Deblending random seismic sources via independent component analysis

We consider the question of deblending for seismic shot records generated from simultaneous random sources at different locations, i.e., how to decompose them into isolated records involving one source at a time. As an example, seismic-while-drilling experiments use active drill-string sources and r...

Full description

Bibliographic Details
Main Authors: Pisupati, Pawan Bharadwaj (Contributor), Demanet, Laurent (Contributor), Fournier, Aime (Contributor)
Other Authors: Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences (Contributor), Massachusetts Institute of Technology. Department of Mathematics (Contributor)
Format: Article
Language:English
Published: Society of Exploration Geophysicists, 2018-06-12T14:04:46Z.
Subjects:
Online Access:Get fulltext
LEADER 02746 am a22002773u 4500
001 116240
042 |a dc 
100 1 0 |a Pisupati, Pawan Bharadwaj  |e author 
100 1 0 |a Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences  |e contributor 
100 1 0 |a Massachusetts Institute of Technology. Department of Mathematics  |e contributor 
100 1 0 |a Pisupati, Pawan Bharadwaj  |e contributor 
100 1 0 |a Demanet, Laurent  |e contributor 
100 1 0 |a Fournier, Aime  |e contributor 
700 1 0 |a Demanet, Laurent  |e author 
700 1 0 |a Fournier, Aime  |e author 
245 0 0 |a Deblending random seismic sources via independent component analysis 
260 |b Society of Exploration Geophysicists,   |c 2018-06-12T14:04:46Z. 
856 |z Get fulltext  |u http://hdl.handle.net/1721.1/116240 
520 |a We consider the question of deblending for seismic shot records generated from simultaneous random sources at different locations, i.e., how to decompose them into isolated records involving one source at a time. As an example, seismic-while-drilling experiments use active drill-string sources and receivers to look around and ahead of the borehole, but these receivers also record noise from the operation of the drill bit. A conventional method for deblending is independent component analysis (ICA), which assumes a "cocktail-party" mixing model where each receiver records a linear combination of source signals assumed to be statistically independent, and where only one source can have a Gaussian distribution. In this note, we extend the applicability of ICA to seismic shot records with markedly more complex mixing models with unknown wave kinematics, provided the following assumptions are met. 1. The active source is fully controllable, which means that it can be used to input a wide range of non-Gaussian random signals into the subsurface. 2. The waves are a linear function of the source, have a finite speed of propagation, and follow finite-length paths. The last assumption implies a scale separation, in frequency, between the mixing matrix elements (Green's functions) and the random input signals. In this regime, we show that the key to the success of ICA is careful windowing to frequency bands over which the Green's functions are approximately constant. 
520 |a Statoil ASA 
520 |a United States. Air Force. Office of Scientific Research (Grant FA9550- 12-1-0328) 
520 |a United States. Air Force. Office of Scientific Research (Grant FA9550-15-1-0078) 
520 |a National Science Foundation (U.S.) (Grant DMS-1255203) 
520 |a United States. Office of Naval Research (Grant N00014-16-1- 2122) 
655 7 |a Article 
773 |t SEG Technical Program Expanded Abstracts 2017