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Technical Content

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 ...

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Technical Abstract

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 ...

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Technical Abstract

Unlocking unprecedented seismic resolution with FWI Imaging

EAGE - European Association of Geoscientists and Engineers | Zhiyuan Wei, Jiawei Mei, Zedong Wu, Zhigang Zhang, Rongxin Huang, Ping Wang ©2021 EAGE

A high-resolution seismic image is of great importance to exploration and production in many ways, such as bypassing drilling hazards and identifying compartmentalized reservoirs. To achieve seismic resolution as high as possible, the conventional seismic imaging process takes more of a linear approach to ...

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Technical Abstract

Resolving 4D Overburden Changes with Full-Waveform Inversion

EAGE - European Association of Geoscientists and Engineers | Ololade Bukola, Bingmu Xiao, James Sinden (CGG) ; Edith Miller, Peter Nevill (Chevron Technology Centre) ; Lydia Novakovic (Chevron North America Exploration and Production) ©2021 EAGE

4D time-lapse seismic imaging is typically performed using the same velocity model to migrate the baseline and monitor data. However, in complex cases where one producing reservoir sits above another, significant changes in the properties of the overlying reservoir can result in a 4D ...

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Technical Abstract

Data-driven method for training data selection for deep learning

EAGE - European Association of Geoscientists and Engineers | Celine Lacombe, Issa Hammoud, Jeremie Messud, Hanyuan Peng, Thibault Lesieur, Paulien Jeunesse ©2021 EAGE

Convolutional based deep neural networks can be used in addition to existing workflows, to improve turnaround or as a ‘guide’ for further processing. Whilst a lot of effort has been made to try to improve the DNN architecture for processing tasks or to understand ...

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Technical Abstract

Building and Understanding Deep Neural Networks Components for Seismic Processing: Lessons Learned

EAGE - European Association of Geoscientists and Engineers | Mathieu Chambefort, Jeremie Messud ©2020 EAGE

Learning how to best mimic seismic processing algorithms or workflows with deep learning (DL) has become a very active field of research. However, seismic processing own particularities may necessitate adaptations of current DL methods. In this paper, we explain and illustrate how the different ...

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Technical Abstract

A practical implementation of converted-wave reflection full-waveform inversion

EAGE - European Association of Geoscientists and Engineers | Nabil Masmoudi, Andrew Ratcliffe, Min Wang, Yi Xie (CGG) ; Tengfei Wang (Tongji University) ©2021 EAGE

Depth imaging of converted-wave (P-to-S) ocean-bottom seismic (OBS) data requires a depth model for both the P- and S-wave velocities. Building the S-wave velocity model is very challenging: conventional techniques include PP and PS image registration, or joint PP and PS tomography. These approaches ...

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Technical Abstract

Resolving Complex Carbonate Imaging Challenges with FWI on Short-Offset Vintage Streamer Data

EAGE - European Association of Geoscientists and Engineers | Peipei Deng, Min Wang, Zhonghuan Chen, Keat Huat Teng, Barry Hung (CGG) ; Y. Kim, K. Lee, C. Jeong, S. Oh, H. Choi, S. Kim (SK innovation), F. Huang, M. Luo (CNOOC) ©2020 EAGE

Carbonate velocity model building is challenging due to the complex geometry and sharp velocity contrasts associated with carbonates. Full-waveform inversion (FWI), together with long offsets, wide azimuth and good low frequency data, is known to be a powerful tool to address these challenges. Unfortunately ...

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Industry Article

Northern North Sea: a dual-azimuth solution

GeoExpro | Anna Rumyantseva, Jaswinder Mann, Idar Kjørlaug ©2022 GeoPublishing Ltd

The Northern North Sea is a very active area for oil and gas exploration with several commercial discoveries made over the last few years. These include the Dugong discovery on the Tampen Spur and multiple discoveries in the Greater Fram area on the Horda ...

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