Multicomponent and source-free converted-wave reverse time migration for VSP

Du, Yue; Li, Yunyue Elita; Yang, Jizhong; Cheng, Arthur; Fang, Xinding

doi:10.1190/segam2018-2994695.1

Cited by 2 publications

(1 citation statement)

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“…Each wavefield component contributes to the final image to varying degrees, especially the primaries and surface‐related multiples. Conventional imaging methods for VSP data mostly rely on the upgoing primary‐only wavefield, which is a natural application of primary migration method from SSP to VSP data, for instance, Kirchhoff migration (Keho, 1984; Wiggins, 1984; Dillon, 1988; Gherasim et al ., 2005; Lou and Simpson, 2019), reverse time migration (Chang and Mcmechan, 1986; Xiao and Leaney, 2010; Du et al ., 2018), interferometric migration (Hornby and Yu, 2006; He et al ., 2008; Xiao and Schuster, 2008; Neklyudov and Borodin, 2009) and Gaussian beam migration (Protasov and Tcheverda, 2012). These types of VSP migration methods mainly consider imaging the upgoing primary reflections.…”

Section: Introductionmentioning

confidence: 99%

A joint imaging method of vertical seismic profiling data by generalized radon transform migration

Mao

Li³

et al. 2021

Geophysical Prospecting

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The images produced by conventional vertical seismic profile imaging methods often suffer from the problems of illumination limitation and uncompleted wavefield separation. In this paper, we give a deep insight into the illumination behaviours of the upgoing primary and downgoing multiple signals and illustrate their merits and demerits in illuminating the subsurface structure around the well trajectory. Based on this, we develop an efficient joint imaging method of acoustic vertical seismic profile data based on the generalized Radon transform migration inversion theory. By analysing the interference characteristics of the primary and multiple reflections, we verify the capability of this method that can handle the joint imaging directly. The proposed method combines the advantages of primary and multiple contributions to the subsurface image without additional wavefield separation. The numerical results of synthetic data and field data demonstrate high‐quality construction of the structure in the vicinity of the borehole, also away from the well trajectory.

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