Full text loading...
-
Interferometry near Offset Synthesizing for Shallow Water Demultiple
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 78th EAGE Conference and Exhibition 2016, May 2016, Volume 2016, p.1 - 5
Abstract
Attenuation of shallow water multiples is one of the most challenging themes in the processing of reflection seismic data. Methods that are currently available, including deconvolution in various domains, SRME (Surface-Related Multiple Elimination), and PRT (Parabolic Radon Transform), tend to exhibit poor performance for data acquired in situations where the water bottom is extremely shallow. In this paper, we present a robust method to attenuate shallow water multiples via near offset synthesizing by seismic interferometry. From the real streamer data with the nearest offset of 105 m and water depth of 40 m, shorter offsets are successfully synthesized and reveal shallow reflections including dipping events which could not be imaged from the actual data. Thus, the predicted multiples by the SRME method using both the synthesized data and the actual data are more accurate than those using only the actual data, and the deep structures obscured by the shallow water multiples can be delineated more precisely. It is noted that application of the deconvolution process should be added since the proposed method cannot attenuate the internal multiples.