×

Method for attenuation of multiple reflections in seismic data

  • US 7,675,812 B2
  • Filed: 06/30/2008
  • Issued: 03/09/2010
  • Est. Priority Date: 06/30/2008
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for separating multiple reflections from marine seismic signals, comprising on a computer:

  • coherency filtering the seismic signals, the seismic signals acquired from a plurality of seismic sensors deployed in a body of water in response to actuation of a seismic energy source in the water;

    low pass filtering the seismic signals at a selected frequency;

    high pass filtering the seismic signals at the selected frequency, the frequency selected such that substantially only multiple reflections exist in the seismic signals above the frequencygenerating a mask having unity value where the high pass filtered signal amplitude exceeds a selected threshold, the mask having zero value for all other high pass filtered signals;

    multiplying the mask value by the low pass filtered signals;

    adding the multiplied signals to the high pass filtered signals to generate a model of the multiple reflections;

    subtracting the multiple reflection model from the coherency filtered seismic signals; and

    at least one of storing and displaying a result of the subtracting.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×