1887
Volume 33 Number 7
  • E-ISSN: 1365-2478

Abstract

A

In combined P‐ and SV‐observations with vertical and in‐line horizontal geophones, recognition and separation of the individual P‐ and S‐arrivals may form a considerable problem. Due to the geophone receiving characteristics, P‐ and S‐waves are observed on both horizontal and vertical geophones. A new method of separating P‐ and S‐waves is presented that inverts the geophone records for the receiving characteristics, thereby separating the two wavetypes.

The filter coefficients are determined from the near‐surface P‐ and S‐wave velocity and from the geometry of the geophone groups. The P/S‐separation filter was tested on synthetic data with good results. Even PS‐ and SP‐converted reflections, which are completely coinciding for horizontal reflectors, could be well separated. The filter appears to be stable and to have low sensitivity to noise in the data or to errors in the near‐surface P‐ and S‐wave velocity. The filter is superior to other separation methods, which were applied to the same dataset for comparison. This method can also be applied to VSP data.

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2006-04-27
2024-03-28
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  • Article Type: Research Article

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