4-6 Dec 2017
Full waveform inversion has emerged as a key technology for pursuing our Earth imaging objectives. However, to achieve these objectives, we need to address the following open issues:
- What acquisition effort is needed and worthwhile? What benefit is delivered by broadband, long-offset data?
- What are the limits of the acoustic formulation in the presence of large elastic contrasts (e.g., salt, volcanic, basalts, etc.)? How far can we push these back with multi-parameter formulations? Can acoustic FWI still deliver value where, a priori, it might seem necessary to switch to (visco-)elastic formulations such as onshore or in areas with strong property contrasts?
- Are we able to recover the kinematics of reflections, even with a sufficiently good initial model with a waveform approach or should we rely on image-based methods and their extensions?
- How does high-resolution FWI compare with traditional impedance inversion approaches for reservoir characterization in 3D and 4D? Can we directly interpret the FWI output instead of going to attributes?
- Is there any real benefit from applying waveform inversion to micro-seismic events and/or any other kind of passive seismic data?
- What applications of FWI deliver clear business value and how – risk reduction, improved turnaround?
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SEG Middle East
Tel: +971 4 3724880
Fax: +971 4 3724204
In this, the third of the series of (Middle East) workshops on the subject of full waveform inversion, we moved our focus to results – the current benefits realized from FWI and those perceived as arriving in the near future. We sought answers and testimony as to whether FWI can deliver any or all of:
- Better seismic images
- Improved velocity models in complex areas, such as subsalt
- More accurate reservoir characterization
- More precise locations of microseismic events caused by fracking and induced seismicity
- Reliable information on changes in reservoir states over time from repeated acquisitions
- Uncertainty information necessary to quantify our confidence in the results for a price the end-user is happy to pay, so that we may evaluate where we are and where we should go with FWI.
Technical Topics covered:
- Acquisition & Pre-processing for FWI
- Onshore and Offshore case studies
- Extended FWI / Image based FWI
- Time Lapse and passive data inversion
- Near Surface FWI
- Constraints in FWI
- Software/computer aspect
Dr. Mustafa Ali, Saudi Aramco
- Constantinos Tsingas, Saudi Aramco
- Jean Virieux, Université de Grenoble I (Joseph Fourier)
- Herve Chauris, Ecole des Mines de Paris
- Andreas Fichtner, ETH Zürich
- Antoine Guitton, Colorado School of Mines
Husam Mustafa, Saudi Aramco
Tariq Al Khalifah, KAUST
Riyadh Al-Saad, Saudi Aramco
Kwangjin Yoon, Saudi Aramco
Ali Momin, Saudi Aramco
Herve Chauris, MINES Paristech
Gerhard Pratt, Western University
Rene Plessix, Shell
Aldo Vesnaver, Petroleum Institute
Jiubing Cheng, Tongji University
Denes Vigh, Schlumberger
Gilles Lambare, CGG
Maarten de Hoop, Rice University
Anatoly Baumstein, ExxonMobil
Ahmad Riza Ghazali, Petronas
Tugrul Konuk, Petronas
Mohammad Jassem, KOC
Paul Williamson, TOTAL
Li Peimingz, BGP