Patent Document ID: 20130182535
Application ID: 13739489
Patent Flag: 0

Claim One:
1. A method for substantially eliminating an influence of internal multiple reflections in determining undersea geography in a geographical area of interest without a priori knowledge of subsurface information, the method comprising: (a) generating a series of seismic signals by a plurality of source transmitters; (b) receiving raw data at a plurality of receivers based on the generated series of seismic signals; (c) creating a set of M windows that corresponds physically to a space below the plurality of receivers and includes a geographical area of interest; (d) assigning received raw data to respective ones of the set of windows based on received time of the raw data, to generate M window data frames, wherein a first uppermost window data frame incorporates raw data that corresponds to an uppermost wavefield closest to the plurality of receivers, and an M th window data frame incorporates raw data that corresponds to a lowermost wavefield farthest from the plurality of receivers; (e) iteratively generating an internal multiple model, using a sliding set of three window data frames, wherein for each iteration, wherein the internal multiple model includes a first product of a convolution of data from a first window data frame and a second window date frame, and a correlation of data from a third window data frame with the first product; (f) summing all of the iteratively generated internal multiple models to create a complete internal multiple model, and continuing the summing until all of the window data frames have been used; and (g) subtracting the complete internal multiple model from the raw data to substantially eliminate the influence of internal multiples in determining the geography of the geographical area of interest.