Least-squares reverse time migration of marine data with frequency-selection encoding

Handle URI:
http://hdl.handle.net/10754/626427
Title:
Least-squares reverse time migration of marine data with frequency-selection encoding
Authors:
Dai, Wei; Huang, Yunsong; Schuster, Gerard T. ( 0000-0001-7532-1587 )
Abstract:
The phase-encoding technique can sometimes increase the efficiency of the least-squares reverse time migration (LSRTM) by more than one order of magnitude. However, traditional random encoding functions require all the encoded shots to share the same receiver locations, thus limiting the usage to seismic surveys with a fixed spread geometry. We implement a frequency-selection encoding strategy that accommodates data with a marine streamer geometry. The encoding functions are delta functions in the frequency domain, so that all the en- coded shots have unique non-overlapping frequency content, and the receivers can distinguish the wavefield from each shot with a unique frequency band. Since the encoding functions are orthogonal to each other, there will be no crosstalk between different shots during modeling and migration. With the frequency-selection encoding method, the computational efficiency of LSRTM is increased so that its cost is compara- ble to conventional RTM for both the Marmousi2 model and a marine data set recorded in the Gulf of Mexico. With more iterations, the LSRTM image quality is further improved. We conclude that LSRTM with frequency-selection is an efficient migration method that can sometimes produce more focused images than conventional RTM.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program
Citation:
Dai W, Huang Y, Schuster GT (2013) Least-squares reverse time migration of marine data with frequency-selection encoding. SEG Technical Program Expanded Abstracts 2013. Available: http://dx.doi.org/10.1190/segam2013-0412.1.
Publisher:
Society of Exploration Geophysicists
Journal:
SEG Technical Program Expanded Abstracts 2013
Conference/Event name:
SEG Houston 2013 Annual Meeting, SEG 2013
Issue Date:
20-Aug-2013
DOI:
10.1190/segam2013-0412.1
Type:
Conference Paper
Additional Links:
http://library.seg.org/doi/abs/10.1190/segam2013-0412.1
Appears in Collections:
Conference Papers; Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorDai, Weien
dc.contributor.authorHuang, Yunsongen
dc.contributor.authorSchuster, Gerard T.en
dc.date.accessioned2017-12-26T11:57:20Z-
dc.date.available2017-12-26T11:57:20Z-
dc.date.issued2013-08-20en
dc.identifier.citationDai W, Huang Y, Schuster GT (2013) Least-squares reverse time migration of marine data with frequency-selection encoding. SEG Technical Program Expanded Abstracts 2013. Available: http://dx.doi.org/10.1190/segam2013-0412.1.en
dc.identifier.doi10.1190/segam2013-0412.1en
dc.identifier.urihttp://hdl.handle.net/10754/626427-
dc.description.abstractThe phase-encoding technique can sometimes increase the efficiency of the least-squares reverse time migration (LSRTM) by more than one order of magnitude. However, traditional random encoding functions require all the encoded shots to share the same receiver locations, thus limiting the usage to seismic surveys with a fixed spread geometry. We implement a frequency-selection encoding strategy that accommodates data with a marine streamer geometry. The encoding functions are delta functions in the frequency domain, so that all the en- coded shots have unique non-overlapping frequency content, and the receivers can distinguish the wavefield from each shot with a unique frequency band. Since the encoding functions are orthogonal to each other, there will be no crosstalk between different shots during modeling and migration. With the frequency-selection encoding method, the computational efficiency of LSRTM is increased so that its cost is compara- ble to conventional RTM for both the Marmousi2 model and a marine data set recorded in the Gulf of Mexico. With more iterations, the LSRTM image quality is further improved. We conclude that LSRTM with frequency-selection is an efficient migration method that can sometimes produce more focused images than conventional RTM.en
dc.publisherSociety of Exploration Geophysicistsen
dc.relation.urlhttp://library.seg.org/doi/abs/10.1190/segam2013-0412.1en
dc.rightsArchived with thanks to SEG Technical Program Expanded Abstracts 2013en
dc.titleLeast-squares reverse time migration of marine data with frequency-selection encodingen
dc.typeConference Paperen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentEarth Science and Engineering Programen
dc.identifier.journalSEG Technical Program Expanded Abstracts 2013en
dc.conference.date2011-09-22 to 2011-09-27en
dc.conference.nameSEG Houston 2013 Annual Meeting, SEG 2013en
dc.conference.locationHouston, TX, USAen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionWesternGeco, , United Kingdomen
kaust.authorHuang, Yunsongen
kaust.authorSchuster, Gerard T.en
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