3D Visualization in Sismage
As any other seismic interpretation platform, Sismage proposes a 3D visualisation environment which allows the display all the available data needed for the interpretation : seismic and attributes bloc (with or without volume rendering), horizons, faults, bodies, wells, satellite images, etc … All picking operations (manual or automatic) can obviously be done in this 3D View. The innovation proposed by Sismage concerns faults picking. Indeed we provide two new methodologies called « Fault Peeling » and « Fault Tracker ». The « Fault Peeling » consists in converting a fault attribute block into a set of small independent fault planes in 3D (extracted along maximum values of the fault attribute) and the neighbouring relation between them (3D connectivity of these small planes). Then the process starts by posting seeds on one or several locations : each seed corresponds to an elementary fault plane. Semi-automatic picking can be done by merging all these elementary planes. Automatic propagation of these elementary planes can also be performed according to the neighbouring relations extracted before and to some 3D geometric properties such as planarity dip and azimuth. The « Fault Tracker » is a new kind of picking based on animation of the seismic bloc in order to improve faults visualisation in a noisy environment. We start by defining a direction of animation (fault direction) and then we display the seismic bloc as a movie (each displayed section is orthogonal to the defined direction). The user can then pick the fault during the animation, as well as play with the speed of animation. These two new techniques allows to build very quickly a 3D triangulated faults network that can be exported directly to the geomodel. The presentation will focus on the Sismage 3D visualisation capabilities for the construction of a geomodel.
Advances in 3-D Visualization and Interpretation Techniques
2004 AAPG International Conference and Exhibition Technical Program