Modelling Software for Seismic Geomechanics

High-performance computing  for geomechanical calculations  and simulations of seismic wavepropagation in three-dimensional  inhomogeneous anisotropic media,  with account for fracture influences.

The software package allows to effectively solve  complex geomechanic and seismic modeling  problems, with account for fractures, non-linear  processes, elastoplastic deformations of media,  temperature deformations and for the complex  geometry of resource reservoirs and boreholes.

It provides functionality for the calculation of effective media properties based on both user  defined media geometry and the tomographic  imaging of samples.

Precision modeling

  • Up to 5 times improved accuracy of calculations  as a result of an advanced implementation of borehole and surface seismic events numerical  modeling based on a modified method of finite  elements.
  • The underlying calculations engine uses the explicit algorythm with spectral convergence  and a user-selectable approximation order of accuracy in space.
  • To solve active and passive seismic problems  a complex mechanical input is used, which is composed from three-dimensional  anisotropic elasticity equations with account for thermoelastic effects and induced anisotropy  caused by the inhomogeneous field of the initial  geomechanic deformations.

Geomechanical computations

  • Modeling of nonlinear processes occurring in rock formations, with account for elastoplastic  deformations of the media, the apposition of layers at the boundaries of tectonic rifts  and thermal strains.
  • Geomechanical research of stress distribution  in seams in the vicinity of resource reservoirs  and drillholes, including curved and branching  holes.
  • Optional account for fracturing, array media  anisotropy and non-linear effects in the mine’s  bottom zone within computations.

Digital research of cores

Research of the effective properties of media (the creation of a virtual  laboratory to assess the mechanical characteristics of the core and the digital analysis of cores based on tomographic imaging data).

Digital research of cores
  • To evaluate the average elastic properties of porous and fractured material on a microscopic  level, it applies the effective medium theory.
  • As part of the effective medium theory a digital  model of the core is subjected to a series of virtual tests on compression and shear,  in each of which stress fields are calculated  and averaged by the core’s volume.
  • On the basis of the obtained averaged stresses  and the deformations set during testing, it computes the  effective characteristics of the core.

Calculations on a representative volumе

Numerical methods, using calculations based on a representative  volume, produce calculations of the effective moduli of rock. This allows to estimate the effective  properties of composites with arbitrary geometry.

The ability to export  the effective media

The application suite supports the ability to perform calculations based on the obtained  effective property constants of orthotropic or isotropic materials with the export of the latter  into XML and the possibility to import it back  into Fidesys for use in further calculations.

Automatic generation  of the geometry

The suite also supports the ability to automatically generate the geometry of representative volumes (periodicity cells)  of the main anisotropy types of rocks from user-defined geometric parameters.

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