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METHOD AND DEVICE FOR WAVE FIELDS SEPARATION IN SEISMIC DATA

  • US 20130021873A1
  • Filed: 07/18/2011
  • Published: 01/24/2013
  • Est. Priority Date: 07/18/2011
  • Status: Active Grant
First Claim
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1. A method for ZX separating up-going and down-going wave fields in seismic data related to a subsurface of a body of water, the method comprising:

  • receiving as input vertical and radial components, wherein the vertical component is related to a particle velocity measured along a depth direction relative to a surface of the water and the radial component is related to the particle velocity measured along a radial direction parallel to the surface of the water and substantially perpendicular to the depth direction and the radial direction and the vertical direction define a plane in which the wave fields propagate;

    applying a radon transform to the vertical and radial components to transform the vertical and radial components from a time-distance domain to a tau-apparent slowness domain, wherein the apparent slowness is the sine of an incidence angle divided by a speed of the wave fields in water;

    calculating the up-going wave fields as a first combination of the radon transformed vertical and radial components multiplied by a scaling factor;

    calculating the down-going wave fields as a second combination of the radon transformed vertical and radial components multiplied by the scaling factor; and

    applying an inverse radon transform to the up-going wave fields and the down-going wave fields to obtain up-going wave fields and down-going wave fields in the time-distance domain.

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