Arthur B. Weglein : Recent Keynote Addresses, Publications, Research Objectives, Progress and Plans, Summer(2024)
Posted on August 05, 2024
Dear Colleagues and Friends,
I hope that this note finds you very well.
For your possible interest, please find in the link below an “ Update on Research, Objectives and Plans( Summer(2024))”. For easy reference please find a few items below that are inside the update link.
https://www.academia.edu/112102470/
http://mosrp.uh.edu/news/two-papers-to-appear-in-jse-in-february-2022
Recent Keynote addresses and the new messages they contain.
Below, please find several recent Keynote Addresses- one at the 2022 SEG International Conference Workshop on ‘FWI/FWM and New Imaging Concepts and Capability’ September 1, 2022 at the George R. Brown Convention Center in Houston, Texas USA, and one November 28-30 in 2023, at the SEG/KOC Workshop “ On-shore and Shallow Water Exploration Challenges” in Kuwait City , Kuwait and an extended and comprehensive version of the latter Keynote in 2024.
The extended version of the 2023 SEG/KOC Workshop Keynote presentation “A Perspective on Advances and Challenges in Seismic Exploration: 2024” can be found in the link below.
The link above also contains the slides of these two video recordings and the papers cited therein. The longer presentation provides “A Big Picture” with a more detailed and comprehensive seismic perspective.
Topics within this (2024) Keynote include:
Why all (direct and indirect)seismic processing methods require multiples to be removed at some point either initially or eventually ( of course that includes FWI).
That seismic waves are ubiquitous and have no illumination issues- but processing with intrinsic high frequency approximation/ ray theory methods such as Kirchhoff or RTM squeeze the recorded wave field back, into the subsurface along rays ( and rays are not ubiquitous) and therefore RTM migration produces illumination issues.
The new Stolt Claerbout III (SC III ) migration for smooth or discontinuous heterogeneous media is the only migration method that doesn’t make high frequency/ ray theory approximations in both the imaging principle and the propagation model. It is the only migration method that can automatically image and invert planar, curved or pinch-out reflectors. SCIII has higher resolution capability compared to Kirchhoff and RTM.
The inverse scattering series methods for attenuating and eliminating internal multiples are the only internal multiple removal methods that: contains a water speed SCIII migration and operates without knowing, estimating, or determining subsurface information.
No other internal multiple removal algorithm (e.g., Radon, Feed-back, Marchenko, Jakubowicz) satisfies one of those properties- let alone both.
A response to several prioritized onshore and shallow water open issues and challenges is presented.
In 1985, migration was conceptually and practically more advanced than multiple removal- now that situation is reversed. We hope that( in the near future) migration can catch up to multiple removal. Details are provided in the video presentations.
For your possible interest, please find the Keynote address presented at the 2022 SEG International Conference Workshop on ‘FWI/FWM and New Imaging Concepts and Capability’ September 1, 2022, at the George R. Brown Convention Center in Houston, Texas USA.
https://www.youtube.com/watch?v=-9h7QhNs79c
I hope that you find these presentations and publications to be informative, interesting, and worthwhile. I look forward to staying in touch.
In summary
In science and in research there are no closed subjects and ultimate solutions- it’s always a work in progress- and all scientific methods make assumptions and are provisional. Today’s reasonable assumption is tomorrow’s impediment to
effectiveness and increased capability.
The two-volume set for Cambridge University Press with Bob Stolt ( please see the update link above)communicates both recent advances and open issues ( please see the KOC/SEG (2024) ( extended) Keynote Address) . Thank you.
I look forward to staying in touch.
Warmest best wishes, always,
Arthur
Dr. Arthur Benjamin Weglein
Hugh Roy and Lillie Cranz Cullen Distinguished University Chair in Physics
Director, Mission-Oriented Seismic Research Program
Physics Department
University of Houston
Science and Research Building Room 617
Houston, Texas, 77204-5005
E mail aweglein@central.uh.edu