Articles | Volume 7, issue 4
https://doi.org/10.5194/se-7-1243-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/se-7-1243-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Method article
| 
22 Aug 2016
Method article |
| 22 Aug 2016
On the path to the digital rock physics of gas hydrate-bearing sediments – processing of in situ synchrotron-tomography data
Kathleen Sell
CORRESPONDING AUTHOR
Institute of Geosciences, Johannes Gutenberg University, Mainz, Germany
Erik H. Saenger
International Geothermal Centre, Bochum, Germany
Ruhr University, Bochum, Germany
Andrzej Falenty
GZG Crystallography, Georg August University, Göttingen, Germany
Marwen Chaouachi
GZG Crystallography, Georg August University, Göttingen, Germany
David Haberthür
Swiss Light Source, Paul Scherrer Institute, Villigen, Switzerland
Frieder Enzmann
Institute of Geosciences, Johannes Gutenberg University, Mainz, Germany
Werner F. Kuhs
GZG Crystallography, Georg August University, Göttingen, Germany
Michael Kersten
Institute of Geosciences, Johannes Gutenberg University, Mainz, Germany
Related authors
Swarup Chauhan, Kathleen Sell, Wolfram Rühaak, Thorsten Wille, and Ingo Sass
Geosci. Model Dev., 13, 315–334, https://doi.org/10.5194/gmd-13-315-2020, https://doi.org/10.5194/gmd-13-315-2020, 2020
Short summary
Short summary
We present CobWeb 1.0, a graphical user interface for analysing tomographic images of geomaterials. CobWeb offers different machine learning techniques for accurate multiphase image segmentation and visualizing material specific parameters such as pore size distribution, relative porosity and volume fraction. We demonstrate a novel approach of dual filtration and dual segmentation to eliminate edge enhancement artefact in synchrotron-tomographic datasets and provide the computational code.
Kathleen Sell, Beatriz Quintal, Michael Kersten, and Erik H. Saenger
Solid Earth, 9, 699–711, https://doi.org/10.5194/se-9-699-2018, https://doi.org/10.5194/se-9-699-2018, 2018
Short summary
Short summary
Sediments containing hydrates dispersed in the pore space show a characteristic seismic anomaly: a high attenuation along with increasing seismic velocities. Recent major findings from synchrotron experiments revealed the systematic presence of thin water films between quartz and gas hydrate. Our numerical studies support earlier speculation that squirt flow causes high attenuation at seismic frequencies but are based on a conceptual model different to those previously considered.
Christopher J. L. Wilson, Mark Peternell, Filomena Salvemini, Vladimir Luzin, Frieder Enzmann, Olga Moravcova, and Nicholas J. R. Hunter
The Cryosphere, 18, 819–836, https://doi.org/10.5194/tc-18-819-2024, https://doi.org/10.5194/tc-18-819-2024, 2024
Short summary
Short summary
As the temperature increases within a deforming ice aggregate, composed of deuterium (D2O) ice and water (H2O) ice, a set of meltwater segregations are produced. These are composed of H2O and HDO and are located in conjugate shear bands and in compaction bands which accommodate the deformation and weaken the ice aggregate. This has major implications for the passage of meltwater in ice sheets and the formation of the layering recognized in glaciers.
Martin Balcewicz, Benedikt Ahrens, Kevin Lippert, and Erik H. Saenger
Solid Earth, 12, 35–58, https://doi.org/10.5194/se-12-35-2021, https://doi.org/10.5194/se-12-35-2021, 2021
Short summary
Short summary
The geothermal potential of a carbonate reservoir in the Rhine-Ruhr area, Germany, was investigated by field and laboratory investigations. The carbonate layer of interest is approx. 150 m thick; located at 4 to 6 km depth; and might extend below Essen, Bochum, and Dortmund. We proposed focusing on discontinuities striking NNW–SSE for geothermal applications, as these are the most common, strike in the direction of the main horizontal stress, and dominate reservoir fluid flow.
Arne Jacob, Markus Peltz, Sina Hale, Frieder Enzmann, Olga Moravcova, Laurence N. Warr, Georg Grathoff, Philipp Blum, and Michael Kersten
Solid Earth, 12, 1–14, https://doi.org/10.5194/se-12-1-2021, https://doi.org/10.5194/se-12-1-2021, 2021
Short summary
Short summary
In this work, we combined different imaging and experimental measuring methods for analysis of cross-scale effects which reduce permeability of tight reservoir rocks. Simulated permeability of digital images of rocks is often overestimated, which is caused by non-resolvable clay content within the pores of a rock. By combining FIB-SEM with micro-XCT imaging, we were able to simulate the true clay mineral abundance to match experimentally measured permeability with simulated permeability.
Swarup Chauhan, Kathleen Sell, Wolfram Rühaak, Thorsten Wille, and Ingo Sass
Geosci. Model Dev., 13, 315–334, https://doi.org/10.5194/gmd-13-315-2020, https://doi.org/10.5194/gmd-13-315-2020, 2020
Short summary
Short summary
We present CobWeb 1.0, a graphical user interface for analysing tomographic images of geomaterials. CobWeb offers different machine learning techniques for accurate multiphase image segmentation and visualizing material specific parameters such as pore size distribution, relative porosity and volume fraction. We demonstrate a novel approach of dual filtration and dual segmentation to eliminate edge enhancement artefact in synchrotron-tomographic datasets and provide the computational code.
Mathias Nehler, Ferdinand Stoeckhert, Anne Oelker, Jörg Renner, and Erik Saenger
Solid Earth Discuss., https://doi.org/10.5194/se-2019-48, https://doi.org/10.5194/se-2019-48, 2019
Publication in SE not foreseen
Short summary
Short summary
The technique of X-ray computed tomography (CT) is widely used in multiple disciplines such as medicine, industry and earth sciences. However, quantitative analysis from the reconstructed images are subject to errors due to technical limitations and subsequent evaluation workflows. The paper addresses the uncertainties related to the estimation of porosity from these images and compares the results with laboratory measurements. Accurate porosity estimates are linked to sufficient resolution.
Claudia Werner and Erik H. Saenger
Solid Earth, 9, 1487–1505, https://doi.org/10.5194/se-9-1487-2018, https://doi.org/10.5194/se-9-1487-2018, 2018
Short summary
Short summary
Time reverse imaging is a method for locating quasi-simultaneous or low-amplitude earthquakes. Numerous three-dimensional synthetic simulations were performed to discover the influence of station distributions, complex velocity models and high noise rates on the reliability of localisations. The guidelines obtained enable the estimation of the localisation success rates of an existing station set-up and provide the basis for designing new arrays.
Kathleen Sell, Beatriz Quintal, Michael Kersten, and Erik H. Saenger
Solid Earth, 9, 699–711, https://doi.org/10.5194/se-9-699-2018, https://doi.org/10.5194/se-9-699-2018, 2018
Short summary
Short summary
Sediments containing hydrates dispersed in the pore space show a characteristic seismic anomaly: a high attenuation along with increasing seismic velocities. Recent major findings from synchrotron experiments revealed the systematic presence of thin water films between quartz and gas hydrate. Our numerical studies support earlier speculation that squirt flow causes high attenuation at seismic frequencies but are based on a conceptual model different to those previously considered.
Georg H. Grathoff, Markus Peltz, Frieder Enzmann, and Stephan Kaufhold
Solid Earth, 7, 1145–1156, https://doi.org/10.5194/se-7-1145-2016, https://doi.org/10.5194/se-7-1145-2016, 2016
Short summary
Short summary
This study improves our understanding of the evolution of pores in shales for modelling transport properties. 3-D microscopy on early and postmature Posidonia Shales showed similar porosities and pore size distributions. Large isolated pore clusters are within carbonates and clay minerals. Pores form during maturation in the postmature-matrix-filling organic matter. Modelled permeabilities are lowest perpendicular to bedding. They decrease with increasing maturity and are comparable to experimental data.
