High resolution seismic mapping of a shallow aquifer
<p>In the past, geological analysis did not often incorporate seismology into integrated environmental studies. This was due in part to the expense of running multifold reflection surveys, and additionally the lack of expertise of the individuals involved in the environmental and groundwater f...
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ndltd-USASK-oai-usask.ca-etd-08032012-1204462013-01-08T16:35:41Z High resolution seismic mapping of a shallow aquifer Hooge, Corey D. <p>In the past, geological analysis did not often incorporate seismology into integrated environmental studies. This was due in part to the expense of running multifold reflection surveys, and additionally the lack of expertise of the individuals involved in the environmental and groundwater fields. However, in recent history, the progress of technology and increasing need for more detailed non-invasive investigations of subsurface geology has encouraged the use of imaging methods such as CDP reflection seismology.</p> <p>The Dalmeny project was designed to address many of the issues related to the differences between a standard petroleum seismology survey and a shallow survey in glaciated areas. These differences exist in three principle areas: survey design and data acquisition (CDP reflection profiling), data processing, and interpretation.</p> <p>The post-Cretaceous geology of central Saskatchewan is composed of several till and sand units (e.g. Dalmeny aquifer) and a non-glacial incised valley aquifer (Tyner Valley aquifer). The sands of the Dalmeny and Tyner Valley are major aquifers and were the principle targets for reflection surveying.</p> <p>Utilisation of wave equation modelling in the survey design process provided opportunities to optimise survey parameter values economically. Additionally, the use of non-standard acquisition techniques provided enhanced data quality and increased resolution over previous shallow seismic surveys.</p> <p>Rigorous interpretation techniques have been used to extract as much information as possible from the Dalmeny data set. Advanced interpretation techniques such as complex trace attribute analysis and velocity inversion were attempted. Results indicate interesting variation and complexities which were not apparent on the standard section. Near surface analysis of refraction information was used to quantify elastic properties (velocities) for the highly weathered shallow(< 10m) strata.</p> <p>The results of the Dalmeny project provided have shown that the acquisition of high frequency (> 200 Hz) seismic data is possible in a glaciated terrain. The detailed analytical procedure used in obtaining the acquisition parameters facilitated these results. Enhanced data processing using advanced algorithms available for conventional seismology significantly increased the frequency content and data quality.</p> <p>Note:</p><p>This thesis contains maps that have been sized to fit the viewing area. Use the zoom in tool to view the maps in detail or to enlarge the text.</p> Daku, Brian Ansdell, Kevin Pratt, Brian Gendzwill, Don Merriam, Jim Stauffer, Mel Hendry, Hugh Hajnal, Zoltan University of Saskatchewan 2012-08-21 text application/pdf http://library.usask.ca/theses/available/etd-08032012-120446/ http://library.usask.ca/theses/available/etd-08032012-120446/ en unrestricted I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to University of Saskatchewan or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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<p>In the past, geological analysis did not often incorporate seismology into
integrated environmental studies. This was due in part to the expense of running multifold
reflection surveys, and additionally the lack of expertise of the individuals involved
in the environmental and groundwater fields. However, in recent history, the progress of
technology and increasing need for more detailed non-invasive investigations of
subsurface geology has encouraged the use of imaging methods such as CDP reflection
seismology.</p>
<p>The Dalmeny project was designed to address many of the issues related to the
differences between a standard petroleum seismology survey and a shallow survey in
glaciated areas. These differences exist in three principle areas: survey design and data
acquisition (CDP reflection profiling), data processing, and interpretation.</p>
<p>The post-Cretaceous geology of central Saskatchewan is composed of several till
and sand units (e.g. Dalmeny aquifer) and a non-glacial incised valley aquifer (Tyner
Valley aquifer). The sands of the Dalmeny and Tyner Valley are major aquifers and were
the principle targets for reflection surveying.</p>
<p>Utilisation of wave equation modelling in the survey design process provided
opportunities to optimise survey parameter values economically. Additionally, the use of
non-standard acquisition techniques provided enhanced data quality and increased
resolution over previous shallow seismic surveys.</p>
<p>Rigorous interpretation techniques have been used to extract as much information
as possible from the Dalmeny data set. Advanced interpretation techniques such as complex trace attribute analysis and velocity inversion were attempted. Results indicate
interesting variation and complexities which were not apparent on the standard section.
Near surface analysis of refraction information was used to quantify elastic properties
(velocities) for the highly weathered shallow(< 10m) strata.</p>
<p>The results of the Dalmeny project provided have shown that the acquisition of
high frequency (> 200 Hz) seismic data is possible in a glaciated terrain. The detailed
analytical procedure used in obtaining the acquisition parameters facilitated these results.
Enhanced data processing using advanced algorithms available for conventional
seismology significantly increased the frequency content and data quality.</p>
<p>Note:</p><p>This thesis contains maps that have been sized to fit the viewing area. Use the zoom in tool to view the maps in detail or to enlarge the text.</p> |
author2 |
Daku, Brian |
author_facet |
Daku, Brian Hooge, Corey D. |
author |
Hooge, Corey D. |
spellingShingle |
Hooge, Corey D. High resolution seismic mapping of a shallow aquifer |
author_sort |
Hooge, Corey D. |
title |
High resolution seismic mapping of a shallow aquifer |
title_short |
High resolution seismic mapping of a shallow aquifer |
title_full |
High resolution seismic mapping of a shallow aquifer |
title_fullStr |
High resolution seismic mapping of a shallow aquifer |
title_full_unstemmed |
High resolution seismic mapping of a shallow aquifer |
title_sort |
high resolution seismic mapping of a shallow aquifer |
publisher |
University of Saskatchewan |
publishDate |
2012 |
url |
http://library.usask.ca/theses/available/etd-08032012-120446/ |
work_keys_str_mv |
AT hoogecoreyd highresolutionseismicmappingofashallowaquifer |
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