Patent ID: 8605541
Filing Date: 2013-12-10
Classification: G01V

Abstract:
1. A method of de-ghosting seismic data, comprising the steps of: using a multicomponent streamer to measure a vertical particle velocity and a pressure in a fluid medium; converting the acquired vertical component of particle velocity to a vertical pressure gradient using the equation of motion: where: ω is the angular frequency, ρ is the density of water, and v determining a second-order cross-line derivative of pressure for marine seismic wavefield data that takes into account three dimensional effects on the marine seismic wavefield data from the measured vertical particle velocity, the vertical pressure gradient and the pressure, wherein the second-order cross-line derivative of pressure is determined according to the equation: where: p is the pressure, k=ω/c, ω is the angular frequency, c is the velocity in water, ρ is the density of water, h is the instantaneous wave-height at each hydrophone location as a function of time (needs to be implemented in the time domain), and O(h using the determined second-order cross-line derivative of pressure in a process to decompose the seismic wavefield data; and using the decomposed seismic wavefield to generate an image of a section of an interior of the Earth.