Tobias Kling, Da Huo, Jens-Oliver Schwarz, Frieder Enzmann, Sally Benson, and Philipp Blum
Solid Earth, 7, 1109–1124, https://doi.org/10.5194/se-7-1109-2016, https://doi.org/10.5194/se-7-1109-2016, 2016
Short summary
Short summary
A method is introduced to implement medical CT data of a fractured sandstone under varying confining pressures into fluid flow simulations to reproduce experimental permeabilities. The simulation results reproduce plausible fracture flow features (e.g. flow channeling, fracture closing/opening) and approximate the actual permeabilities, which are affected by the CT resolution and compositional matrix heterogeneities. Additionally, some recommendations are presented concerning future studies.
Steven Henkel, Dieter Pudlo, Frieder Enzmann, Viktor Reitenbach, Daniel Albrecht, Leonhard Ganzer, and Reinhard Gaupp
Solid Earth, 7, 917–927, https://doi.org/10.5194/se-7-917-2016, https://doi.org/10.5194/se-7-917-2016, 2016
Short summary
Short summary
This study investigates the experimentally induced effects of CO2 storage on underground reservoir sandstones by applying high-resolution computer tomography and standard petrophysical methods. The results of digital rock physic calculations derived from the µ-CT scans are compared with measurements achieved by the standard methods. Both approaches lead to similar results for coarse- and medium-grained sandstones but differ for fine-grained sediments.
Faisal Khan, Frieder Enzmann, and Michael Kersten
Solid Earth, 7, 481–492, https://doi.org/10.5194/se-7-481-2016, https://doi.org/10.5194/se-7-481-2016, 2016
Short summary
Short summary
X-ray microtomography image processing involves artefact reduction and image segmentation. The beam-hardening artefact is removed, applying a new algorithm, which minimizes the offsets of the attenuation data points. For the segmentation, we propose using a non-linear classifier algorithm. Statistical analysis was performed to quantify the improvement in multi-phase classification of rock cores using and without using our advanced beam-hardening correction algorithm.
Related subject area
Geophysics
Post-Caledonian tectonic evolution of the Precambrian and Paleozoic platform boundary zone offshore Poland based on the new and vintage multi-channel reflection seismic data
Geodynamic controls on clastic-dominated base metal deposits
Seismic wave modeling of fluid-saturated fractured porous rock: including fluid pressure diffusion effects of discretely distributed large-scale fractures
Comparison of surface-wave techniques to estimate S- and P-wave velocity models from active seismic data
Integration of automatic implicit geological modelling in deterministic geophysical inversion
Complex fault system revealed by 3-D seismic reflection data with deep learning and fault network analysis
Numerical modeling of stresses and deformation in the Zagros–Iranian Plateau region
Advanced seismic characterization of a geothermal carbonate reservoir – insight into the structure and diagenesis of a reservoir in the German Molasse Basin
Electrical conductivity of anhydrous and hydrous gabbroic melt under high temperature and high pressure: implications for the high-conductivity anomalies in the mid-ocean ridge region
Ground motion emissions due to wind turbines: observations, acoustic coupling, and attenuation relationships
Formation and geophysical character of transitional crust at the passive continental margin around Walvis Ridge, Namibia
Seismic amplitude response to internal heterogeneity of mass-transport deposits
Investigation of the effects of surrounding media on the distributed acoustic sensing of a helically wound fibre-optic cable with application to the New Afton deposit, British Columbia
Utilisation of probabilistic magnetotelluric modelling to constrain magnetic data inversion: proof-of-concept and field application
Geophysical analysis of an area affected by subsurface dissolution – case study of an inland salt marsh in northern Thuringia, Germany
Comparison of straight-ray and curved-ray surface wave tomography approaches in near-surface studies
An efficient probabilistic workflow for estimating induced earthquake parameters in 3D heterogeneous media
3D deep geothermal reservoir imaging with wireline distributed acoustic sensing in two boreholes
3D high-resolution seismic imaging of the iron oxide deposits in Ludvika (Sweden) using full-waveform inversion and reverse time migration
Three-dimensional reflection seismic imaging of the iron oxide deposits in the Ludvika mining area, Sweden, using Fresnel volume migration
Drone-based magnetic and multispectral surveys to develop a 3D model for mineral exploration at Qullissat, Disko Island, Greenland
Ambient seismic noise analysis of LARGE-N data for mineral exploration in the Central Erzgebirge, Germany
Surface-wave tomography for mineral exploration: a successful combination of passive and active data (Siilinjärvi phosphorus mine, Finland)
Reflection tomography by depth warping: a case study across the Java trench
Dynamic motion monitoring of a 3.6 km long steel rod in a borehole during cold-water injection with distributed fiber-optic sensing
Impact of Timanian thrust systems on the late Neoproterozoic–Phanerozoic tectonic evolution of the Barents Sea and Svalbard
Forearc density structure of the overriding plate in the northern area of the giant 1960 Valdivia earthquake
Imaging crustal structures through a passive seismic imaging approach in a mining area in Saxony, Germany
Investigating the effects of intersection flow localization in equivalent-continuum-based upscaling of flow in discrete fracture networks
Cross-diffusion waves resulting from multiscale, multiphysics instabilities: application to earthquakes
Reverse time migration (RTM) imaging of iron oxide deposits in the Ludvika mining area, Sweden
Near-surface structure of the Sodankylä area in Finland, obtained by passive seismic interferometry
Evolution of the Iberian Massif as deduced from its crustal thickness and geometry of a mid-crustal (Conrad) discontinuity
Four-dimensional tracer flow reconstruction in fractured rock through borehole ground-penetrating radar (GPR) monitoring
Moho topography beneath the European Eastern Alps by global-phase seismic interferometry
Seismic imaging across fault systems in the Abitibi greenstone belt – an analysis of pre- and post-stack migration approaches in the Chibougamau area, Quebec, Canada
Early Cenozoic Eurekan strain partitioning and decoupling in central Spitsbergen, Svalbard
On the comparison of strain measurements from fibre optics with a dense seismometer array at Etna volcano (Italy)
Cross-diffusion waves resulting from multiscale, multi-physics instabilities: theory
Multi-scale analysis and modelling of aeromagnetic data over the Bétaré-Oya area in eastern Cameroon, for structural evidence investigations
The impact of seismic interpretation methods on the analysis of faults: a case study from the Snøhvit field, Barents Sea
Wireline distributed acoustic sensing allows 4.2 km deep vertical seismic profiling of the Rotliegend 150 °C geothermal reservoir in the North German Basin
Integrated land and water-borne geophysical surveys shed light on the sudden drying of large karst lakes in southern Mexico
Sparse 3D reflection seismic survey for deep-targeting iron oxide deposits and their host rocks, Ludvika Mines, Sweden
Fault sealing and caprock integrity for CO2 storage: an in situ injection experiment
What can seismic noise tell us about the Alpine reactivation of the Iberian Massif? An example in the Iberian Central System
In situ hydromechanical responses during well drilling recorded by fiber-optic distributed strain sensing
Coherent diffraction imaging for enhanced fault and fracture network characterization
On the morphology and amplitude of 2D and 3D thermal anomalies induced by buoyancy-driven flow within and around fault zones
Characterizing a decametre-scale granitic reservoir using ground-penetrating radar and seismic methods
Quang Nguyen, Michal Malinowski, Stanisław Mazur, Sergiy Stovba, Małgorzata Ponikowska, and Christian Hübscher
Solid Earth, 15, 1029–1046, https://doi.org/10.5194/se-15-1029-2024, https://doi.org/10.5194/se-15-1029-2024, 2024
Short summary
Short summary
Our work demonstrates the following: (1) an efficient seismic data-processing strategy focused on suppressing shallow-water multiple reflections. (2) An improvement in the quality of legacy marine seismic data. (3) A seismic interpretation of sedimentary successions overlying the basement in the transition zone from the Precambrian to Paleozoic platforms. (4) The tectonic evolution of the Koszalin Fault and its relation to the Caledonian Deformation Front offshore Poland.
