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Joint-Inversion of Borehole Tomographic Data
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 80th EAGE Conference and Exhibition 2018, Jun 2018, Volume 2018, p.1 - 5
Abstract
High-resolution cross-borehole tomographic data were acquired in a groundwater investigation. Both vertical and horizontal component sources were used to generate three wave types, namely P-waves, horizontally polarized and vertically polarized S-waves. The three co-located traveltime datasets were jointly inverted by employing cross-gradient constraints, thus structurally coupling the accurately determined P-wave traveltimes to the less accurate S-wave traveltimes. Multi-solutions inherent to the inverse problem were reduced and the S-wave tomograms are geologically more plausible, as they correspond better to the borehole logs than their separate inversion counterparts. This facilitates an integrated interpretation and enables the detection of aquifer heterogeneities by analysing the distribution of elastic parameters.