From full-wave modeling of complex structures to pre-stack depth migration
Application allows assigning different seismic acquisition geometries, numerical model building of complex seismic sections and modeling propagation of seismic waves in heterogeneous medium for the scalar, acoustic, elastic and elastic anisotropic wave equations.
Algorithms use fast and accurate computational scheme based on the finite difference method, which allows effective modeling of arbitrarily complex geological medium, including the combination of solid and liquid state bodies.
Obtained wave fields can be processed, directly within the software, to obtain seismic images with the help of different modifications of the time and depth migration.
The software package Tesseral 2D is intended for the interactive analysis and examination of depth-velocity models and it easy fits into the survey planning, processing and interpretation of seismic data.
It is widely used as an educational tool in the study of wavefield propagation phenomena, survey planning, processing and interpretation of seismic data.
The following software variants are available: Windows Standalone, Windows Network and Linux Cluster.
Full wave modeling & ray-tracing for oil and gas fields
Tesseral Pro is a new software implementation based on the Tesseral 2D package. It includes additional tools such as ray tracing and it is intended to be used for the interactive analysis and examination of depth-velocity models of oil and gas fields by using geological - geophysical data bases.
The software allows creating depth velocity models from well log data, maps of geological surfaces, 2D and 3D seismic velocity models, for the calculation of synthetic data from 2D built models and as well as the preparation of the 2.5D calculation assignment.
Tesseral Pro enables the creation of thin-layered models capable of high precision and modeling feasibility. Along with well log data, the user can enter additional data such as: well's coordinates and inclinometry, stratigraphic arrangements, fault information, horizon maps etc.
WYSIWYG approach enables combining maps, cross-sections, 2D and 3D drawings, multi-parameter models, seismic cross-sections and cubes, pictures and text strings to create high quality plots. Overlay and controlled transparency of fields is supported. Composite documents can be printed or exported in multiple file formats.
Multiprocessor PCs and servers.
Parallel computing on multiple Windows PCs using network version and on computer clusters under Linux or Windows.
Computing acceleration by general-purpose graphic units (GPU) is provided as option for 2D-2C, 2.5D-3C and 3D-3C modeling.
In the 3D-3C case a wavefield distibution among multiple computer nodes and GPUs makes it possible to solve big problems for wich single computer memory is insuficient.
For complex geology the reasonable simulation time is provided by GPUs with 25-50-fold speedup over a similar serial program.
Modeling of the 3D seismic wavefield propagation effects
In contrast to the 2D modeling, waves in 2.5D modeling propagate in a 3D medium and are described with 3D equations. In this case, the dynamic of the wavefield is preserved and creates the possibility to model 3D-3C areal gathers for surface seismic and VSP.
2.5D-3C modeling enables to specify true elastic model; consider the thin-layering effects (quasi-anisotropy, dispersion and dependence of wave propagation velocity on frequency), fracturing and anisotropy.
2.5D-3C modeling allows considering complex geological conditions, but in contrast with the full 3D modeling, it requires some simplification of the 3D medium model: the medium parameters are assumed to be constant along Y axis (usually oriented along structural strike). However the anisotropy can be arbitrary and take into account several fracture systems with different spatial orientations.
In contrast with 2.5D-3C, 3D-3C Acoustic and Elastic modelling allows approximating wave propagation in conditions of realistically heterogeneous (in all 3 directions X-, Z- and Y-) medium. This modelling can be applied to the objects like reefs, salt domes, different kinds of collapse/breakthrough chimneys or steeply inclined faults etc. in the areas where an accurate 3D reservoir characterization is required.
Note*: 2.5-3D-3C Full-wave (finite-difference) modelling, due to its computational intensity, is based on Parallel Options including multi-core, -node, -GPU solutions allowing to run such simulations in a feasible turnaround time.