Anne C. Glerum, Sascha Brune, Joseph M. Magnall, Philipp Weis, and Sarah A. Gleeson
Solid Earth, 15, 921–944, https://doi.org/10.5194/se-15-921-2024, https://doi.org/10.5194/se-15-921-2024, 2024
Short summary
Short summary
High-value zinc–lead deposits formed in sedimentary basins created when tectonic plates rifted apart. We use computer simulations of rifting and the associated sediment erosion and deposition to understand why they formed in some basins but not in others. Basins that contain a metal source, faults that focus fluids, and rocks that can host deposits occurred in both narrow and wide rifts for ≤ 3 Myr. The largest and the most deposits form in narrow margins of narrow asymmetric rifts.
Yingkai Qi, Xuehua Chen, Qingwei Zhao, Xin Luo, and Chunqiang Feng
Solid Earth, 15, 535–554, https://doi.org/10.5194/se-15-535-2024, https://doi.org/10.5194/se-15-535-2024, 2024
Short summary
Short summary
Fractures tend to dominate the mechanical and hydraulic properties of porous rock and impact the scattering characteristics of passing waves. This study takes into account the poroelastic effects of fractures in numerical modeling. Our results demonstrate that scattered waves from complex fracture systems are strongly affected by the fractures.
Farbod Khosro Anjom, Frank Adler, and Laura Valentina Socco
Solid Earth, 15, 367–386, https://doi.org/10.5194/se-15-367-2024, https://doi.org/10.5194/se-15-367-2024, 2024
Short summary
Short summary
Most surface-wave techniques focus on estimating the S-wave velocity (VS) model and consider the P-wave velocity (VP) model as prior information in the inversion step. Here, we show the application of three surface-wave methods to estimate both VS and VP models. We apply the methods to the data from a hard-rock site that were acquired through the irregular source–receiver recording technique. We compare the outcomes and performances of the methods in detail.
Jérémie Giraud, Guillaume Caumon, Lachlan Grose, Vitaliy Ogarko, and Paul Cupillard
Solid Earth, 15, 63–89, https://doi.org/10.5194/se-15-63-2024, https://doi.org/10.5194/se-15-63-2024, 2024
Short summary
Short summary
We present and test an algorithm that integrates geological modelling into deterministic geophysical inversion. This is motivated by the need to model the Earth using all available data and to reconcile the different types of measurements. We introduce the methodology and test our algorithm using two idealised scenarios. Results suggest that the method we propose is effectively capable of improving the models recovered by geophysical inversion and may be applied in real-world scenarios.
Thilo Wrona, Indranil Pan, Rebecca E. Bell, Christopher A.-L. Jackson, Robert L. Gawthorpe, Haakon Fossen, Edoseghe E. Osagiede, and Sascha Brune
Solid Earth, 14, 1181–1195, https://doi.org/10.5194/se-14-1181-2023, https://doi.org/10.5194/se-14-1181-2023, 2023
Short summary
Short summary
We need to understand where faults are to do the following: (1) assess their seismic hazard, (2) explore for natural resources and (3) store CO2 safely in the subsurface. Currently, we still map subsurface faults primarily by hand using seismic reflection data, i.e. acoustic images of the Earth. Mapping faults this way is difficult and time-consuming. Here, we show how to use deep learning to accelerate fault mapping and how to use networks or graphs to simplify fault analyses.
Srishti Singh and Radheshyam Yadav
Solid Earth, 14, 937–959, https://doi.org/10.5194/se-14-937-2023, https://doi.org/10.5194/se-14-937-2023, 2023
Short summary
Short summary
We use numerical models to study the stresses arising from gravitational potential energy (GPE) variations and shear tractions associated with mantle convection in the Zagros–Iran region. The joint models predicted consistent deviatoric stresses that can explain most of the deformation indicators. Stresses associated with mantle convection are found to be higher than those from GPE, thus indicating the deformation in this region may primarily be caused by the mantle, except in eastern Iran.
Sonja H. Wadas, Johanna F. Krumbholz, Vladimir Shipilin, Michael Krumbholz, David C. Tanner, and Hermann Buness
Solid Earth, 14, 871–908, https://doi.org/10.5194/se-14-871-2023, https://doi.org/10.5194/se-14-871-2023, 2023
Short summary
Short summary
The geothermal carbonate reservoir below Munich, Germany, is extremely heterogeneous because it is controlled by many factors like lithology, diagenesis, karstification, and tectonic deformation. We used a 3D seismic single- and multi-attribute analysis combined with well data and a neural-net-based lithology classification to obtain an improved reservoir concept outlining its structural and diagenetic evolution and to identify high-quality reservoir zones in the Munich area.
Mengqi Wang, Lidong Dai, Haiying Hu, Ziming Hu, Chenxin Jing, Chuanyu Yin, Song Luo, and Jinhua Lai
Solid Earth, 14, 847–858, https://doi.org/10.5194/se-14-847-2023, https://doi.org/10.5194/se-14-847-2023, 2023
Short summary
Short summary
This is the first time that the electrical conductivity of gabbroic melt was assessed at high temperature and high pressure. The dependence of electrical conductivity on the degree of depolymerization was also explored. Electrical conductivity of gabbroic melts can be employed to interpret high-conductivity anomalies in the Mohns Ridge of the Arctic Ocean. This is of widespread interest to potential readers in high-pressure rock physics, solid geophysics, and deep Earth science.
Laura Gaßner and Joachim Ritter
Solid Earth, 14, 785–803, https://doi.org/10.5194/se-14-785-2023, https://doi.org/10.5194/se-14-785-2023, 2023
Short summary
Short summary
In this work we analyze signals emitted from wind turbines. They induce sound as well as ground motion waves which propagate through the subsurface and are registered by sensitive instruments. In our data we observe when these signals are present and how strong they are. Some signals are present in ground motion and sound data, providing the opportunity to study similarities and better characterize emissions. Furthermore, we study the amplitudes with distance to improve the signal prediction.
Gesa Franz, Marion Jegen, Max Moorkamp, Christian Berndt, and Wolfgang Rabbel
Solid Earth, 14, 237–259, https://doi.org/10.5194/se-14-237-2023, https://doi.org/10.5194/se-14-237-2023, 2023
Short summary
Short summary
Our study focuses on the correlation of two geophysical parameters (electrical resistivity and density) with geological units. We use this computer-aided correlation to improve interpretation of the Earth’s formation history along the Namibian coast and the associated formation of the South Atlantic Ocean. It helps to distinguish different types of sediment cover and varieties of oceanic crust, as well as to identify typical features associated with the breakup of continents.
Jonathan Ford, Angelo Camerlenghi, Francesca Zolezzi, and Marilena Calarco
Solid Earth, 14, 137–151, https://doi.org/10.5194/se-14-137-2023, https://doi.org/10.5194/se-14-137-2023, 2023
Short summary
Short summary
Submarine landslides commonly appear as low-amplitude zones in seismic data. Previous studies have attributed this to a lack of preserved internal structure. We use seismic modelling to show that an amplitude reduction can be generated even when there is still metre-scale internal structure, by simply deforming the bedding. This has implications for interpreting failure type, for core-seismic correlation and for discriminating landslides from other "transparent" phenomena such as free gas.
