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NMO Velocity Ellipse in Tilted Elastic Orthorhombic Medium
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 78th EAGE Conference and Exhibition 2016, May 2016, Volume 2016, p.1 - 5
Abstract
Summary
We demonstrate the way to calculate a NMO velocity ellipse for direct and reflected (including converted) wave modes in a homogeneous horizontal layer with tilted orthorhombic symmetry (the tilt is defined by three Euler angles). For elliptic orthorhombic model, we present explicit expressions for the shift of the minimum of a traveltime surface. We use numerical examples to demonstrate how the position of a NMO velocity ellipse behaves depending on the orientation of the symmetry planes in an orthorhombic medium.
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