Preprints
https://doi.org/10.5194/se-2021-143
https://doi.org/10.5194/se-2021-143
 
26 Jan 2022
26 Jan 2022
Status: this preprint was under review for the journal SE. A revision for further review has not been submitted.

Angle-domain common-image gathers from Fresnel volume migration

Tomi Jusri, Stefan Buske, Olaf Hellwig, and Felix Hloušek Tomi Jusri et al.
  • Institute of Geophysics and Geoinformatics, TU Bergakademie Freiberg, Gustav-Zeuner-Str. 12, 09596 Freiberg, Germany

Abstract. In complex geological settings, such as in hard-rock environments, Fresnel volume migration (FVM) has been successfully applied and found to deliver superior image quality compared to conventional imaging techniques. However, previous studies on FVM have mainly focused on obtaining kinematic seismic images, and the analysis of the migrated amplitudes has not received major attention. Therefore this study presents a method for constructing angle-domain common-image gathers (ADCIGs) and common-angle stacks from FVM, which can facilitate prestack amplitude analysis from the migrated seismic data in the angle-domain. These ADCIGs were constructed inside the migration loops using phase slowness vectors derived from traveltime gradient fields. We then tested this method on synthetic and field seismic data and investigated the reliability of the output for amplitude versus angle (AVA) analysis. The test results obtained showed that the AVA responses from the common-angle stacks resemble that of the input synthetic shot gather of migration relatively well, indicating the promising feasibility of AVA analysis from common-angle stacks. When implemented on field data acquired from a hard-rock environment, the proposed method can provide common-angle stacks with a higher signal-to-noise ratio and better reflection coherency compared to the common-angle stacks from the standard Kirchhoff prestack depth migration. This study extends the implementation of FVM toward amplitude analysis, which can help improve the feasibility of hard-rock characterization.

Tomi Jusri et al.

Status: closed (peer review stopped)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on se-2021-143', Anonymous Referee #1, 24 Feb 2022
    • AC1: 'Author response to Referee 1', Tomi Jusri, 08 Apr 2022
    • AC3: 'Additional information: references', Tomi Jusri, 08 Apr 2022
  • RC2: 'Comment on se-2021-143', Anonymous Referee #2, 04 Mar 2022
    • AC2: 'Author response to Referee 2', Tomi Jusri, 08 Apr 2022
  • EC1: 'Editor Comment on se-2021-143', Michal Malinowski, 09 May 2022
    • AC4: 'Reply on EC1', Tomi Jusri, 11 May 2022

Status: closed (peer review stopped)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on se-2021-143', Anonymous Referee #1, 24 Feb 2022
    • AC1: 'Author response to Referee 1', Tomi Jusri, 08 Apr 2022
    • AC3: 'Additional information: references', Tomi Jusri, 08 Apr 2022
  • RC2: 'Comment on se-2021-143', Anonymous Referee #2, 04 Mar 2022
    • AC2: 'Author response to Referee 2', Tomi Jusri, 08 Apr 2022
  • EC1: 'Editor Comment on se-2021-143', Michal Malinowski, 09 May 2022
    • AC4: 'Reply on EC1', Tomi Jusri, 11 May 2022

Tomi Jusri et al.

Tomi Jusri et al.

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Short summary
This study presents a method for constructing angle-domain common-image gathers (ADCIGs) and common-angle stacks from Fresnel volume migration, which can facilitate prestack amplitude analysis from the migrated seismic data in the angle-domain. The results obtained in this study may eventually help improve the feasibility of rock characterization in challenging geological settings, such as in hard-rock environments.