Sepidehalsadat Hendi, Mostafa Gorjian, Gilles Bellefleur, Christopher D. Hawkes, and Don White
Solid Earth, 14, 89–99, https://doi.org/10.5194/se-14-89-2023, https://doi.org/10.5194/se-14-89-2023, 2023
Short summary
Short summary
In this study, the modelling results are used to help understand the performance of a helically wound fibre (HWC) from a field study at the New Afton mine, British Columbia. We introduce the numerical 3D model to model strain values in HWC to design more effective HWC system. The DAS dataset at New Afton, interpreted in the context of our modelling, serves as a practical demonstration of the extreme effects of surrounding media and coupling on HWC data quality.
Jérémie Giraud, Hoël Seillé, Mark D. Lindsay, Gerhard Visser, Vitaliy Ogarko, and Mark W. Jessell
Solid Earth, 14, 43–68, https://doi.org/10.5194/se-14-43-2023, https://doi.org/10.5194/se-14-43-2023, 2023
Short summary
Short summary
We propose and apply a workflow to combine the modelling and interpretation of magnetic anomalies and resistivity anomalies to better image the basement. We test the method on a synthetic case study and apply it to real world data from the Cloncurry area (Queensland, Australia), which is prospective for economic minerals. Results suggest a new interpretation of the composition and structure towards to east of the profile that we modelled.
Sonja H. Wadas, Hermann Buness, Raphael Rochlitz, Peter Skiba, Thomas Günther, Michael Grinat, David C. Tanner, Ulrich Polom, Gerald Gabriel, and Charlotte M. Krawczyk
Solid Earth, 13, 1673–1696, https://doi.org/10.5194/se-13-1673-2022, https://doi.org/10.5194/se-13-1673-2022, 2022
Short summary
Short summary
The dissolution of rocks poses a severe hazard because it can cause subsidence and sinkhole formation. Based on results from our study area in Thuringia, Germany, using P- and SH-wave reflection seismics, electrical resistivity and electromagnetic methods, and gravimetry, we develop a geophysical investigation workflow. This workflow enables identifying the initial triggers of subsurface dissolution and its control factors, such as structural constraints, fluid pathways, and mass movement.
Mohammadkarim Karimpour, Evert Slob, and Laura Valentina Socco
Solid Earth, 13, 1569–1583, https://doi.org/10.5194/se-13-1569-2022, https://doi.org/10.5194/se-13-1569-2022, 2022
Short summary
Short summary
Near-surface characterisation is of great importance. Surface wave tomography (SWT) is a powerful tool to model the subsurface. In this work we compare straight-ray and curved-ray SWT at near-surface scale. We apply both approaches to four datasets and compare the results in terms of the quality of the final model and the computational cost. We show that in the case of high data coverage, straight-ray SWT can produce similar results to curved-ray SWT but with less computational cost.
La Ode Marzujriban Masfara, Thomas Cullison, and Cornelis Weemstra
Solid Earth, 13, 1309–1325, https://doi.org/10.5194/se-13-1309-2022, https://doi.org/10.5194/se-13-1309-2022, 2022
Short summary
Short summary
Induced earthquakes are natural phenomena in which the events are associated with human activities. Although the magnitudes of these events are mostly smaller than tectonic events, in some cases, the magnitudes can be high enough to damage buildings near the event's location. To study these (high-magnitude) induced events, we developed a workflow in which the recorded data from an earthquake are used to describe the source and monitor the area for other (potentially high-magnitude) earthquakes.
Evgeniia Martuganova, Manfred Stiller, Ben Norden, Jan Henninges, and Charlotte M. Krawczyk
Solid Earth, 13, 1291–1307, https://doi.org/10.5194/se-13-1291-2022, https://doi.org/10.5194/se-13-1291-2022, 2022
Short summary
Short summary
We demonstrate the applicability of vertical seismic profiling (VSP) acquired using wireline distributed acoustic sensing (DAS) technology for deep geothermal reservoir imaging and characterization. Borehole DAS data provide critical input for seismic interpretation and help assess small-scale geological structures. This case study can be used as a basis for detailed structural exploration of geothermal reservoirs and provide insightful information for geothermal exploration projects.
Brij Singh, Michał Malinowski, Andrzej Górszczyk, Alireza Malehmir, Stefan Buske, Łukasz Sito, and Paul Marsden
Solid Earth, 13, 1065–1085, https://doi.org/10.5194/se-13-1065-2022, https://doi.org/10.5194/se-13-1065-2022, 2022
Short summary
Short summary
Fast depletion of shallower deposits is pushing the mining industry to look for cutting-edge technologies for deep mineral targeting. We demonstrated a joint workflow including two state-of-the-art technologies: full-waveform inversion and reverse time migration. We produced Earth images with significant details which can help with better estimation of areas with high mineralisation, better mine planning and safety measures.
Felix Hloušek, Michal Malinowski, Lena Bräunig, Stefan Buske, Alireza Malehmir, Magdalena Markovic, Lukasz Sito, Paul Marsden, and Emma Bäckström
Solid Earth, 13, 917–934, https://doi.org/10.5194/se-13-917-2022, https://doi.org/10.5194/se-13-917-2022, 2022
Short summary
Short summary
Methods for mineral exploration play an important role within the EU. Exploration must be environmentally friendly, cost effective, and feasible in populated areas. Seismic methods have the potential to deliver detailed images of mineral deposits but suffer from these demands. We show the results for a sparse 3D seismic dataset acquired in Sweden. The 3D depth image allows us to track the known mineralizations beyond the known extent and gives new insights into the geometry of the deposit.
Robert Jackisch, Björn H. Heincke, Robert Zimmermann, Erik V. Sørensen, Markku Pirttijärvi, Moritz Kirsch, Heikki Salmirinne, Stefanie Lode, Urpo Kuronen, and Richard Gloaguen
Solid Earth, 13, 793–825, https://doi.org/10.5194/se-13-793-2022, https://doi.org/10.5194/se-13-793-2022, 2022
Short summary
Short summary
We integrate UAS-based magnetic and multispectral data with legacy exploration data of a Ni–Cu–PGE prospect on Disko Island, West Greenland. The basalt unit has a complex magnetization, and we use a constrained 3D magnetic vector inversion to estimate magnetic properties and spatial dimensions of the target unit. Our 3D modelling reveals a horizontal sheet and a strong remanent magnetization component. We highlight the advantage of UAS use in rugged and remote terrain.
Trond Ryberg, Moritz Kirsch, Christian Haberland, Raimon Tolosana-Delgado, Andrea Viezzoli, and Richard Gloaguen
Solid Earth, 13, 519–533, https://doi.org/10.5194/se-13-519-2022, https://doi.org/10.5194/se-13-519-2022, 2022
Short summary
Short summary
Novel methods for mineral exploration play an important role in future resource exploration. The methods have to be environmentally friendly, socially accepted and cost effective by integrating multidisciplinary methodologies. We investigate the potential of passive, ambient noise tomography combined with 3D airborne electromagnetics for mineral exploration in Geyer, Germany. We show that the combination of the two geophysical data sets has promising potential for future mineral exploration.
Chiara Colombero, Myrto Papadopoulou, Tuomas Kauti, Pietari Skyttä, Emilia Koivisto, Mikko Savolainen, and Laura Valentina Socco
Solid Earth, 13, 417–429, https://doi.org/10.5194/se-13-417-2022, https://doi.org/10.5194/se-13-417-2022, 2022
Short summary
Short summary
Passive-source surface waves may be exploited in mineral exploration for deeper investigations. We propose a semi-automatic workflow for their processing. The geological interpretation of the results obtained at a mineral site (Siilinjärvi phosphorus mine) shows large potentialities and effectiveness of the proposed workflow.
