Results 31 to 40 of about 27,306 (237)

Impact of Shale Anisotropy on Seismic Wavefield

Energies, 2019
During unconventional resources exploration, ignoring shale anisotropy may lead to wrong seismic interpretations, thus affecting the accuracy and credibility of sweet spots prediction and reservoir characterization.
Han Li, Xiwu Liu, Xu Chang, Ruyue Wu, Jiong Liu   +4 more
doaj   +1 more source

Seismic anisotropy in overburden [PDF]

SEG Technical Program Expanded Abstracts 2005, 2005
Seismic anisotropy produced by shales and fine shale/sandstone sequences in overburden is analyzed by using laboratory data. qP-wave anisotropy is weak for small propagation angles ( 0 30 about θ ). qSV-wave anisotropy is strong in moderate propagation angles ( 0 0 0 7 about 20 about < < θ ).
openaire   +2 more sources

Firn seismic anisotropy in the Northeast Greenland Ice Stream from ambient-noise surface waves [PDF]

The Cryosphere
We analyse ambient-noise seismic data from 23 three-component seismic nodes to study firn velocity structure and seismic anisotropy near the EastGRIP camp along the Northeast Greenland Ice Stream (NEGIS).
E. Pearce, D. Zigone, C. Hofstede, A. Fichtner, J. Rimpot, S. O. Rasmussen, J. Freitag, O. Eisen, O. Eisen, O. Eisen   +9 more
doaj   +1 more source

Automatic Reconstruction of Fault Networks from Seismicity Catalogs: 3D Optimal Anisotropic Dynamic Clustering [PDF]

, 2007
We propose a new pattern recognition method that is able to reconstruct the 3D structure of the active part of a fault network using the spatial location of earthquakes.
Bhattacharya, Bishop, Bottou, Bradley, C. Ducorbier, Cohen, D. Sornette, Darrozes, Duda, Duda, Faulkner, G. Ouillon, Gaillot, Gaillot, Gaillot, Grégoire, Guzofski, Hamerly, Jones, Kanungo, Likas, Liu, MacQueen, Nicholson, Ouillon, Ouillon, Ouillon, Pelleg, Plesch, Press, Sarti, Scholz, Shearer, Shearer, Steacy, Wesson, Zhang   +36 more
core   +3 more sources

Seismic anisotropy at Hydrate Ridge [PDF]

Geophysical Research Letters, 2006
P‐wave velocity increases in the presence of gas hydrates and decreases in the presence of free gas in the sediments, making it an excellent means to investigate gas hydrate systems. However, seismic velocity is typically derived from surface seismic data without consideration of seismic anisotropy.
Dhananjay Kumar, Mrinal K. Sen, Nathan L. Bangs, Chengshu Wang, Ingo Pecher   +4 more
openaire   +1 more source

Sharp Changes of Crustal Seismic Anisotropy Across the Central Tanlu Fault Zone in East China

Geophysical Research Letters, 2023
Both seismic and geodetic data suggested that the ∼120‐km long Weifang segment of the Tanlu fault zone, a large‐scale active strike‐slip system at east China, is a seismic gap with no obvious along‐strike shear motion at surface.
Wenpei Miao, Fenglin Niu, Haichao Chen
doaj   +1 more source

Shear-Wave Splitting and Mantle Flow Beneath the Colorado Plateau and its Boundary with the Great Basin [PDF]

, 2008
Shear-wave splitting measurements from SKS and SKKS phases show fast polarization azimuths that are subparallel to North American absolute plate motion within the central Rio Grande Rift (RGR) and Colorado Plateau (CP) through to the western rim of the ...
Aster, Richard, Baldridge, W. Scott, Grand, Stephen P., Ni, James F., Sandvol, Eric, Sine, Christopher, Wang, Xinling L., Wilson, David   +7 more
core   +1 more source

Influence of Error in Estimating Anisotropy Parameters on VTI Depth Imaging

International Journal of Geophysics, 2016
Thin layers in sedimentary rocks lead to seismic anisotropy which makes the wave velocity dependent on the propagation angle. This aspect causes errors in seismic imaging such as mispositioning of migrated events if anisotropy is not accounted for.
S. Y. Moussavi Alashloo, D. P. Ghosh, Y. Bashir, W. Y. Wan Ismail   +3 more
doaj   +1 more source

Ab initio study of the elastic behavior of MgSiO3 ilmenite at high pressure [PDF]

, 2002
We investigate the athermal high pressure behavior of the elastic properties of MgSiO3 ilmenite up to 30 GPa using the ab initio pseudopotential method. Our results at zero pressure are in good agreement with single-crystal elasticity measurements.
Da Silva, CRS, Karki, BB, Stixrude, L, Wentzcovitch, RM   +3 more
core   +1 more source

Detecting Compaction Disequilibrium with Anisotropy of Magnetic Susceptibility [PDF]

, 2006
In clay-rich sediment, microstructures and macrostructures influence how sediments deform when under stress. When lithology is fairly constant, anisotropy of magnetic susceptibility (AMS) can be a simple technique for measuring the relative consolidation
Bennett, Booth, Borrero, Bray, Constable, Dorman, Driscoll, Dugan, Edwards, Eichhubl, Field, Fischer, Fisher, Fisher, Geiss, Hendy, Hext, Hill, Homa Lee, Housen, Hu, Jelinek, Karlin, Kawamura, Kayen, King, Kirschvink, Kodama, Kopf, Kumar, Kurt Schwehr, Lambe, Lee, Leslie, Leslie, Lisa Tauxe, Liu, Locat, Marks, Marsaglia, McCabe, Mello, Neal Driscoll, O'Leary, Oey, Pan, Reimers, Riedinger, Rowan, Schlee, Schock, Schwehr, Shaw, Snowball, Soutar, Spinelli, Stephenson, Tarduno, Tarling, Tauxe, Tauxe, Thunell, Ward, Warrick   +63 more
core   +3 more sources