| Abstract: | Imaging with acoustic and optical televiewers results in continuous and oriented 360?? views of the borehole wall from which the character, relation, and orientation of lithologic and structural planar features can be defined for studies of fractured-rock aquifers. Fractures are more clearly defined under a wider range of conditions on acoustic images than on optical images including dark-colored rocks, cloudy borehole water, and coated borehole walls. However, optical images allow for the direct viewing of the character of and relation between lithology, fractures, foliation, and bedding. The most powerful approach is the combined application of acoustic and optical imaging with integrated interpretation. Imaging of the borehole wall provides information useful for the collection and interpretation of flowmeter and other geophysical logs, core samples, and hydraulic and water-quality data from packer testing and monitoring. ?? 2003 Elsevier B.V. All rights reserved. |
| Genre: | Article |
| ProdID: | 70027686 |
| Citation Author: | Williams, J. H.; Johnson, C. D. |
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| Citation End Page: | 159 |
| Citation Issue: | 1-2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Applied Geophysics |
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| Citation Number Of Pages: | 9 |
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| Citation Search Results Text: | Acoustic and optical borehole-wall imaging for fractured-rock aquifer studies; 2004; Article; Journal; Journal of Applied Geophysics; Williams, J. H.; Johnson, C. D. |
| Citation Start Page: | 151 |
| Citation Volume: | 55 |
| Citation Year: | 2004 |
| Type: | citation/reference |
| Text: | Acoustic and optical borehole-wall imaging for fractured-rock aquifer studies; 2004; Article; Journal; Journal of Applied Geophysics; Williams, J. H.; Johnson, C. D. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/j.jappgeo.2003.06.009 |
| Date Other: | Thu, 1 Jan 2004 00:00 -0600 |
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