Yueyang Xia, Dirk Klaeschen, Heidrun Kopp, and Michael Schnabel
Solid Earth, 13, 367–392, https://doi.org/10.5194/se-13-367-2022, https://doi.org/10.5194/se-13-367-2022, 2022
Short summary
Short summary
Geological interpretations based on seismic depth images depend on an accurate subsurface velocity model. Reflection tomography is one method to iteratively update a velocity model based on depth error analysis. We used a warping method to estimate closely spaced data-driven depth error displacement fields. The application to a multichannel seismic line across the Sunda subduction zone illustrates the approach which leads to more accurate images of complex geological structures.
Martin Peter Lipus, Felix Schölderle, Thomas Reinsch, Christopher Wollin, Charlotte Krawczyk, Daniela Pfrang, and Kai Zosseder
Solid Earth, 13, 161–176, https://doi.org/10.5194/se-13-161-2022, https://doi.org/10.5194/se-13-161-2022, 2022
Short summary
Short summary
A fiber-optic cable was installed along a freely suspended rod in a deep geothermal well in Munich, Germany. A cold-water injection test was monitored with fiber-optic distributed acoustic and temperature sensing. During injection, we observe vibrational events in the lower part of the well. On the basis of a mechanical model, we conclude that the vibrational events are caused by thermal contraction of the rod. The results illustrate potential artifacts when analyzing downhole acoustic data.
Jean-Baptiste P. Koehl, Craig Magee, and Ingrid M. Anell
Solid Earth, 13, 85–115, https://doi.org/10.5194/se-13-85-2022, https://doi.org/10.5194/se-13-85-2022, 2022
Short summary
Short summary
The present study shows evidence of fault systems (large cracks in the Earth's crust) hundreds to thousands of kilometers long and several kilometers thick extending from northwestern Russia to the northern Norwegian Barents Sea and the Svalbard Archipelago using seismic, magnetic, and gravimetric data. The study suggests that the crust in Svalbard and the Barents Sea was already attached to Norway and Russia at ca. 650–550 Ma, thus challenging existing models.
Andrei Maksymowicz, Daniela Montecinos-Cuadros, Daniel Díaz, María José Segovia, and Tomás Reyes
Solid Earth, 13, 117–136, https://doi.org/10.5194/se-13-117-2022, https://doi.org/10.5194/se-13-117-2022, 2022
Short summary
Short summary
This work analyses the density structure of the continental forearc in the northern segment of the 1960 Mw 9.6 Valdivia earthquake. Results show a segmentation of the continental wedge along and perpendicular to the margin. The extension of the less rigid basement units conforming the marine wedge and Coastal Cordillera domain could modify the process of stress loading during the interseismic periods. This analysis highlights the role of the overriding plate on the seismotectonic process.
Hossein Hassani, Felix Hloušek, Stefan Buske, and Olaf Wallner
Solid Earth, 12, 2703–2715, https://doi.org/10.5194/se-12-2703-2021, https://doi.org/10.5194/se-12-2703-2021, 2021
Short summary
Short summary
Passive seismic imaging methods use natural earthquakes as seismic sources, while in active seismic imaging methods, artificial sources (e.g. explosives) are used to generate seismic waves. We imaged some structures related to a major fault plane through a passive seismic imaging approach using microearthquakes with magnitudes smaller than 0.9 (Mw). These structures have not been illuminated by a previously conducted 3D active seismic survey due to their large dip angles.
Maximilian O. Kottwitz, Anton A. Popov, Steffen Abe, and Boris J. P. Kaus
Solid Earth, 12, 2235–2254, https://doi.org/10.5194/se-12-2235-2021, https://doi.org/10.5194/se-12-2235-2021, 2021
Short summary
Short summary
Upscaling fluid flow in fractured reservoirs is an important practice in subsurface resource utilization. In this study, we first conduct numerical simulations of direct fluid flow at locations where fractures intersect to analyze the arising hydraulic complexities. Next, we develop a model that integrates these effects into larger-scale continuum models of fracture networks to investigate their impact on the upscaling. For intensively fractured systems, these effects become important.
Klaus Regenauer-Lieb, Manman Hu, Christoph Schrank, Xiao Chen, Santiago Peña Clavijo, Ulrich Kelka, Ali Karrech, Oliver Gaede, Tomasz Blach, Hamid Roshan, Antoine B. Jacquey, Piotr Szymczak, and Qingpei Sun
Solid Earth, 12, 1829–1849, https://doi.org/10.5194/se-12-1829-2021, https://doi.org/10.5194/se-12-1829-2021, 2021
Short summary
Short summary
This paper presents a trans-disciplinary approach bridging the gap between observations of instabilities from the molecular scale to the very large scale. We show that all scales communicate via propagation of volumetric deformation waves. Similar phenomena are encountered in quantum optics where wave collisions can release sporadic bursts of light. Ocean waves show a similar phenomenon of rogue waves that seem to come from nowhere. This mechanism is proposed to be the trigger for earthquakes.
Yinshuai Ding and Alireza Malehmir
Solid Earth, 12, 1707–1718, https://doi.org/10.5194/se-12-1707-2021, https://doi.org/10.5194/se-12-1707-2021, 2021
Short summary
Short summary
In this article, we investigate the potential of reverse time migration (RTM) for deep targeting iron oxide deposits and the possible AVO effect that is potentially seen in the common image gathers from this migration algorithm. The results are promising and help to delineate the deposits and host rock structures using a 2D dataset from the Ludvika mines of central Sweden.
Nikita Afonin, Elena Kozlovskaya, Suvi Heinonen, and Stefan Buske
Solid Earth, 12, 1563–1579, https://doi.org/10.5194/se-12-1563-2021, https://doi.org/10.5194/se-12-1563-2021, 2021
Short summary
Short summary
In our study, we show the results of a passive seismic interferometry application for mapping the uppermost crust in the area of active mineral exploration in northern Finland. The obtained velocity models agree well with geological data and complement the results of reflection seismic data interpretation.
Puy Ayarza, José Ramón Martínez Catalán, Ana Martínez García, Juan Alcalde, Juvenal Andrés, José Fernando Simancas, Immaculada Palomeras, David Martí, Irene DeFelipe, Chris Juhlin, and Ramón Carbonell
Solid Earth, 12, 1515–1547, https://doi.org/10.5194/se-12-1515-2021, https://doi.org/10.5194/se-12-1515-2021, 2021
Short summary
Short summary
Vertical incidence seismic profiling on the Iberian Massif images a mid-crustal-scale discontinuity at the top of the reflective lower crust. This feature shows that upper- and lower-crustal reflections merge into it, suggesting that it has often behaved as a detachment. The orogen-scale extension of this discontinuity, present in Gondwanan and Avalonian affinity terranes into the Iberian Massif, demonstrates its relevance, leading us to interpret it as the Conrad discontinuity.
Peter-Lasse Giertzuch, Joseph Doetsch, Alexis Shakas, Mohammadreza Jalali, Bernard Brixel, and Hansruedi Maurer
Solid Earth, 12, 1497–1513, https://doi.org/10.5194/se-12-1497-2021, https://doi.org/10.5194/se-12-1497-2021, 2021
Short summary
Short summary
Two time-lapse borehole ground penetrating radar (GPR) surveys were conducted during saline tracer experiments in weakly fractured crystalline rock with sub-millimeter fractures apertures, targeting electrical conductivity changes. The combination of time-lapse reflection and transmission GPR surveys from different boreholes allowed monitoring the tracer flow and reconstructing the flow path and its temporal evolution in 3D and provided a realistic visualization of the hydrological processes.
