Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Henri-Pierre Valero"'
Publikováno v:
IEEE Transactions on Computational Imaging. 3:330-343
This paper presents a novel approach for computationally efficient and robust compression for Ultrasonic Borehole Imaging. Although current methods achieve good compression versus accuracy tradeoffs, they inevitably employ iterative schemes, which fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::500e044efb7d366cd3a31370bde6cad8
https://doi.org/10.1109/tci.2017.2670366
https://doi.org/10.1109/tci.2017.2670366
Publikováno v:
2018 IEEE International Ultrasonics Symposium (IUS).
The drilling operation can be complex depending on well trajectory and types of the formation to be drilled. In a highly deviated well, drilling parameters require careful assessment while drilling to minimize risks of serious drilling hazards. Ultra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a7428f4baeaa4aa2d2a280828fbe3d9
https://doi.org/10.1109/ultsym.2018.8579741
https://doi.org/10.1109/ultsym.2018.8579741
Publikováno v:
IEEE Transactions on Signal Processing. 63:3062-3075
In this paper, we present methods and strategies for robust detection and slowness estimation of weak compressional (P) and shear (S) waves in borehole sonic logging in noisy environments such as while logging while drilling, by proposing methods for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23bf3b274b675f51298a47edd136d7bb
https://doi.org/10.1109/tsp.2015.2420540
https://doi.org/10.1109/tsp.2015.2420540
Autor:
Takeshi Endo, Erik Wielemaker, Shinichi Sunaga, Henri-Pierre Valero, Kentaro Torii, John Adam Donald
Publikováno v:
SEG Technical Program Expanded Abstracts 2016.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1cc6cdee40437f89e9e0fb2a394e5507
https://doi.org/10.1190/segam2016-13880697.1
https://doi.org/10.1190/segam2016-13880697.1
Publikováno v:
Geophysical Journal International. 183:1005-1013
SUMMARY This paper describes a new algorithm based on the spectral method for the computation of Stoneley wave dispersion and attenuation propagating in cylindrical structures composed of fluid, elastic and poroelastic layers. The spectral method is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::183db7624a7e2deb5f19977130d13b3a
https://doi.org/10.1111/j.1365-246x.2010.04773.x
https://doi.org/10.1111/j.1365-246x.2010.04773.x
Publikováno v:
GEOPHYSICS. 75:H19-H27
A new spectral-method algorithm can be used to study wave propagation in cylindrically layered fluid and elastic structures. The cylindrical structure is discretized with Chebyshev points in the radial direction, whereas differentiation matrices are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b92cfbadae507576f8a54eff82c633a0
https://doi.org/10.1190/1.3380590
https://doi.org/10.1190/1.3380590
Publikováno v:
IEEE Transactions on Instrumentation and Measurement. 50:1404-1412
In this paper, we develop viscoacoustic asymptotic waveform inversion to estimate velocity and attenuation factor Q of a medium. Then, we present an application to laboratory ultrasonic data. Viscoacoustic asymptotic waveform inversion is performed u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84021eff6b3c3b794e1223b5533a1932
https://doi.org/10.1109/19.963217
https://doi.org/10.1109/19.963217
Autor:
Gilles Lambaré, Dominique Gibert, Henri-Pierre Valero, Alessandra Ribodetti, Jean Virieux, Stéphane Operto
Publikováno v:
Geophysical Journal International (0956-540X) (Blackwell Science Ltd), 2000-02, Vol. 140, N. 2, P. 324-340
Summary This paper presents an application of 2.5-D asymptotic viscoacousti c diffraction tomography to ultrasonic data recorded during a physically scaled laboratory experiment. This scaled experiment was used to test the reliability of our method w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b451f22db830780fe812c90b7c652280
https://doi.org/10.1046/j.1365-246x.2000.00015.x
https://doi.org/10.1046/j.1365-246x.2000.00015.x
Publikováno v:
Day 2 Tue, October 01, 2013.
Cementing is an essential part of well construction as it supports the casing and provides hydraulic sealing. Quantitative cement evaluation is becoming increasingly important in the industry to verify well integrity and zonal isolation. Such informa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3316612847687e04e580c6c5641d2d0
https://doi.org/10.2118/166327-ms
https://doi.org/10.2118/166327-ms
Publikováno v:
2013 IEEE International Ultrasonics Symposium (IUS).
A Novel down-hole seismic source have been designed and tested to explore formations properties surrounding a borehole. The energy sent into the formation was optimized by clamping the radiating devices of the tool against the borehole wall, allowing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::219a13781971822f4cc36fb0d75b07b3
https://doi.org/10.1109/ultsym.2013.0478
https://doi.org/10.1109/ultsym.2013.0478