Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Sergio Kostek"'
Publikováno v:
GEOPHYSICS. 63:809-815
We solve, numerically, the equations of elastodynamics that govern the propagation of waves in a fluid‐filled borehole intersected by one or more fluid‐filled fractures, thus extending earlier work on formations presumed to be rigid. The model is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::97603278d7f72e4dad2952e442c13e96
https://doi.org/10.1190/1.1444392
https://doi.org/10.1190/1.1444392
Publikováno v:
GEOPHYSICS. 63:800-808
We solve, numerically, the equations of elastodynamics that govern the propagation of waves in a fluid‐filled borehole intersected by one or more fluid‐filled fractures, thus extending earlier work on formations presumed to be rigid. The model is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::131c9a3c5b74667f45c9dd973db3de26
https://doi.org/10.1190/1.1444391
https://doi.org/10.1190/1.1444391
Publikováno v:
The Journal of the Acoustical Society of America. 102:3277-3289
The characteristics of tube waves in a borehole, with and without a solid cylindrical mandrel, which may be either elastic or poro-elastic, are compared. With an elastic mandrel, the tube waves are slower, more dispersive, and more sensitive to the f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96b0911bef9f89950d7c7069eba5a4a4
https://doi.org/10.1121/1.420390
https://doi.org/10.1121/1.420390
Publikováno v:
The Journal of Computational Finance. 1:63-79
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::772de9e4ca1d61358d5960e8075652fb
https://doi.org/10.21314/jcf.1997.004
https://doi.org/10.21314/jcf.1997.004
Publikováno v:
Scopus-Elsevier
A velocity-stress, finite difference formulation of acoustic waves in a fluid-filled, pressurized borehole yields synthetic waveforms for monopole or dipole sources before and after borehole pressurization. Processing of these waveforms using a varia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69981a51a7a9bd48af0e07f5c3da6ec5
https://doi.org/10.1029/96jb02724
https://doi.org/10.1029/96jb02724
Autor:
Sergio Kostek, Bikash K. Sinha
Publikováno v:
GEOPHYSICS. 61:1899-1907
A nonlinear elastic model for acoustic waves in a stressed medium is used to calculate tectonic stress‐induced changes in borehole flexural dispersions. Our theoretical analysis shows that a horizontal uniaxial stress in the formation causes a cros
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d518a2d8b03bd06ac4ee403dbdacfbd4
https://doi.org/10.1190/1.1444105
https://doi.org/10.1190/1.1444105
Publikováno v:
Journal of Geophysical Research: Solid Earth. 100:22375-22381
The propagation of Stoneley and flexural waves in a fluid-filled borehole is adequately described by the linear equations of elasticity. However, when the borehole fluid is pressurized either due to the hydrostatic head at a given depth or with the a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::381efa9f9e531bd63ee8062c3be45501
https://doi.org/10.1029/95jb02504
https://doi.org/10.1029/95jb02504
Publikováno v:
The Journal of the Acoustical Society of America. 98:1767-1777
Closed‐form analytic expressions are derived for the efficient calculation of the transient acoustic wave field emitted by a focused transducer with a spherical surface. The radiated transient acoustic wave field is evaluated by applying the Maggi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::409fe33cbe1100197bfb6c028f37dfe0
https://doi.org/10.1121/1.413441
https://doi.org/10.1121/1.413441
Autor:
David Linton Johnson, Sergio Kostek
Publikováno v:
The Journal of the Acoustical Society of America. 97:741-744
It is demonstrated that the Gardner theory of attenuation of extensional modes in porous fluid‐saturated cylinders is not the low frequency limit of the Biot theory in that geometry. The calculated attenuation within the Gardner approximation is mu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::892b916fce12271b73405ade132ea22b
https://doi.org/10.1121/1.412983
https://doi.org/10.1121/1.412983
Publikováno v:
Geophysical Journal International. 118:439-446
SUMMARY A heterogeneous medium composed of inviscid fluid and solid constituents is pre-stressed, resulting in relative slip of material particles at the interfaces between the solid and the fluid. The standard theory of acoustoelasticity, which is c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc030bd2314abd2b1cb134ccb4288324
https://doi.org/10.1111/j.1365-246x.1994.tb03975.x
https://doi.org/10.1111/j.1365-246x.1994.tb03975.x