismic waves azimuthal anisotropy using field seismic surveys data. Elastic constants are determined by inverting the indicatrixes of radial and phase velocities with different polarization. Symmetry group of sedimentary strata is defined using acoustic tensor and elastic constants tensor. The basis of the standard acoustic coordinate system was the three right mutually orthogonal vectors of the acoustic tensor. Fedorov method is used for approximation of the elastic constants tensor to transverselyisotropic medium, which provides not only a quantitative assessment of elastic constants matrix components but also allows us to estimate the deviation degree of real anisotropic medium elastic constants from those typical of transversely isotropic medium, thelatter being the most similar to it. |