Full-waveform inversion of cross-hole GPR data collected in a strongly heterogeneous chalk reservoir analogue with sharp permittivity and conductivity contrasts

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Chalk sediments form an important reservoir for groundwater onshore and for hydrocarbons in the Danish sector of the North Sea. Cross-hole Ground-penetrating radar (GPR) tomography is an efficient method to investigate subtle porosity variations in the chalk. Traditional ray-based inversion techniques provide models that are overly smooth and have relatively low resolution. We present preliminary results from full-waveform inversion of data collected in strongly heterogeneous chalk. The resolution of the tomograms has improved significantly compared to models obtained from travel-time tomography. The new models also reflect the variability seen in 1D drill core analysis. The results indicate that full-waveform inversion is a well-suited inversion technique for high-resolution time-lapse-based flow characterization.

Read More: http://library.seg.org/doi/abs/10.1190/segam2014-1199.1
Original languageEnglish
Title of host publicationSEG Technical Program Expanded Abstracts : SEG Denver, 26-31October 2014
Number of pages6
PublisherSociety of Exploration Geophysicists (SEG)
Publication date2014
Publication statusPublished - 2014
SeriesS E G Technical Program Expanded Abstracts (Online)

ID: 132763278