Irene Bianchi, Elmer Ruigrok, Anne Obermann, and Edi Kissling
Solid Earth, 12, 1185–1196, https://doi.org/10.5194/se-12-1185-2021, https://doi.org/10.5194/se-12-1185-2021, 2021
Short summary
Short summary
The European Alps formed during collision between the European and Adriatic plates and are one of the most studied orogens for understanding the dynamics of mountain building. In the Eastern Alps, the contact between the colliding plates is still a matter of debate. We have used the records from distant earthquakes to highlight the geometries of the crust–mantle boundary in the Eastern Alpine area; our results suggest a complex and faulted internal crustal structure beneath the higher crests.
Saeid Cheraghi, Alireza Malehmir, Mostafa Naghizadeh, David Snyder, Lucie Mathieu, and Pierre Bedeaux
Solid Earth, 12, 1143–1164, https://doi.org/10.5194/se-12-1143-2021, https://doi.org/10.5194/se-12-1143-2021, 2021
Short summary
Short summary
High-resolution seismic profiles in 2D are acquired in the north and south of the Chibougamau area, Quebec, Canada located in the northeast of the Abitibi Greenstone belt. The area mostly includes volcanic rocks, and both profiles cross over several fault zones. The seismic method is acquired to image the subsurface down to depth of 12 km. The main aim of this study is to image major fault zones and the geological formations connected to those faults to investigate metal endowment in the area.
Jean-Baptiste P. Koehl
Solid Earth, 12, 1025–1049, https://doi.org/10.5194/se-12-1025-2021, https://doi.org/10.5194/se-12-1025-2021, 2021
Short summary
Short summary
By using seismic data and fieldwork, this contribution shows that soft, coal-rich sedimentary rocks absorbed most of early Cenozoic, Eurekan, contractional deformation in central Spitsbergen, thus suggesting that no contractional deformation event is needed in the Late Devonian to explain the deformation differences among late Paleozoic sedimentary rocks. It also shows that the Billefjorden Fault Zone, a major crack in the Earth's crust in Svalbard, is probably segmented.
Gilda Currenti, Philippe Jousset, Rosalba Napoli, Charlotte Krawczyk, and Michael Weber
Solid Earth, 12, 993–1003, https://doi.org/10.5194/se-12-993-2021, https://doi.org/10.5194/se-12-993-2021, 2021
Short summary
Short summary
We investigate the capability of distributed acoustic sensing (DAS) to record dynamic strain changes related to Etna volcano activity in 2019. To validate the DAS measurements, we compute strain estimates from seismic signals recorded by a dense broadband array. A general good agreement is found between array-derived strain and DAS measurements along the fibre optic cable. Localised short wavelength discrepancies highlight small-scale structural heterogeneities in the investigated area.
Klaus Regenauer-Lieb, Manman Hu, Christoph Schrank, Xiao Chen, Santiago Peña Clavijo, Ulrich Kelka, Ali Karrech, Oliver Gaede, Tomasz Blach, Hamid Roshan, and Antoine B. Jacquey
Solid Earth, 12, 869–883, https://doi.org/10.5194/se-12-869-2021, https://doi.org/10.5194/se-12-869-2021, 2021
Short summary
Short summary
In this paper we expand on a recent discovery of slow cross-diffusion hydromechanical waves cast into a new concise reaction–diffusion equation for THMC coupling. If waves are excited through the THMC reaction terms unbounded reactions can be captured by inclusion of statistical information from the lower scale through nonlocal reaction–diffusion equations. These cross-diffusion coefficients regularize extreme earthquake-like events (rogue waves) through a new form of quasi-soliton wave.
Christian Emile Nyaban, Théophile Ndougsa-Mbarga, Marcelin Bikoro-Bi-Alou, Stella Amina Manekeng Tadjouteu, and Stephane Patrick Assembe
Solid Earth, 12, 785–800, https://doi.org/10.5194/se-12-785-2021, https://doi.org/10.5194/se-12-785-2021, 2021
Short summary
Short summary
A multi-scale analysis of aeromagnetic data combining tilt derivative, Euler deconvolution, upward continuation, and 2.75D modelling was applied over Cameroon between the latitudes 5°30'–6° N and the longitudes 13°30'–14°45' E. Major families of faults oriented ENE–WSW, E–W, NW–SE, and N–S with a NE–SW prevalence were mapped. Depths of interpreted faults range from 1000 to 3400 m, mylonitic veins were identified, and 2.75D modelling revealed fault depths greater than 1200 m.
Jennifer E. Cunningham, Nestor Cardozo, Chris Townsend, and Richard H. T. Callow
Solid Earth, 12, 741–764, https://doi.org/10.5194/se-12-741-2021, https://doi.org/10.5194/se-12-741-2021, 2021
Short summary
Short summary
This work investigates the impact of commonly used seismic interpretation methods on the analysis of faults. Fault analysis refers to fault length, displacement, and the impact these factors have on geological modelling and hydrocarbon volume calculation workflows. This research was conducted to give geoscientists a better understanding of the importance of interpretation methods and the impact of unsuitable methology on geological analyses.
Jan Henninges, Evgeniia Martuganova, Manfred Stiller, Ben Norden, and Charlotte M. Krawczyk
Solid Earth, 12, 521–537, https://doi.org/10.5194/se-12-521-2021, https://doi.org/10.5194/se-12-521-2021, 2021
Short summary
Short summary
We performed a seismic survey in two 4.3 km deep geothermal research wells using the novel method of distributed acoustic sensing and wireline cables. The characteristics of the acquired data, methods for data processing and quality improvement, and interpretations on the geometry and structure of the sedimentary and volcanic reservoir rocks are presented. The method enables measurements at high temperatures and reduced cost compared to conventional sensors.
Matthias Bücker, Adrián Flores Orozco, Jakob Gallistl, Matthias Steiner, Lukas Aigner, Johannes Hoppenbrock, Ruth Glebe, Wendy Morales Barrera, Carlos Pita de la Paz, César Emilio García García, José Alberto Razo Pérez, Johannes Buckel, Andreas Hördt, Antje Schwalb, and Liseth Pérez
Solid Earth, 12, 439–461, https://doi.org/10.5194/se-12-439-2021, https://doi.org/10.5194/se-12-439-2021, 2021
Short summary
Short summary
We use seismic, electromagnetic, and geoelectrical methods to assess sediment thickness and lake-bottom geology of two karst lakes. An unexpected drainage event provided us with the unusual opportunity to compare water-borne measurements with measurements carried out on the dry lake floor. The resulting data set does not only provide insight into the specific lake-bottom geology of the studied lakes but also evidences the potential and limitations of the employed field methods.
Alireza Malehmir, Magdalena Markovic, Paul Marsden, Alba Gil, Stefan Buske, Lukasz Sito, Emma Bäckström, Martiya Sadeghi, and Stefan Luth
Solid Earth, 12, 483–502, https://doi.org/10.5194/se-12-483-2021, https://doi.org/10.5194/se-12-483-2021, 2021
Short summary
Short summary
A smooth transition toward decarbonization demands access to more minerals of critical importance. Europe has a good geology for many of these mineral deposits, but at a depth requiring sensitive, environmentally friendly, and cost-effective methods for their exploration. In this context, we present a sparse 3D seismic dataset that allowed identification of potential iron oxide resources at depth and helped to characterise key geological structures and a historical tailing in central Sweden.
