Estimation of anisotropy parameters, δ and ε: An application to borehole and seismic data from Ketzin, Germany

© 2016, Chiang Mai University. All rights reserved. Weak anisotropy was indicated in a previous investigation of the 3D baseline seismic data acquired through the EU funded CO2SINK project at the Ketzin pilot site for CO2storage, Germany. Fourth order velocity analysis yielded the Alkhalifah anellip...

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Main Authors: Mingkhwan Kruachanta, Suthasinee Kongmongkhol, Monika Ivandic, Suwimon Udphuay, Siriporn Chaisri, Pisanu Wongpornchai, Christopher Juhlin
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/55291
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spelling th-cmuir.6653943832-552912018-09-05T03:14:19Z Estimation of anisotropy parameters, δ and ε: An application to borehole and seismic data from Ketzin, Germany Mingkhwan Kruachanta Suthasinee Kongmongkhol Monika Ivandic Suwimon Udphuay Siriporn Chaisri Pisanu Wongpornchai Christopher Juhlin Biochemistry, Genetics and Molecular Biology Chemistry Materials Science Mathematics Physics and Astronomy © 2016, Chiang Mai University. All rights reserved. Weak anisotropy was indicated in a previous investigation of the 3D baseline seismic data acquired through the EU funded CO2SINK project at the Ketzin pilot site for CO2storage, Germany. Fourth order velocity analysis yielded the Alkhalifah anellipticity factor, or eta (η), ranging from -0.2399 to 0.1341 for the whole study area. Although application of the simple η term in the moveout correction allowed reflections to be flattened at far offsets, resulting in an improved seismic stacked section, the Thomsen parameters, delta (δ) and epsilon (ε) are of greater interest from a rock physics perspective. Borehole data from Ketzin were introduced to estimate δ and ε using known relationships between sonic wave velocity, NMO velocity, η, δ and ε. In this paper, δ and ε estimations were performed using data from three wells; the CO2injection well and two observation wells. Preliminary estimates of the Thomsen parameters give δ ranging from -0.2658 to -0.1270, while ε ranges from -0.2611 to -0.1141. These δ and ε values also indicate the presence of weak vertical transverse isotropy at the site, which is consistent with the previous study. 2018-09-05T02:54:02Z 2018-09-05T02:54:02Z 2016-01-01 Journal 01252526 2-s2.0-85007015065 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85007015065&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/55291
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Biochemistry, Genetics and Molecular Biology
Chemistry
Materials Science
Mathematics
Physics and Astronomy
spellingShingle Biochemistry, Genetics and Molecular Biology
Chemistry
Materials Science
Mathematics
Physics and Astronomy
Mingkhwan Kruachanta
Suthasinee Kongmongkhol
Monika Ivandic
Suwimon Udphuay
Siriporn Chaisri
Pisanu Wongpornchai
Christopher Juhlin
Estimation of anisotropy parameters, δ and ε: An application to borehole and seismic data from Ketzin, Germany
description © 2016, Chiang Mai University. All rights reserved. Weak anisotropy was indicated in a previous investigation of the 3D baseline seismic data acquired through the EU funded CO2SINK project at the Ketzin pilot site for CO2storage, Germany. Fourth order velocity analysis yielded the Alkhalifah anellipticity factor, or eta (η), ranging from -0.2399 to 0.1341 for the whole study area. Although application of the simple η term in the moveout correction allowed reflections to be flattened at far offsets, resulting in an improved seismic stacked section, the Thomsen parameters, delta (δ) and epsilon (ε) are of greater interest from a rock physics perspective. Borehole data from Ketzin were introduced to estimate δ and ε using known relationships between sonic wave velocity, NMO velocity, η, δ and ε. In this paper, δ and ε estimations were performed using data from three wells; the CO2injection well and two observation wells. Preliminary estimates of the Thomsen parameters give δ ranging from -0.2658 to -0.1270, while ε ranges from -0.2611 to -0.1141. These δ and ε values also indicate the presence of weak vertical transverse isotropy at the site, which is consistent with the previous study.
format Journal
author Mingkhwan Kruachanta
Suthasinee Kongmongkhol
Monika Ivandic
Suwimon Udphuay
Siriporn Chaisri
Pisanu Wongpornchai
Christopher Juhlin
author_facet Mingkhwan Kruachanta
Suthasinee Kongmongkhol
Monika Ivandic
Suwimon Udphuay
Siriporn Chaisri
Pisanu Wongpornchai
Christopher Juhlin
author_sort Mingkhwan Kruachanta
title Estimation of anisotropy parameters, δ and ε: An application to borehole and seismic data from Ketzin, Germany
title_short Estimation of anisotropy parameters, δ and ε: An application to borehole and seismic data from Ketzin, Germany
title_full Estimation of anisotropy parameters, δ and ε: An application to borehole and seismic data from Ketzin, Germany
title_fullStr Estimation of anisotropy parameters, δ and ε: An application to borehole and seismic data from Ketzin, Germany
title_full_unstemmed Estimation of anisotropy parameters, δ and ε: An application to borehole and seismic data from Ketzin, Germany
title_sort estimation of anisotropy parameters, δ and ε: an application to borehole and seismic data from ketzin, germany
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85007015065&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/55291
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