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Technical Content

Technical Abstract
EAGE - European Association of Geoscientists and Engineers | Mohammad Farooqui, Diego Carotti (CGG) ; Moosa Jahdhami (Petroleum Development Oman) ©2021 EAGE | May

The geology of northern Oman presents significant challenges for land velocity model building. We show in this paper that these challenges can be overcome by using an integrated high-resolution velocity model workflow, through the combination of different types of waves, that allow resolving different ...

Technical Abstract
EAGE - European Association of Geoscientists and Engineers | Diego Lopez, Pierre Roy, Benjamin Roure (CGG) ; Anne-Sophie Barnola, Joffrey Brunellière (Total) ©2021 EAGE | May

Inversion has become the standard procedure to quantify elastic properties using seismic. PP seismic is commonly used for this purpose, but in areas where PP seismic is affected by gas pockets or mud volcanoes, the reflectivity can be compromised for reservoir characterization. PP-PS inversion ...

Technical Abstract
EAGE - European Association of Geoscientists and Engineers | Benjamin Roure ©2020 EAGE | May

Pure S-wave (SS) seismic data have the potential to bring significant uplift to seismic imaging and reservoir characterization. Combining PP, PS and/or SS data in a joint inversion for seismic reservoir characterization presents some theoretical advantages for the estimation of shear-velocity and density related ...

Technical Abstract
EAGE - European Association of Geoscientists and Engineers | Diancheng Wang, Chi Chen, Dongping Zhuang, Jiawei Mei, Ping Wang ©2020 EAGE | May

Land seismic presents more and different challenges for Full-Waveform Inversion (FWI) than marine data. Among these challenges, the most fundamental ones are the irregular topography, strong nearsurface effects, and common FWI difficulties such as cycle-skipping and amplitude issues. In this work, we propose to ...

Technical Abstract
EAGE - European Association of Geoscientists and Engineers | Ross Haacke, Malgorzata Drwila, Richard Higgins, Harrison Joad (CGG) ; Steve Knapp, Christian Schiott (Hess) ; C. Hidalgo, N.Ahmad (INEOS) ©2021 EAGE | May

The migrated dip-angle domain provides a powerful opportunity to distinguish 4D noise from signal based on similarity filtering applied to data decomposed by position, frequency, and geological dip. However, 4D signal protection is problematic when the signal itself forms from differences between baseline and ...

Technical Abstract
EAGE - European Association of Geoscientists and Engineers | Gordon Poole ©2021 EAGE | May

Marine seismic surveys in shallow water regions typically suffer from acquisition striping and poor shallow resolution. Multiple imaging has been discussed in the literature for several years as a processing-based approach to this problem. We compare least-squares wave-equation multiple migration (LS-WEMM) results for towed-streamer ...

Technical Abstract
EAGE - European Association of Geoscientists and Engineers | James Cooper, Andrew Ratcliffe, Gordon Poole ©2020 EAGE | May

Existing methods for addressing cycle skipping in full-waveform inversion (FWI) typically involve either a modification of one of the data sets used to compute the least-squares objective function, or a reformulation of the objective function itself, often in terms of a traveltime (or equivalent) ...

Technical Abstract
EAGE - European Association of Geoscientists and Engineers | Sylvain Masclet, Guillaume Bouquard, Herve Prigent ©2020 EAGE | May

With a shallow anhydrite layer, strong multiples and converted wave contamination, Southern Oman represents an outstanding challenge for land velocity model building and imaging. While acoustic land full-waveform inversion (FWI) has proved successful on new broadband datasets in Northern Oman, no successful application has ...

Technical Abstract
EAGE - European Association of Geoscientists and Engineers | Huawei Gao, Chujia Chen, Chi Chen, Jiawei Mei, Rongxin Huang (CGG) ; Ge Zhan, Jay Nahm (BP) ©2021 EAGE | May

We present a 4D case study of time-lapse multi-well Vertical Seismic Profiling (VSP) acquired with Distributed Acoustic Sensing (DAS) at the Mars field, deepwater Gulf of Mexico. In this work, we are able to obtain meaningful 4D signals from multi-well DAS VSPs by addressing ...