Zobrazeno 1 - 10 of 48 pro vyhledávání: '"Ed Kragh"'
1
Seismic wavefield divergence at the free surface
Autor: Everhard Muyzert, Nihed El Allouche, Ed Kragh, Nicolas Goujon, Pascal Edme
Publikováno v: First Break. 36:75-82
This paper explores the concept of pressure measurements in a land seismic acquisition setting. We first review the theory for pressure measurements near the surface of the Earth and show the significance of the S-to-P conversion which results in the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9d62a1e5529dc77b11984c4c8ca26571
https://doi.org/10.3997/1365-2397.2018008
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2
Marine vibrators: the new phase of seismic exploration
Autor: David Halliday, Ed Kragh, T. Murray, Robert Laws, David Gerez, Mehul Supawala, J.-F. Hopperstad, Ali Özbek
Publikováno v: Geophysical Prospecting. 67:1443-1471
Marine seismic vibrators are generally considered to be less intrusive than airguns from an environmental perspective. This is because they emit their energy spread out in time, rather than in a single, high‐intensity pulse. There are also signific
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e923ca1a548abf1a64e8c71fe15347a4
https://doi.org/10.1111/1365-2478.12708
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3
Imaging with Near-Field Hydrophones
Autor: Shanice Mohammed, Ed Kragh, Kevin Davies, Krzysztof Ubik, Pete Nevill, Philip A. F. Christie, Richard Jupp
Publikováno v: 81st EAGE Conference and Exhibition 2019 Workshop Programme.
Near Field Hydrophone (NFH) data are routinely collected during marine acquisition and historically these data were used to QC air-gun timings and/or other air-gun-related issues. More recently (last 10-15 years), these data were recorded and employe
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a2deef00e05baee5efc69821ef5fe123
https://doi.org/10.3997/2214-4609.201901945
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4
Distributed vibration sensing for seismic acquisition
Autor: Tim Brice, Daniele Molteni, Ed Kragh, Arthur H. Hartog, Kevin O'Connell, Tim Dean
Publikováno v: The Leading Edge. 35:600-604
Distributed vibration sensing (DVS), also known as distributed acoustic sensing (DAS), is a relatively new method for recording seismic data using a standard fiber-optic cable as the sensor. Although the dynamic range and noise floor of DVS systems a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::49eacd03d951bfafce1cdc212e432a6f
https://doi.org/10.1190/tle35070600.1
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5
Scattered ground-roll attenuation using model-driven interferometry
Autor: John Quigley, Lee West, Ed Kragh, Phil Bilsby, David Halliday
Publikováno v: Geophysical Prospecting. 63:116-132
Scattered ground roll is a type of noise observed in land seismic data that can be particularly difficult to suppress. Typically, this type of noise cannot be removed using conventional velocity-based filters. In this paper, we discuss a model-driven
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b2d301509c1af900b5234dfcb0a84950
https://doi.org/10.1111/1365-2478.12165
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6
Fidelity and repeatability of wave fields reconstructed from multicomponent streamer data
Autor: Dirk-Jan van Manen, Ali Özbek, Ed Kragh, Everhard Muyzert, Philip A. F. Christie, Massimiliano Vassallo, Kurt Eggenberger
Publikováno v: Geophysical Prospecting. 62:994-1008
Wave field reconstruction – the estimation of a three-dimensional (3D) wave field representing upgoing, downgoing or the combined total pressure at an arbitrary point within a marine streamer array – is enabled by simultaneous measurements of the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::97271199f5c21685d02f31cefb444275
https://doi.org/10.1111/1365-2478.12112
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7
On the use of a seismic sensor as a seismic source
Autor: Johan O. A. Robertsson, David Halliday, Taiwo Fawumi, Ed Kragh
Publikováno v: GEOPHYSICS. 78:A39-A43
We investigated the use of seismic sensors as small seismic sources. A voltage signal is applied to a geophone that forces the mass within the geophone to move. The movement of the mass generates a seismic wavefield that was recorded with an array of
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea6783ade15979706dbaeccf1a6a25de
https://doi.org/10.1190/geo2013-0084.1
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8
Attenuation of free-surface multiples by up/down deconvolution for marine towed-streamer data
Autor: Ed Kragh, Ian Moore, Joachim Mispel, Mark Thompson, Clement Kostov, Mariusz Majdański
Publikováno v: GEOPHYSICS. 76:V129-V138
Free-surface-related multiples in marine seismic data are commonly attenuated using adaptive subtraction of the predicted multiple energy. An alternative method, based on deconvolution of the upgoing wavefield by the downgoing wavefield, was previous
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4dc0ac41cebca563cb28423d0c268c7d
https://doi.org/10.1190/geo2010-0337.1
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10
Efficient broadband marine acquisition and processing for improved resolution and deep imaging
Autor: Everhard Muyzert, Ed Kragh, Deepak Kapadia, Morten Svendsen, Tony Curtis
Publikováno v: The Leading Edge. 29:464-469
Summary We present a new method for broadband marine acquisition and processing. A 3D shallow towed-streamer spread is deployed, designed to optimize the mid- and high-frequency parts of the bandwidth. In addition, data are simultaneously acquired fr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::136c9666c49455f2f836160f8f5e5b9c
https://doi.org/10.1190/1.3378309
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