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Migration velocity analysis using traveltime wavefield tomography

Publikováno v: GEOPHYSICS. 77:U73-U85

We introduce an integrated wave-equation technique for migration velocity analysis (MVA) that consists of three steps: (1) forming the extended data, (2) approximating the correct transmitted wavefield, and (3) using wavefield tomography to update th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7f5952954da92826f950976fdb02426e
https://doi.org/10.1190/geo2011-0440.1

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Migration velocity analysis using the common image cube (CIC)

Autor: Jianwu Jiao, Saleh M. Al-Saleh, Adam Fox

Publikováno v: GEOPHYSICS. 76:WB127-WB134

Migration velocity analysis (MVA) is commonly performed in the image domain in conjunction with ray-based tomography to update the velocity model. This approach can be challenging in the presence of large velocity errors as it may require many MVA it

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::232c48228d05a64426e2c7b1d705e9c4
https://doi.org/10.1190/geo2010-0387.1

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3‐D TTI eikonal traveltime Kirchhoff migration

Autor: Jianwu Jiao

Publikováno v: SEG Technical Program Expanded Abstracts 2005.

I present a finite-difference algorithm based on perturbation theory to solve the eikonal equation in tilted transversely isotropic media using a stable and efficient expanding wavefront method. The finite difference approach is preferred over ray tr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b8845f797a22b8d06f6956e0465375e1
https://doi.org/10.1190/1.2142215

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Reducing Spatial Aliasing in Wave-Equation Multiple Attenuation

Autor: Pierre Leger, John Stevens, Jianwu Jiao

Publikováno v: All Days.

Abstract Multiples are a major problem in offshore seismic exploration. Wave-equation methods are a popular tool for multiple attenuation, but behave poorly in the presence of spatial aliasing. This paper will propose a method to reduce the effect of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c042ad84268ceeabc17ff76980e5d095
https://doi.org/10.4043/14077-ms

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Enhancements to wave‐equation multiple attenuation

Autor: John Stevens, Jianwu Jiao, Pierre Leger

Publikováno v: SEG Technical Program Expanded Abstracts 2002.

Wave-equation extrapolation and adaptive subtraction methods are well established technique for water-bottom and pegleg multiple attenuation (Bernth and Sonneland, 1983; Wiggins, 1988; Julien and Raoult, 1989; Hardy et al., 1991). Conventional implem

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::905ce0b93ea34bbed0b918b3b980965a
https://doi.org/10.1190/1.1817116

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