Titre
Inversion of tracer test data using tomographic constraints
Type
article
Institution
Externe
Périodique
Auteur(s)
Linde, N.
Auteure/Auteur
Finsterle, S.
Auteure/Auteur
Hubbard, S.
Auteure/Auteur
Liens vers les personnes
ISSN
0043-1397
Statut éditorial
Publié
Date de publication
2006-04
Volume
42
Numéro
4
Première page
W04410
Langue
anglais
Notes
ISI:000237314000001
Résumé
We have developed a methodology for inverting tracer test data using
zonation information obtained from two-dimensional radar tomograms to
improve the (typically overly smooth) hydraulic conductivity fields
obtained from conventional inversion of tracer test data. The method
simultaneously yields two-dimensional estimates of hydraulic
conductivity as well as petrophysical relationships that relate
hydraulic conductivity to radar velocity; these relationships can be
assumed to be stationary throughout the area of investigation or to vary
as a function of zonation. Using a synthetic three-dimensional hydraulic
conductivity field, we apply the developed inversion methodology and
explore the impact of the strength and stationarity of the petrophysical
relationship as well as the impact of errors that are often associated
with radar data acquisition (such as unknown borehole deviation). We
find that adding radar tomographic data to tracer test data improves
hydrogeological site characterization, even in the presence of minor
radar data errors. The results are contingent on the assumption that a
relationship between radar velocity and hydraulic conductivity exists.
Therefore the applicability of the proposed method may be limited to
field sites where this condition is partially or fully satisfied.
zonation information obtained from two-dimensional radar tomograms to
improve the (typically overly smooth) hydraulic conductivity fields
obtained from conventional inversion of tracer test data. The method
simultaneously yields two-dimensional estimates of hydraulic
conductivity as well as petrophysical relationships that relate
hydraulic conductivity to radar velocity; these relationships can be
assumed to be stationary throughout the area of investigation or to vary
as a function of zonation. Using a synthetic three-dimensional hydraulic
conductivity field, we apply the developed inversion methodology and
explore the impact of the strength and stationarity of the petrophysical
relationship as well as the impact of errors that are often associated
with radar data acquisition (such as unknown borehole deviation). We
find that adding radar tomographic data to tracer test data improves
hydrogeological site characterization, even in the presence of minor
radar data errors. The results are contingent on the assumption that a
relationship between radar velocity and hydraulic conductivity exists.
Therefore the applicability of the proposed method may be limited to
field sites where this condition is partially or fully satisfied.
PID Serval
serval:BIB_EDBF73C4BFED
Open Access
Oui
Date de création
2012-03-30T11:25:28.435Z
Date de création dans IRIS
2025-05-21T06:41:22Z