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NARROW
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all geography including DSDP/ODP Sites and Legs
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Atlantic Ocean
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Water flow pattern recognition and fracture characterization in near-surface chalks using time-lapse ground-penetrating radar: An experiment
Innovative land seismic investigations for CO 2 geologic storage in Denmark
Prediction of porosity and water saturation of chalks from combined refraction seismic and reflection ground-penetrating radar measurements
Using a synthetic data trained convolutional neural network for predicting subresolution thin layers from seismic data
Seismic interpretation pitfalls caused by interference effects, exemplified by seismic modeling of outcropping chalk successions
Rock-physics characterization of chalk by combining acoustic and electromagnetic properties
Quantitative seismic interpretation of the Lower Cretaceous reservoirs in the Valdemar Field, Danish North Sea
Upscaling of outcrop information for improved reservoir modelling – exemplified by a case study on chalk
On the usage of diffractions in ground-penetrating radar reflection data: Implications for time-lapse gas migration monitoring
Improved seismic interpretation of a salt diapir by utilization of diffractions, exemplified by 2D reflection seismics, Danish sector of the North Sea
Deep onshore reflection seismic imaging of the chalk group strata using a 45 kg accelerated weight-drop and combined recording systems with dense receiver spacing
Diffraction imaging of ground-penetrating radar data
Mapping sand layers in clayey till using crosshole ground-penetrating radar
Stratigraphy, Evolution, and Controls of A Holocene Transgressive–Regressive Barrier Island Under Changing Sea Level: Danish North Sea Coast
Bayesian Markov-Chain-Monte-Carlo Inversion of Time-Lapse Crosshole GPR Data to Characterize the Vadose Zone at the Arrenaes Site, Denmark
Comparing Plume Characteristics Inferred from Cross-Borehole Geophysical Data
Visualizing Unsaturated Flow Phenomena Using High-Resolution Reflection Ground Penetrating Radar All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher.
Geostatistical inference using crosshole ground-penetrating radar
Estimation of Chalk Heterogeneity from Stochastic Modeling Conditioned by Crosshole GPR Traveltimes and Log Data
Abstract Rocks from the Chalk Group host important reservoirs of groundwater onshore Denmark and oil and gas in the North Sea. Fine-scale heterogeneity of rocks from the Chalk Group is investigated by stochastic modeling conditioned by first-arrival crosshole GPR traveltimes and lithology data from boreholes. The water-saturated carbonate-dominated rocks contain sharp contrasts among highly porous low-velocity carbonate, thin intercalations of flint, and hardened low-porosity carbonate of higher velocity. The stochastic simulation algorithm can model the contrasting lithologies effectively. It is found that bimodal distributions produce geologically plausible representations of the subsurface. Moreover, the variety of tested stochastic models that honors the specified data uncertainties and prior information provide a good overview of possible subsurface scenarios that the combined data set allows for. Results motivate future GPR-based tracer tests and time-lapse studies for generation of new knowledge of the dynamics of Chalk Group fluid flow.