Alba Zappone, Antonio Pio Rinaldi, Melchior Grab, Quinn C. Wenning, Clément Roques, Claudio Madonna, Anne C. Obermann, Stefano M. Bernasconi, Matthias S. Brennwald, Rolf Kipfer, Florian Soom, Paul Cook, Yves Guglielmi, Christophe Nussbaum, Domenico Giardini, Marco Mazzotti, and Stefan Wiemer
Solid Earth, 12, 319–343, https://doi.org/10.5194/se-12-319-2021, https://doi.org/10.5194/se-12-319-2021, 2021
Short summary
Short summary
The success of the geological storage of carbon dioxide is linked to the availability at depth of a capable reservoir and an impermeable caprock. The sealing capacity of the caprock is a key parameter for long-term CO2 containment. Faults crosscutting the caprock might represent preferential pathways for CO2 to escape. A decameter-scale experiment on injection in a fault, monitored by an integrated network of multiparamerter sensors, sheds light on the mobility of fluids within the fault.
Juvenal Andrés, Puy Ayarza, Martin Schimmel, Imma Palomeras, Mario Ruiz, and Ramon Carbonell
Solid Earth, 11, 2499–2513, https://doi.org/10.5194/se-11-2499-2020, https://doi.org/10.5194/se-11-2499-2020, 2020
Yi Zhang, Xinglin Lei, Tsutomu Hashimoto, and Ziqiu Xue
Solid Earth, 11, 2487–2497, https://doi.org/10.5194/se-11-2487-2020, https://doi.org/10.5194/se-11-2487-2020, 2020
Short summary
Short summary
Spatially continuous strain responses in two monitoring wells induced by a well-drilling process were monitored using high-resolution fiber-optic distributed strain sensing (DSS). The modeling results suggest that the strain polarities and magnitudes along the wellbores may be indicative of the layered-permeability structure or heterogeneous formation damage. The performance and value of DSS as a novel hydrogeophysical tool for in situ subsurface monitoring are emphasized.
Benjamin Schwarz and Charlotte M. Krawczyk
Solid Earth, 11, 1891–1907, https://doi.org/10.5194/se-11-1891-2020, https://doi.org/10.5194/se-11-1891-2020, 2020
Short summary
Short summary
Intricate fault and fracture networks cut through the upper crust, and their detailed delineation and characterization play an important role in the Earth sciences. While conventional geophysical sounding techniques only provide indirect means of detection, we present scale-spanning field data examples, in which coherent diffraction imaging – a framework inspired by optics and visual perception – enables the direct imaging of these crustal features at an unprecedented spatial resolution.
Laurent Guillou-Frottier, Hugo Duwiquet, Gaëtan Launay, Audrey Taillefer, Vincent Roche, and Gaétan Link
Solid Earth, 11, 1571–1595, https://doi.org/10.5194/se-11-1571-2020, https://doi.org/10.5194/se-11-1571-2020, 2020
Short summary
Short summary
In the first kilometers of the subsurface, temperature anomalies due to heat conduction rarely exceed 20–30°C. However, when deep hot fluids in the shallow crust flow upwards, for example through permeable fault zones, hydrothermal convection can form high-temperature geothermal reservoirs. Numerical modeling of hydrothermal convection shows that vertical fault zones may host funnel-shaped, kilometer-sized geothermal reservoirs whose exploitation would not need drilling at depths below 2–3 km.
Joseph Doetsch, Hannes Krietsch, Cedric Schmelzbach, Mohammadreza Jalali, Valentin Gischig, Linus Villiger, Florian Amann, and Hansruedi Maurer
Solid Earth, 11, 1441–1455, https://doi.org/10.5194/se-11-1441-2020, https://doi.org/10.5194/se-11-1441-2020, 2020
Cited articles
Andrä, H., Combaret, N., Dvorkin, J., Glatt, E., Han, J., Kabel, M., Keehm, Y., Krzikalla, F., Lee, M., Madonna, C., Marsh, M., Mukerji, T., Saenger, E. H., Sain, R., Saxena, N., Ricker, S., Wiegmann, A., and Zhan, X.: Digital rock physics benchmarks – Part II: Computing effective properties, Comput. Geosci., 50, 33–43, 2013a.
Andrä, H., Combaret, N., Dvorkin, J., Glatt, E., Han, J., Kabel, M., Keehm, Y., Krzikalla, F., Lee, M., Madonna, C., Marsh, M., Mukerji, T., Saenger, E. H., Sain, R., Saxena, N., Ricker, S., Wiegmann, A., and Zhan, X.: Digital rock physics benchmarks – Part I: Imaging and segmentation, Comput. Geosci., 50, 25–32, 2013b.
Berg, S., Ott, H., Klapp, S. A., Schwing, A., Neiteler, R., Brussee, N., Makurat, A., Leu, L., Enzmann, F., Schwarz, J.-O., Kersten, M., Irvine, S., and Stampanoni, M.: Real-time 3d imaging of haines jumps in porous media flow, P. Natl. Acad. Sci. USA, 110, 3755–3759, 2013.
Berge, L. I., Jacobsen, K. A., and Solstad, A.: Measured acoustic wave velocities of r11 (ccl3f) hydrate samples with and without sand as a function of hydrate concentration, J. Geophys. Res.-Solid Earth, 104, 15415–15424, 1999.
Best, A., Priest, J., and Clayton, C.: A resonant column study of the seismic properties of methane-hydrate-bearing sand, in: Geophysical characterization of gas hydrates, edited by: Riedel, M., Willoughby, E. C., and Chopra, S., Society of Exploration Geophysicists, 337–347, 2010.
Best, A. I., Priest, J. A., Clayton, C. R. I., and Rees, E. V. L.: The effect of methane hydrate morphology and water saturation on seismic wave attenuation in sand under shallow sub-seafloor conditions, Earth Planet. Sc. Lett., 368, 78–87, 2013.
Bleau, A. and Leon, L. J.: Watershed-based segmentation and region merging, Comput. Vis. Image Und., 3, 317–370, 2000.
Boswell, R. and Collett, T. S.: Current perspectives on gas hydrate resources, Energ. Environ. Sci., 4, 1206–1215, 2011.
Buades, A., Coll, B., and Morel, J.-M.: A non-local algorithm for image denoising, IEEE Computer Society Conference on Computer Vision and Pattern Recognition, San Diego, CA, USA, 60–65, 2005a.
Buades, A., Coll, B., and Morel, J. M.: A review of image denoising algorithms, with a new one, Multiscale Model. Sim., 4, 490–530, 2005b.
Carcione, J. M. and Gei, D.: Gas-hydrate concentration estimated from p- and s-wave velocities at the mallik 2l–38 research well, mackenzie delta, Canada, J. Appl. Geophys., 1, 73–78, 2004.
Chaouachi, M., Falenty, A., Sell, K., Enzmann, F., Kersten, M., Haberthür, D., and Kuhs, W. F.: Microstructural evolution of gas hydrates in sedimentary matrices observed with synchrotron x-ray computed tomographic microscopy, Geochem. Geophy. Geosy., 16, 1711–1722, 2015.
Chazallon, B., Itoh, H., Koza, M., Kuhs, W. F., and Schober, H.: Anharmonicity and guest–host coupling in clathrate hydrates, Phys. Chem. Chem. Phys., 4, 4809–4816, 2002.
Chuvilin, E. M., Istomin, V. A., and Safonov, S. S.: Residual nonclathrated water in sediments in equilibrium with gas hydrate comparison with unfrozen water, Cold Reg. Sci. Technol., 68, 68–73, 2011.
Cnudde, V. and Boone, M. N.: High-resolution x-ray computed tomography in geosciences: A review of the current technology and applications, Earth-Sci. Rev., 123, 1–17, 2013.
Dai, J., Xu, H., Snyder, F., and Dutta, N.: Detection and estimation of gas hydrates using rock physics and seismic inversion: Examples from the northern deepwater gulf of mexico, The Leading Edge, 23, 60–66, 2004.
Dai, S., Santamarina, J. C., Waite, W. F., and Kneafsey, T. J.: Hydrate morphology: Physical properties of sands with patchy hydrate saturation, J. Geophys. Res.-Solid Earth, 117, B11205, https://doi.org/10.1029/2012jb009667, 2012.
