Numerical Simulation of Near-Field Seismoacoustic Probing of a Layer Inclusion in a Homogeneous Infinite Medium
ABSTRACT
Spatial distribution of acoustic and elastic waves generated by an elementary vibration source at seismic profiling frequencies in an infinite medium close to a layer inclusion, i.e., an extended layer, is numerically simulated. Point dipole radiation in a homogeneous infinite medium separated by a liquid layer of different medium density or acoustic wave velocity is considered. Transverse elastic SH-waves excited by an oscillating power source in a solid medium also located close to the layer of different propagation velocity than the velocity of the vicinity are analyzed. Formulae for the spatial distribution of the wave field amplitude are derived and computer graphics of field distribution images is presented. Wave reflection, penetration deep into the layer inclusion, and transmittance through it are examined. Results of the analysis can be applied to seismoacoustic probing of geologic environment by the near field of a harmonic vibration source.
Spatial distribution of acoustic and elastic waves generated by an elementary vibration source at seismic profiling frequencies in an infinite medium close to a layer inclusion, i.e., an extended layer, is numerically simulated. Point dipole radiation in a homogeneous infinite medium separated by a liquid layer of different medium density or acoustic wave velocity is considered. Transverse elastic SH-waves excited by an oscillating power source in a solid medium also located close to the layer of different propagation velocity than the velocity of the vicinity are analyzed. Formulae for the spatial distribution of the wave field amplitude are derived and computer graphics of field distribution images is presented. Wave reflection, penetration deep into the layer inclusion, and transmittance through it are examined. Results of the analysis can be applied to seismoacoustic probing of geologic environment by the near field of a harmonic vibration source.
KEYWORDS
Seismoacoustic Probing, Vibration Source, Acoustic, Transverse Waves, Wave Field Amplitudes, Spatial Distribution, Inhomogeneity
Seismoacoustic Probing, Vibration Source, Acoustic, Transverse Waves, Wave Field Amplitudes, Spatial Distribution, Inhomogeneity
Cite this paper
nullY. Zaslavsky and V. Zaslavsky, "Numerical Simulation of Near-Field Seismoacoustic Probing of a Layer Inclusion in a Homogeneous Infinite Medium," Journal of Modern Physics, Vol. 1 No. 2, 2010, pp. 110-123. doi: 10.4236/jmp.2010.12017.
nullY. Zaslavsky and V. Zaslavsky, "Numerical Simulation of Near-Field Seismoacoustic Probing of a Layer Inclusion in a Homogeneous Infinite Medium," Journal of Modern Physics, Vol. 1 No. 2, 2010, pp. 110-123. doi: 10.4236/jmp.2010.12017.
References
[1] A. M. Derzhavin, O. V. Kudryavtsev and A. G. Semenov, “On Peculiarities of Numerical Simulation of a Vector Wave Field of a Low-Frequency Acoustic Source in the Ocean Medium,” Akusticheskii Zhurnal, Vol. 46, No. 4, 2000, pp. 480-489. [2] L. A. Bespalov, A. M. Derzhavin and O. V. Kudryavtsev, “On Simulation of a Seismoacoustic Field of a Low- Frequency Source for Variation in the Structure of Ocean Bottom Thickness,” Akusticheskii Zhurnal, Vol. 45, No.1, 1999, pp. 25-37. [3] L. M. Brekhovskikh, “Waves in Layered Media,” Nauka, Moscow, 1973, p. 343. [4] Y. M. Zaslavsky and V. Y. Zaslavsky, “Analysis of a Vibroacoustic Field in an Extended Layer and a Layer- Semispace Structure,” Izvestiya Vysshikh Uchebnykh Za-vedenii, Radiofizika, Vol. 7, No. 2, 2009, pp. 151-163. [5] Y. M. Zaslavsky and V. Y. Zaslavsky, “Analysis of an Acoustic Field Excited by a Vibration Source in a Layer and its Vicinity,” Akusticheskii Zhurnal, Vol. 55, No. 6, 2009, pp. 845-852. [6] Y. M. Zaslavsky and V. Y. Zaslavsky, “Transverse Waves Excited by a Variable Power Source in a Layer and its Vi-cinity,” NNGU Vestnik, Radiofizika, 2009, No. 5, pp. 61-68. [7] Y. M. Zaslavsky, B. V. Kerzhakov and V. V. Kulinich, “Vertical Seismic Profiling on a Sea Shelf,” Akusticheskii Zhurnal, Vol. 54, No. 3, 2008, pp. 483-490. [8] Y. M. Zaslavsky, B. V. Kerzhakov and V. V. Kulinich, “Simulation of Wave Radiation and Phased Antenna Re-ception on the Ocean Shelf,” Akusticheskii Zhurnal, Vol. 53, No. 2, 2007, pp. 264-273. [9] J. L. Arroyo, P. Breton, H. Dijkerman, et al. “Superior Seismic Data from the Borehole,” Oilfield Review, Vol. 15, No. 1, 2003, pp. 1-23.
[1] A. M. Derzhavin, O. V. Kudryavtsev and A. G. Semenov, “On Peculiarities of Numerical Simulation of a Vector Wave Field of a Low-Frequency Acoustic Source in the Ocean Medium,” Akusticheskii Zhurnal, Vol. 46, No. 4, 2000, pp. 480-489. [2] L. A. Bespalov, A. M. Derzhavin and O. V. Kudryavtsev, “On Simulation of a Seismoacoustic Field of a Low- Frequency Source for Variation in the Structure of Ocean Bottom Thickness,” Akusticheskii Zhurnal, Vol. 45, No.1, 1999, pp. 25-37. [3] L. M. Brekhovskikh, “Waves in Layered Media,” Nauka, Moscow, 1973, p. 343. [4] Y. M. Zaslavsky and V. Y. Zaslavsky, “Analysis of a Vibroacoustic Field in an Extended Layer and a Layer- Semispace Structure,” Izvestiya Vysshikh Uchebnykh Za-vedenii, Radiofizika, Vol. 7, No. 2, 2009, pp. 151-163. [5] Y. M. Zaslavsky and V. Y. Zaslavsky, “Analysis of an Acoustic Field Excited by a Vibration Source in a Layer and its Vicinity,” Akusticheskii Zhurnal, Vol. 55, No. 6, 2009, pp. 845-852. [6] Y. M. Zaslavsky and V. Y. Zaslavsky, “Transverse Waves Excited by a Variable Power Source in a Layer and its Vi-cinity,” NNGU Vestnik, Radiofizika, 2009, No. 5, pp. 61-68. [7] Y. M. Zaslavsky, B. V. Kerzhakov and V. V. Kulinich, “Vertical Seismic Profiling on a Sea Shelf,” Akusticheskii Zhurnal, Vol. 54, No. 3, 2008, pp. 483-490. [8] Y. M. Zaslavsky, B. V. Kerzhakov and V. V. Kulinich, “Simulation of Wave Radiation and Phased Antenna Re-ception on the Ocean Shelf,” Akusticheskii Zhurnal, Vol. 53, No. 2, 2007, pp. 264-273. [9] J. L. Arroyo, P. Breton, H. Dijkerman, et al. “Superior Seismic Data from the Borehole,” Oilfield Review, Vol. 15, No. 1, 2003, pp. 1-23.