Preserving Geological Information during Real-Time Editing of Faults in Tetrahedral Models
Authors
A.-L. Tertois
Journal/Article/Conference
Proc. IAMG 2006
Abstract
Modelling underground physical processes with finite elements or finite
differences methods requires volume meshes of the subsurface.
Tetrahedral grids offer much greater geometric accuracy than
Cartesian or curvilinear grids because cell sizes and shapes can
adapt to complex geological features. In tetrahedral grids, faults
can be modelled as topological discontinuities. Accounting for new
information on fault geometry through a complete rebuild of the
model is time-consuming. Instead, we present a tool which makes
small geometric modifications to faults in tetrahedral models. Fault
editing is performed without computing a new tessellation for the
whole model, and in real-time so that feedback is immediate. If
these modifications occur close to a fault contact, consistent fault
contact geometry is maintained: the secondary fault moves along the
main fault without going through it, and the overall shape of the
main fault does not change. When the edited model contains
geological properties, the rock properties attached to the points in
the model are updated in order to maintain the spatial continuity of
the property in each fault block and according to fault throw, and
to maintain the conditioning to well or seismic data in the edited
domain.
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BibTeX Reference
@inproceedings{Tertois06IAMG,
| AUTHOR
|
=
{A.-L. Tertois}
,
|
| TITLE
|
=
{Preserving Geological Information during Real-Time Editing of Faults in Tetrahedral Models},
|
| BOOKTITLE
|
=
{Proc. IAMG 2006},
|
| YEAR
|
=
{2006},
|
}
