Sorry, you need to enable JavaScript to visit this website.

Technical Content

Technical Abstract

Least-Squares Dip Angle 4D Migration for OBN and Towed Streamer Imaging

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

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 ...

Download Resource
Technical Abstract

Least-squares multiple imaging constrained jointly by OBN and towed-streamer data

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

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 ...

Download Resource
Technical Abstract

Mitigating Cycle Skipping in Full-Waveform Inversion Using Partial Matching Filters

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

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) ...

Download Resource
Technical Abstract

Multi-Wave and Full-Waveform Inversion in Southern Oman

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

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 ...

Download Resource
Technical Abstract

Thrust Fault and Sub-Thrust Imaging in the Taranaki Basin With Least-Squares Tilted Orthorhombic Q-RTM

EAGE - European Association of Geoscientists and Engineers | Zongying Gong, Min Zhi, Xiaodong Wu, Yi Xie, Barry Hung (CGG) ; Andrew McCarter, Kennerly Dups (WestSide Corporation) ©2020 EAGE

The Taranaki Basin is one of New Zealand’s largest basins. Initially forming as a Cretaceous rift basin, it has over 400 exploration and production wells. Early basin history is characterized by extensional fault blocks, and as basin evolution continued, thrusting and inversion associated with ...

Download Resource

Ultra-high density land nodal seismic – Processing challenges and rewards

EAGE - European Association of Geoscientists and Engineers | Federico Buriola, Keith Mills, Sharon Cooper, Steve Hollingworth ©2021 EAGE

The desire for ultra-high density (UHD) seismic surveys is now becoming more achievable for future exploration and field development with the increasing availability of versatile nodal land systems. Acquisition geometry design using a higher density of sources as well as receivers considerably reduces the ...

Download Resource
Technical Abstract

Overcoming shallow water imaging challenges in Australia’s North West Shelf

EAGE - European Association of Geoscientists and Engineers | Xiang Li, Kai Zhao, Hui Zhang, Jianfeng Yao, Sergey Birdus, Joe Zhou ©2020 EAGE

The North West Shelf, situated in Western Australia, is a world-class offshore hydrocarbon province. The presence of hard water bottom, near water bottom reflectors and shallow Tertiary carbonates not only generates strong multiples but also distorts the ray-paths for deeper reflectors. Seismic data quality ...

Download Resource
Technical Abstract

Pre-migration residual multiple subtraction using post-migration matching for North Sea OBN data

EAGE - European Association of Geoscientists and Engineers | Gareth Jones, Julian Holden, Ramez Refaat, Katarzyna Galyga, Luke Summers (CGG) ; Adrian Merry, Eoin McManus, Sam Whitehead (Total) ©2021 EAGE

In the North Sea, water bottom related surface multiples offer one of the largest challenges to a seismic processing project with a careful balance between multiple attenuation and primary preservation required when using a model and subtract approach. For Ocean Bottom Node (OBN) data ...

Download Resource
Technical Abstract

Revealing Complex Sub-Basalt Structures Offshore India Through Advanced Seismic Processing

EAGE - European Association of Geoscientists and Engineers | Xiaobo Li, Priyanka Bhattacharjee, Peipei Deng, Keat Huat Teng, Barry Hung, Jason Sun (CGG) ; Subhankar Basu, N.N.B. Naidu (ONGC) ©2020 EAGE

Sub-basalt seismic imaging is very challenging due to large impedance contrasts at sediment-basalt interfaces. The impedance of basalt usually gives a strong reflection coefficient at the top of basalt, and thus generates strong multiples. Offshore western India, this issue is compounded by short-period seabed ...

Download Resource
Share Link
LinkedIn icon Facebook icon Twitter icon