Patent ID: 9726769
Date: 2017-08-08
CPC Classifications: G01V

Claim:
1. A method of separating seismic sources, comprising the steps of: a) providing at least two vibratory sources and two or more receivers, wherein said vibratory sources are each capable of generating a sweep of vibrations into the ground; b) performing a sweep of vibrations into the ground by said vibratory sources and concurrently recording a setup field data from each of said vibratory sources using each of said receivers, wherein an initial Ground Force Estimate (GFE) specific to each of said vibratory sources is obtained; c) performing iterative inversion for the setup field data from each of said vibratory sources using said initial GFE as preliminary input to obtain inverted setup field data; d) separating said inverted setup field data to obtain a shot record for each of said receivers from each of said vibratory sources, wherein for each said vibratory source the number of said shot records is the same as the number of said receivers; e) comparing and differentiating said shot records of the same vibratory source to yield a crosstalk modifier; f) modifying the initial GFE using said crosstalk modifier to obtain an improved derived GFE; and g) repeating steps b) to c) using said derived GFE instead of said initial GFE to minimize cross talk and obtain a final seismic data record and an optimized derived GFE.