Dispersion calculation method based on S-transform and coordinate rotation for Love channel waves with two components

• Autorzy: Feng L. , Zhang Y.

Identyfikatory

DOI

10.1007/s11600-017-0069-y

• Języki publikacji: EN

Abstrakty

EN

Dispersion analysis is an important part of in-seam seismic data processing, and the calculation accuracy of the dispersion curve directly influences pickup errors of channel wave travel time. To extract an accurate channel wave dispersion curve from in-seam seismic two-component signals, we proposed a time–frequency analysis method based on single-trace signal processing; in addition, we formulated a dispersion calculation equation, based on S-transform, with a freely adjusted filter window width. To unify the azimuth of seismic wave propagation received by a two-component geophone, the original in-seam seismic data undergoes coordinate rotation. The rotation angle can be calculated based on P-wave characteristics, with high energy in the wave propagation direction and weak energy in the vertical direction. With this angle acquisition, a two-component signal can be converted to horizontal and vertical directions. Because Love channel waves have a particle vibration track perpendicular to the wave propagation direction, the signal in the horizontal and vertical directions is mainly Love channel waves. More accurate dispersion characters of Love channel waves can be extracted after the coordinate rotation of two-component signals.

Słowa kluczowe

EN

dispersion; S-transform; two-component; coordinate rotation; channel wave

PL

dyspersja; transformata S

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2017
• Tom: Vol. 65, no. 4
• Strony: 757--764
• Opis fizyczny: Bibliogr. 24 poz.

Twórcy

autor

Feng L.

• School of Resources and Environments, Henan Polytechnic University, Jiaozuo, China
• Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Jiaozuo, China

autor

Zhang Y.

• Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Jiaozuo, China

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