Static correction enhancement by turning ray tomography

Baddari, Kamel; Djarfour, Nouredine; Djeddi, Mebrouk; Ferahtia, Jalal; Mander, Mourad

Bulletin du Service Géologique de l'Algérie
Volume 23, Numéro 2, Pages 189-198
2012-05-01

Static Correction Enhancement By Turning Ray Tomography

Authors : Baddari Kamel . Djarfour Nouredine . Djeddi Mebrouk . Ferahtia Jalal . Mander Mourad .

Abstract

This paper presents the use of turning-ray tomography to reconstruct the velocity distribution in the weathered zone from the first arrival times of seismic waves. This technique is a velocity-inversion approach, which uses turning-rays (incident rays, continuously refracted direct rays) from any acquisition geometry to find iteratively the velocity computations of the weathered zone between the source and the receivers. This method does not require simplified assumptions such as a constant velocity layered homogeneous model. The Turning Ray Tomography is very efficient and allows velocity computations even in complex geological area. The efficiency of this tomographic technique was tested on synthetic data and applied on real seismic data from southern Algeria as a typical case study. The obtained results show clearly an improvement in seismic section quality using the static corrections calculated by turning-ray tomography when compared to the one based on classical method known as DRM.