Porosity models for heterogeneous alluvial aquifers based on conditional geostatistical simulations using hydrogeophysical data

Details

Serval ID
serval:BIB_4234361DBD11
Type
Inproceedings: an article in a conference proceedings.
Collection
Publications
Title
Porosity models for heterogeneous alluvial aquifers based on conditional geostatistical simulations using hydrogeophysical data
Title of the conference
74th SEG Annual Meeting, Denver, Colorado
Author(s)
Tronicke J., Holliger K.
Publisher
Society of Exploration Geophysicists
ISSN-L
1052-3812
Publication state
Published
Issued date
2004
Pages
NSG3.3
Language
english
Abstract
High-resolution geophysical data can bridge the gap in terms of resolution
and coverage between traditional hydrological methods, such as core
analyses and tracer/pumping tests. Although there is ample evidence
of links between geophysical and hydrological parameters, such relationships
are often weak, ambiguous and site-specific. Therefore, alternative
approaches must be developed to combine geophysical and hydrological
data measured at different scales. The quantitative integration of
such a diverse database represents one of the major challenges in
the field of hydrogeophysics. In this study, we explore the usefulness
of conditional geostatistical simulations for this purpose. Using
a realistic porosity model of a heterogeneous alluvial aquifer, we
simulate corresponding neutron porosity logs and crosshole georadar
tomographic surveys. The reason for the choice of these geophysical
methods is that they provide the most direct estimates of the porosity
structure. We then use a conditional simulation approach based on
simulated annealing to integrate this database. The effectiveness
of this approach is assessed by comparing the results for a variety
of modeled porosity fields that differ fundamentally in terms of
their conditioning data. Our results indicate that this approach
allows for a realistic characterization in the sub-meter range of
the porosity distribution in heterogeneous alluvial aquifers.
Create date
25/11/2013 18:28
Last modification date
20/08/2019 13:44
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