3-D velocity structure from simultaneous traveltime inversion of in-line seismic data along intersecting profiles
A method for simultaneously inverting in-line seismic-traveltime data recorded along a network of intersecting linear profiles is presented. Consistency of the models at the intersection points is assured and permits 3-D structural and velocity variations to be inferred by interpolation between the...
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1994
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fthighwire:oai:open-archive.highwire.org:gji:118/3/795 2023-05-15T17:54:51+02:00 3-D velocity structure from simultaneous traveltime inversion of in-line seismic data along intersecting profiles Zelt, Colin A. 1994-09-01 00:00:00.0 text/html http://gji.oxfordjournals.org/cgi/content/short/118/3/795 https://doi.org/10.1111/j.1365-246X.1994.tb04001.x en eng Oxford University Press http://gji.oxfordjournals.org/cgi/content/short/118/3/795 http://dx.doi.org/10.1111/j.1365-246X.1994.tb04001.x Copyright (C) 1994, Oxford University Press Research Note TEXT 1994 fthighwire https://doi.org/10.1111/j.1365-246X.1994.tb04001.x 2016-11-16T17:19:20Z A method for simultaneously inverting in-line seismic-traveltime data recorded along a network of intersecting linear profiles is presented. Consistency of the models at the intersection points is assured and permits 3-D structural and velocity variations to be inferred by interpolation between the profiles. Common model parameters are used at the intersection points, thereby minimizing the number of independent model parameters and maximizing the degree of constraint of each 2-D model. The method has two main applications: (1) to obtain the most constrained set of 2-D models for each profile if subsequent 3-D modelling is not possible, and (2) to provide a 3-D starting model for subsequent 3-D modelling if there is sufficient azimuthal data coverage. Some ideal line geometries are suggested, but the method is applicable to any set of two or more lines with one or more intersection point. A new interpretation of crustal seismic data from the Peace River Arch region of the Western Canada Sedimentary Basin, consisting of four profiles, is presented using the simultaneous-inversion method for both refracted and reflected arrivals. The results are generally consistent with a previous interpretation of the data in which each profile was modelled independently of the others using 2-D forward modelling. However, the models obtained by inversion contain less lateral heterogeneity that more accurately reflects the resolution limits of the data. This illustrates the need to reconsider data that have only been analysed by forward modelling. Text Peace River HighWire Press (Stanford University) Canada Geophysical Journal International 118 3 795 801 |
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HighWire Press (Stanford University) |
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English |
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Research Note |
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Research Note Zelt, Colin A. 3-D velocity structure from simultaneous traveltime inversion of in-line seismic data along intersecting profiles |
topic_facet |
Research Note |
description |
A method for simultaneously inverting in-line seismic-traveltime data recorded along a network of intersecting linear profiles is presented. Consistency of the models at the intersection points is assured and permits 3-D structural and velocity variations to be inferred by interpolation between the profiles. Common model parameters are used at the intersection points, thereby minimizing the number of independent model parameters and maximizing the degree of constraint of each 2-D model. The method has two main applications: (1) to obtain the most constrained set of 2-D models for each profile if subsequent 3-D modelling is not possible, and (2) to provide a 3-D starting model for subsequent 3-D modelling if there is sufficient azimuthal data coverage. Some ideal line geometries are suggested, but the method is applicable to any set of two or more lines with one or more intersection point. A new interpretation of crustal seismic data from the Peace River Arch region of the Western Canada Sedimentary Basin, consisting of four profiles, is presented using the simultaneous-inversion method for both refracted and reflected arrivals. The results are generally consistent with a previous interpretation of the data in which each profile was modelled independently of the others using 2-D forward modelling. However, the models obtained by inversion contain less lateral heterogeneity that more accurately reflects the resolution limits of the data. This illustrates the need to reconsider data that have only been analysed by forward modelling. |
format |
Text |
author |
Zelt, Colin A. |
author_facet |
Zelt, Colin A. |
author_sort |
Zelt, Colin A. |
title |
3-D velocity structure from simultaneous traveltime inversion of in-line seismic data along intersecting profiles |
title_short |
3-D velocity structure from simultaneous traveltime inversion of in-line seismic data along intersecting profiles |
title_full |
3-D velocity structure from simultaneous traveltime inversion of in-line seismic data along intersecting profiles |
title_fullStr |
3-D velocity structure from simultaneous traveltime inversion of in-line seismic data along intersecting profiles |
title_full_unstemmed |
3-D velocity structure from simultaneous traveltime inversion of in-line seismic data along intersecting profiles |
title_sort |
3-d velocity structure from simultaneous traveltime inversion of in-line seismic data along intersecting profiles |
publisher |
Oxford University Press |
publishDate |
1994 |
url |
http://gji.oxfordjournals.org/cgi/content/short/118/3/795 https://doi.org/10.1111/j.1365-246X.1994.tb04001.x |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Peace River |
genre_facet |
Peace River |
op_relation |
http://gji.oxfordjournals.org/cgi/content/short/118/3/795 http://dx.doi.org/10.1111/j.1365-246X.1994.tb04001.x |
op_rights |
Copyright (C) 1994, Oxford University Press |
op_doi |
https://doi.org/10.1111/j.1365-246X.1994.tb04001.x |
container_title |
Geophysical Journal International |
container_volume |
118 |
container_issue |
3 |
container_start_page |
795 |
op_container_end_page |
801 |
_version_ |
1766162705185505280 |