The effect of velocity uncertainty on migrated reflectors: Improvements from relative-depth imaging
We have studied the problem of uncertainty quantification for migrated images. A traditional migrated image contains deterministic reconstructions of subsurface structures. However, input parameters used in migration, such as reflection data and a velocity model, are inherently uncertain. This uncer...
| Main Authors: | , |
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| Format: | Article |
| Language: | en_US |
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Society of Exploration Geophysicists
2016
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| Online Access: | http://hdl.handle.net/1721.1/100940 |
| _version_ | 1826216995043934208 |
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| author | Poliannikov, Oleg V. Malcolm, Alison E. |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Poliannikov, Oleg V. Malcolm, Alison E. |
| author_sort | Poliannikov, Oleg V. |
| collection | MIT |
| description | We have studied the problem of uncertainty quantification for migrated images. A traditional migrated image contains deterministic reconstructions of subsurface structures. However, input parameters used in migration, such as reflection data and a velocity model, are inherently uncertain. This uncertainty is carried through to the migrated images. We have used Bayesian analysis to quantify the uncertainty of the migrated structures by constructing a joint statistical distribution of the location of these structures. From this distribution, we could deduce the uncertainty in any quantity derived from these structures. We have developed the proposed framework using a simple model with velocity uncertainty in the overburden, and we estimated the absolute positions of the horizons and the relative depth of one horizon with respect to another. By quantifying the difference in the corresponding uncertainties, we found that, in this case, the relative depths of the structures could be estimated much better than their absolute depths. This analysis justifies redatuming below an uncertain overburden for the purposes of the uncertainty reduction. |
| first_indexed | 2024-09-23T16:56:23Z |
| format | Article |
| id | mit-1721.1/100940 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:56:23Z |
| publishDate | 2016 |
| publisher | Society of Exploration Geophysicists |
| record_format | dspace |
| spelling | mit-1721.1/1009402022-10-03T09:16:57Z The effect of velocity uncertainty on migrated reflectors: Improvements from relative-depth imaging Poliannikov, Oleg V. Malcolm, Alison E. Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Poliannikov, Oleg V. We have studied the problem of uncertainty quantification for migrated images. A traditional migrated image contains deterministic reconstructions of subsurface structures. However, input parameters used in migration, such as reflection data and a velocity model, are inherently uncertain. This uncertainty is carried through to the migrated images. We have used Bayesian analysis to quantify the uncertainty of the migrated structures by constructing a joint statistical distribution of the location of these structures. From this distribution, we could deduce the uncertainty in any quantity derived from these structures. We have developed the proposed framework using a simple model with velocity uncertainty in the overburden, and we estimated the absolute positions of the horizons and the relative depth of one horizon with respect to another. By quantifying the difference in the corresponding uncertainties, we found that, in this case, the relative depths of the structures could be estimated much better than their absolute depths. This analysis justifies redatuming below an uncertain overburden for the purposes of the uncertainty reduction. TOTAL (Firm) 2016-01-20T02:09:52Z 2016-01-20T02:09:52Z 2015-11 2015-07 Article http://purl.org/eprint/type/JournalArticle 0016-8033 1942-2156 http://hdl.handle.net/1721.1/100940 Poliannikov, Oleg V., and Alison E. Malcolm. “The Effect of Velocity Uncertainty on Migrated Reflectors: Improvements from Relative-Depth Imaging.” GEOPHYSICS 81, no. 1 (November 6, 2015): S21–S29. © 2015 Society of Exploration Geophysicists en_US http://dx.doi.org/10.1190/GEO2014-0604.1 GEOPHYSICS Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf Society of Exploration Geophysicists Society of Exploration Geophysicists |
| spellingShingle | Poliannikov, Oleg V. Malcolm, Alison E. The effect of velocity uncertainty on migrated reflectors: Improvements from relative-depth imaging |
| title | The effect of velocity uncertainty on migrated reflectors: Improvements from relative-depth imaging |
| title_full | The effect of velocity uncertainty on migrated reflectors: Improvements from relative-depth imaging |
| title_fullStr | The effect of velocity uncertainty on migrated reflectors: Improvements from relative-depth imaging |
| title_full_unstemmed | The effect of velocity uncertainty on migrated reflectors: Improvements from relative-depth imaging |
| title_short | The effect of velocity uncertainty on migrated reflectors: Improvements from relative-depth imaging |
| title_sort | effect of velocity uncertainty on migrated reflectors improvements from relative depth imaging |
| url | http://hdl.handle.net/1721.1/100940 |
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