About birefringence effects and theircompensations

摘要

The effects of birefringence or shear wave splitting on a single raypath recorded with a goodrnsignal to noise ratio can be described and formalized easily, offering a way of derivingrnbirefringence attributes: natural orientation, percentage of azimuthal anisotropy andrndifferential attenuation. To benefit from a good signal, attributes are most often derived fromrnthe main seismic horizons; such approach represents a limitation of the resolution. A briefrndescription of the basic principles and procedures used to define birefringence attributes isrnpresented. A global optimization approach that is able to deliver the birefringence attributesrnwithin a 3D block for thinner intervals is proposed.