Artículos de revistas
Common-reflection-point Time Migration
Registro en:
Studia Geophysica Et Geodaetica. Springer, v. 60, p. 500 - 530, 2016.
0039-3169
1573-1626
WOS:000382365100009
10.1007/s11200-015-0392-1
Autor
Coimbra
Tiago A.; Faccipieri
Jorge H.; Rueda
Dany S.; Tygel
Martin
Institución
Resumen
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Since the early days of seismic processing, time migration has proven to be a valuable tool for a number of imaging purposes. Main motivations for its widespread use include robustness with respect to velocity errors, as well as fast turnaround and low computation costs. In areas of complex geology, in which it has well-known limitations, time migration can still be of value by providing first images and also attributes, which can be of much help in further, more comprehensive depth migration. Time migration is a very close process to common-midpoint (CMP) stacking and, more recently, to zero-offset commonreflection- surface (CRS) stacking. In fact, Kirchhoff time migration operators can be readily formulated in terms of CRS parameters. In the nineties, several studies have shown advantages in the use of common-reflection-point (CRP) traveltimes to replace conventional CMP traveltimes for a number of stacking and migration purposes. In this paper, we follow that trend and introduce a Kirchhoff-type prestack time migration and velocity analysis algorithm, referred to as CRP time migration. The algorithm is based on a CRP operator together with optimal apertures, both computed with the help of CRS parameters. A field-data example indicates the potential of the proposed technique. 60 3 500 530 National Council for Scientific and Technological Development (CNPq-Brazil) National Institute of Science and Technology of Petroleum Geophysics (INCT-GP-Brazil) Center for Computational Engineering and Sciences (Fapesp/Cepid) [2013/08293-7-Brazil] Wave Inversion Technology (WIT) Consortium Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)