Accession Number : ADA327489

Title :   Test on Marmousi Data of Velocity Analysis by Perturbation,

Corporate Author : COLORADO SCHOOL OF MINES GOLDEN CENTER FOR WAVE PHENOMENA

Personal Author(s) : Liu, Zhenyue

PDF Url : ADA327489

Report Date : MAY 1995

Pagination or Media Count : 16

Abstract : Velocity model determination on the Marmousi data is a major challenge for current velocity analysis methods because of the extreme complexity of the model. A new velocity analysis method has been developed and is tested on the Marmousi data. This method characterizes a velocity distribution by the macro model and uses an analytical formula to update velocity. Our formula estimates the update in velocity by computing a derivative function of imaged depths with respect to velocity in a general background medium context. This formula is more accurate than conventional ones based on hyperbolic residual moveout when the medium has strongly lateral velocity variations. The test results show our velocity analysis method to be superior for complex media such as in the Marmousi model.

Descriptors :   *VELOCITY, *PERTURBATIONS, MATHEMATICAL MODELS, SEISMIC DATA, RAY TRACING, TRAVEL TIME.

Subject Categories : Numerical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE