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

Technical Content

Technical Abstract

Extracting Knowledge with NLP from Massive Geological Documents

EAGE - European Association of Geoscientists and Engineers | Chin Hang Lun, Thomas Hewitt ©2021 EAGE

There have been many advances in natural language processing in recent years but most of the work have been focused on texts from a general domain or medicine and so datasets in the geology domain are sadly lacking. We demonstrate how existing taxonomy and ...

Download Resource
Technical Abstract

FWI velocity and imaging: A case study in the Johan Castberg area

EAGE - European Association of Geoscientists and Engineers | Nicolas Salaun, Mathieu Reinier, Isabel Espin, Guillaume Gigou ©2021 EAGE

The Greater Castberg survey was acquired in 2019 using a source-over-spread acquisition design with an additional source at the front of the streamers, towed by the receiver boat, to permit recording of longer offsets. Starting from an initial anisotropic model, time-lag full waveform inversion ...

Download Resource
Technical Abstract

Imaging Rich Azimuth Towed Streamer Data West of Shetland

EAGE - European Association of Geoscientists and Engineers | Harrison Moore, Simon Drummie, Ewa Kaszycka, Gordon Poole, Krzysztof Cichy ©2020 EAGE

We discuss the processing and imaging challenges relating to a marine seismic survey acquired northwest of the Shetland Islands. The proximity of the survey to the islands forced the acquisition direction to be strike to the subsurface geology. A shooting vessel provided wide azimuth ...

Download Resource
Technical Abstract

Impact of streamer acquisition geometry on FWI Imaging

EAGE - European Association of Geoscientists and Engineers | Henry Kerrison, Paul Fallon, Ewa Kaszycka, Krzysztof Cichy, Andrew Ratcliffe, Nabil Masmoudi ©2021 EAGE

The combination of ever-increasing computational power and more robust algorithms have made it possible to run full-waveform inversion (FWI) to higher frequencies and, also, offer more possibilities to take advantage of the reflections in the inversion. Through a process known as FWI Imaging, the ...

Download Resource
Technical Abstract

Joint PP-PS-SS Inversion in Native Time Domain Optimizing Registration Through Travel Times Estimation

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

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 ...

Download Resource
Technical Abstract

Land FWI: Challenges and possibilities

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

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 ...

Download Resource
Industry Article

Gabon Offshore - New Technology Enhancing Imaging of Complex Subsurface in Gabon

EAGE - European Association of Geoscientists and Engineers | Paolo Gabrielli, Simon Drummie, Ewa Kaszycka, Steve Thompson, Yuxuan Zhan, Rory Hover, Sridhar Mannem, Monika Ubik, Nicolas Morandini, Peeyush Upadhyay, Benjamin Bosbach (CGG) ; M Shah B Sulaiman, Christopher Lee Slind (Petronas) ©2020 EAGE

Offshore Gabon has several challenges for seismic exploration. The major difficulty is obtaining a detailed and accurate velocity model. Complicated salt structures with overhangs, variability within the salt and carbonate rafts with Karst features pose difficult challenges to conventional velocity model building. Moreover, these ...

Download Resource
Technical Abstract

Multi-Well 4D DAS VSP: A Case Study at Mars Basin, Gulf of Mexico

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

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 ...

Download Resource
Technical Abstract

Optimal Transport FWI with Graph transform: Analysis and Proposal of a Partial Shift Strategy

EAGE - European Association of Geoscientists and Engineers | Felix Kpadonou, Jeremie Messud, Anna Sedova, Mathieu Reinier ©2021 EAGE

The use of graph-space optimal transport within foil-waveform inversion (FWI) has recently been proposed to enhance robustness to cycle-skipping. In this paper, we discuss several features of the graph-space optimal transport FWI, emphasizing in particular its ability to detect time shifts between modelled and ...

Download Resource
Share Link
LinkedIn icon Facebook icon Twitter icon