Microseismic imaging using a source-independent full-waveform inversion method

Handle URI:
http://hdl.handle.net/10754/625256
Title:
Microseismic imaging using a source-independent full-waveform inversion method
Authors:
Wang, Hanchen ( 0000-0001-8845-0820 )
Abstract:
Using full waveform inversion (FWI) to locate microseismic and image microseismic events allows for an automatic process (free of picking) that utilizes the full wavefield. However, waveform inversion of microseismic events faces incredible nonlinearity due to the unknown source location (space) and function (time). We develop a source independent FWI of microseismic events to invert for the source image, source function and the velocity model. It is based on convolving reference traces with the observed and modeled data to mitigate the effect of an unknown source ignition time. The adjoint-state method is used to derive the gradient for the source image, source function and velocity updates. The extended image for source wavelet in z axis is extracted to check the accuracy of the inverted source image and velocity model. Also the angle gather is calculated to see if the velocity model is correct. By inverting for all the source image, source wavelet and the velocity model, the proposed method produces good estimates of the source location, ignition time and the background velocity for part of the SEG overthrust model.
KAUST Department:
King Abdullah University of Science and Technology, , Saudi Arabia
Citation:
Wang H (2016) Microseismic imaging using a source-independent full-waveform inversion method. SEG Technical Program Expanded Abstracts 2016. Available: http://dx.doi.org/10.1190/segam2016-13946573.1.
Publisher:
Society of Exploration Geophysicists
Journal:
SEG Technical Program Expanded Abstracts 2016
Conference/Event name:
SEG International Exposition and 86th Annual Meeting, SEG 2016
Issue Date:
6-Sep-2016
DOI:
10.1190/segam2016-13946573.1
Type:
Conference Paper
Sponsors:
We thank KAUST for sponsoring this research. We also thank to the team of SWAG for their help during the research.
Additional Links:
http://library.seg.org/doi/10.1190/segam2016-13946573.1
Appears in Collections:
Conference Papers

Full metadata record

DC FieldValue Language
dc.contributor.authorWang, Hanchenen
dc.date.accessioned2017-07-26T06:19:10Z-
dc.date.available2017-07-26T06:19:10Z-
dc.date.issued2016-09-06en
dc.identifier.citationWang H (2016) Microseismic imaging using a source-independent full-waveform inversion method. SEG Technical Program Expanded Abstracts 2016. Available: http://dx.doi.org/10.1190/segam2016-13946573.1.en
dc.identifier.doi10.1190/segam2016-13946573.1en
dc.identifier.urihttp://hdl.handle.net/10754/625256-
dc.description.abstractUsing full waveform inversion (FWI) to locate microseismic and image microseismic events allows for an automatic process (free of picking) that utilizes the full wavefield. However, waveform inversion of microseismic events faces incredible nonlinearity due to the unknown source location (space) and function (time). We develop a source independent FWI of microseismic events to invert for the source image, source function and the velocity model. It is based on convolving reference traces with the observed and modeled data to mitigate the effect of an unknown source ignition time. The adjoint-state method is used to derive the gradient for the source image, source function and velocity updates. The extended image for source wavelet in z axis is extracted to check the accuracy of the inverted source image and velocity model. Also the angle gather is calculated to see if the velocity model is correct. By inverting for all the source image, source wavelet and the velocity model, the proposed method produces good estimates of the source location, ignition time and the background velocity for part of the SEG overthrust model.en
dc.description.sponsorshipWe thank KAUST for sponsoring this research. We also thank to the team of SWAG for their help during the research.en
dc.publisherSociety of Exploration Geophysicistsen
dc.relation.urlhttp://library.seg.org/doi/10.1190/segam2016-13946573.1en
dc.rightsArchived with thanks to SEG Technical Program Expanded Abstracts 2016en
dc.titleMicroseismic imaging using a source-independent full-waveform inversion methoden
dc.typeConference Paperen
dc.contributor.departmentKing Abdullah University of Science and Technology, , Saudi Arabiaen
dc.identifier.journalSEG Technical Program Expanded Abstracts 2016en
dc.conference.date2011-10-16 to 2011-10-21en
dc.conference.nameSEG International Exposition and 86th Annual Meeting, SEG 2016en
dc.conference.locationDallas, TX, USAen
dc.eprint.versionPublisher's Version/PDFen
kaust.authorWang, Hanchenen
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