An efficient 3D explicit depth migration

Jiaxiang Ren; Clive Gerrard; James McClean; Mikhail Orlovich; Andrew Long

doi:10.1071/ASEG2004ab121

ISSN: 2202-0586
E-ISSN:

oa An efficient 3D explicit depth migration
Authors Jiaxiang Ren^a, Clive Gerrard^b, James McClean^c, Mikhail Orlovich^d and Andrew Long^e
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^a PGS Marine Geophysical,, USA, [email protected] ^b PGS Marine Geophysical,, USA, [email protected] ^c PGS Marine Geophysical,, USA, [email protected] ^d PGS Marine Geophysical,, USA, [email protected] ^e PGS Marine Geophysical,, Australia, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2004, Issue ASEG2004 - 17th Geophysical Conference, Dec 2004, p. 1 - 4
DOI: https://doi.org/10.1071/ASEG2004ab121
- Published online: 01 Dec 2004

Abstract

An explicit, constrained operator is used for wavefield extrapolation in 3D wave equation depth migration. The migration cost and image quality benefit from its reduced number of independent coefficients, negligible numerical anisotropy, and flexibility that allows for different propagation angles and step sizes in the inline and crossline directions. In order to further reduce the computational workload we dynamically select operator lengths and extrapolation step sizes based on the wavenumber of the wave components being migrated. The phase-shifted linear interpolation that we propose for interpolating the extrapolated wavefield is suitable for the explicit migration, and significantly improves the accuracy of the result when compared with the linear interpolation typically used in implicit migrations.

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2004-12-01

2026-01-14

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References

Biondi, B. and Palacharla, G., 1995, 3D depth migration by rotated McClellan filter: Geophysical Prospecting, 43, 1005-1020.
Blacquiere, G., Debeye, H. W. I, Wapenaar, C. P. A., and Berkhout, A. I, 1989, 3-D table driven migration: Geophysical Prospecting, 37, 925-958.
Hale, D., 1991, 3-D depth migration via McClellan transformations: Geophysics, 56, 1778-1785.
Mittet, R., 2002, Explicit 3D depth migration with a constrained operator: 72nd Annual International Meeting, SES, Salt Lake City, Expanded Abstracts, 1148-1151.
Sollid, A., and Arntsen, B., 1994, Cost effective 3D one-pass depth migration: Geophysical Prospecting, 42, 755-776.
Soubaras, R., 1992, Explicit 3-D migration using equiripple polynomial expansion and Laplacian synthesis: 62nd Annual Internatinal Meeting, SEG, New Orleans, Expanded Abstracts, 905-908.

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Article Type: Research Article

Keyword(s): constrained operator; depth migration; explicit operator; interpolation; wavefield extrapolation

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oa An efficient 3D explicit depth migration

Abstract

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