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In search of the quantitative ground model: The good, the bad and the ugly

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Imperial College London - Royal School of Mines, Lecture Theatre 1.47

Prince Consort Rd

Kensington

London

SW7 2BP

United Kingdom

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In search of the quantitative ground model: The good, the bad and the ugly in site investigation

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Speaker

Mark Vardy, SAND Geophysics, www.sandgeophysics.com

Mark Vardy obtained an MPhys in Physics and Astronomy from the University of Southampton, before moving to the University of Southampton where he studied for an MRes and then a PhD in Marine Geophysics. After his PhD, he stayed on as a Research Fellow, before becoming a Principle Scientist for NERC. Mark has worked on all manner of offshore projects, from inshore infrastructure developments to large-scale offshore installations, and with clients including Shell, BP, TOTAL, De Beers, and National Grid. He specialises in the development of novel high-resolution geophysical solutions to marine near surface problems. He was a co-inventor of the 3D Chirp decimetre-resolution 3D seismic system, has designed a multi-channel seismic streamer suitable for ultra-high-resolution full waveform inversion, and developed two specialist seismic software packages specifically designed to provide optimal qualitative and quantitative imagery from high-resolution seismic reflection data. In particular, his development of machine learning workflows to predict geotechnical properties from seismic reflection data has garnered significant interest within the marine site survey sector. Mark also sits on the Shallow Marine Geophysics committee for EAGE, is an Associate Editor for Near Surface Geophysics, and has given invited, keynote speeches at both national and international conferences.

Abstract

Ground models underpin almost all offshore infrastructure projects, capturing the expected ground conditions such that risks can be effectively mitigated and structures designed with appropriate tolerances. In recent years, there has been a cultural shift towards more effective integration of data from the different disciplines involved (geological, geotechnical and geophysical), disciplines that historically would be isolated with little effective inter-communication. A key element of developing these so-called “quantitative ground models” is making greater use of all the available data, in particular the geophysical data. For site investigations, the results from a seismic reflection survey are often boiled down to a very basic, layer-cake stratigraphic model, disregarding all information regarding the intra-facies architecture and spatial variability. In this talk, we will look at some ways to quantitatively capture this information and effectively communicate it into later stages of the project cycle.

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Imperial College London - Royal School of Mines, Lecture Theatre 1.47

Prince Consort Rd

Kensington

London

SW7 2BP

United Kingdom

View Map

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