Desbois, G., Urai, J. L., PÉRez-Willard, F., Radi, Z., Offern, S., Burkart, I., Kukla, P. A., and Wollenberg, U.: Argon broad ion beam tomography in a cryogenic scanning electron microscope: A novel tool for the investigation of representative microstructures in sedimentary rocks containing pore fluid, J. Microscopy, 249, 215–235, 2013.
Deville, S., Adrien, J., Maire, E., Scheel, M., and Di Michiel, M.: Time-lapse, three-dimensional in situ imaging of ice crystal growth in a colloidal silica suspension, Acta Mater., 61, 2077–2086, 2013.
Dvorkin, J., Nur, A., Uden, R., and Taner, T.: Rock physics of a gas hydrate reservoir, The Leading Edge, 22, 842–847, 2003.
Ecker, C., Dvorkin, J., and Nur, A. M.: Estimating the amount of gas hydrate and free gas from marine seismic data, Geophysics, 65, 565–573, 2000.
Falenty, A., Chaouachi, M., Neher, S. H., Sell, K., Schwarz, J.-O., Wolf, M., Enzmann, F., Kersten, M., Haberthur, D., and Kuhs, W. F.: Stop-and-go in situ tomography of dynamic processes – gas hydrate formation in sedimentary matrices, Acta Crystallogr. A, 71, s154, https://doi.org/10.1107/S2053273315097740, 2015.
Guerin, G. and Goldberg, D.: Modeling of acoustic wave dissipation in gas hydrate-bearing sediments, Geochem. Geophy. Geosy., 6, Q07010, https://doi.org/10.1029/2005gc000918, 2005.
Hansen, T. C., Falenty, A., and Kuhs, W. F.: Lattice constants and expansivities of gas hydrates from 10 k up to the stability limit, J. Chem. Phys., 144, 054301, https://doi.org/10.1063/1.4940729, 2016.
Helgerud, M. B., Waite, W. F., Kirby, S. H., and Nur, A.: Measured temperature and pressure dependence of vp and vs in compacted, polycrystalline si methane and sii methane-ethane hydrate, Can. J. Phys., 81, 47–53, 2003.
Hemes, S., Desbois, G., Urai, J. L., Schröppel, B., and Schwarz, J.-O.: Multi-scale characterization of porosity in boom clay (hades-level, mol, belgium) using a combination of x-ray μ-ct, 2d bib-sem and fib-sem tomography, Micropor. Mesopor. Mat., 208, 1–20, 2015.
Henke, B. L., Gullikson, E. M., and Davis, J. C.: X-ray interactions: Photoabsorption, scattering, transmission, and reflection at e = 50–30 000 ev, z = 1–92, Atom. Data Nucl. Data, 54, 181–342, 1993.
Holzer, L. and Cantoni, M.: Review of fib-tomography, in: Nanofabrication using focused ion and electron beams: Principles and applications, edited by: Utke, I., Moshkalev, S. A., and Russell, P., Oxford University Press, NY, USA, 410–435, 2012.
Hu, G. W., Ye, Y. G., Zhang, J., Liu, C. L., Diao, S. B., and Wang, J. S.: Acoustic properties of gas hydrate-bearing consolidated sediments and experimental testing of elastic velocity models, J. Geophys. Res.-Solid Earth, 115, B02102, https://doi.org/10.1029/2008jb006160, 2010.
Iassonov, P., Gebrenegus, T., and Tuller, M.: Segmentation of x-ray computed tomography images of porous materials: A crucial step for characterization and quantitative analysis of pore structures, Water Resour. Res., 9, W09415, https://doi.org/10.1029/2009WR008087, 2009.
Jin, S., Nagao, J., Takeya, S., Jin, Y., Hayashi, J., Kamata, Y., Ebinuma, T., and Narita, H.: Structural investigation of methane hydrate sediments by microfocus x-ray computed tomography technique under high-pressure conditions, Jpn. J. Appl. Phys., 2, L714–L716, 2006.
Kaestner, A., Lehmann, E., and Stampanoni, M.: Imaging and image processing in porous media research, Adv. Water Resour., 31, 1174–1187, 2008.
Kerkar, P. B., Horvat, K., Jones, K. W., and Mahajan, D.: Imaging methane hydrates growth dynamics in porous media using synchrotron x-ray computed microtomography, Geochem. Geophy. Geosy., 15, 4759–4768, 2014.
Klapp, S. A., Enzmann, F., Walz, P., Huthwelker, T., Tuckermann, J., Schwarz, J. O., Pape, T., Peltzer, E. T., Mokso, R., Wangner, D., Marone, F., Kersten, M., Bohrmann, G., Kuhs, W. F., Stampanoni, M., and Brewer, P. G.: Microstructure characteristics during hydrate formation and dissociation revealed by x-ray tomographic microscopy, Geo-Mar. Lett., 32, 555–562, 2012.
Konno, Y., Jin, Y., Yoneda, J., Kida, M., Egawa, K., Ito, T., Suzuki, K., and Nagao, J.: Effect of methane hydrate morphology on compressional wave velocity of sandy sediments: Analysis of pressure cores obtained in the eastern nankai trough, Mar. Petrol. Geol., 66, 425–433, 2015.
Li, F. G., Sun, C. Y., Zhang, Q., Liu, X. X., Guo, X. Q., and Chen, G. J.: Laboratory measurements of the effects of methane/tetrahydrofuran concentration and grain size on the p wave velocity of hydrate-bearing sand, Energ. Fuels, 25, 2076–2082, 2011.
Liu, Y., Kiss, A. M., Larsson, D. H., Yang, F., and Pianetta, P.: To get the most out of high resolution x-ray tomography: A review of the post-reconstruction analysis, Spectrochim. Acta B, 117, 29–41, 2016.
Madonna, C., Almqvist, B. S. G., and Saenger, E. H.: Digital rock physics: Numerical prediction of pressure-dependent ultrasonic velocities using micro-ct imaging, Geophys. J. Int., 3, 1475–1482, 2012.
Madonna, C., Quintal, B., Frehner, M., Almqvist, B. S. G., Tisato, N., Pistone, M., Marone, F., and Saenger, E. H.: Synchrotron-based x-ray tomographic microscopy for rock physics investigations, Geophysics, 78, 53–64, https://doi.org/10.1190/geo2012-0113.1, 2013.
Marone, F. and Stampanoni, M.: Regridding reconstruction algorithm for real-time tomographic imaging, J. Synchrotron Radiat., 19, 1029–1037, 2012.
Matsushima, J., Suzuki, M., Kato, Y., and Rokugawa, S.: Ultrasonic compressional and shear attenuation measurements in partially frozen consolidated and unconsolidated porous media, J. Geophys. Res., 81, 141–153, 2015.
Moridis, G. J., Collett, T. S., Pooladi-Darvish, M., Hancock, S., Santamarina, C., Boswell, R., Kneafsey, T., Rutqvist, J., Kowalsky, M. B., Reagan, M. T., Sloan, E. D., Sum, A. K., and Koh, C. A.: Challenges, uncertainties, and issues facing gas production from gas-hydrate deposits, SPE Reserv. Eval. Eng., 14, 76–112, 2011.
Murshed, M. M., Klapp, S. A., Enzmann, F., Szeder, T., Huthwelker, T., Stampanoni, M., Marone, F., Hintermuller, C., Bohrmann, G., Kuhs, W. F., and Kersten, M.: Natural gas hydrate investigations by synchrotron radiation x-ray cryo-tomographic microscopy (srxctm), Geophys. Res. Lett., 35, L23612, https://doi.org/10.1029/2008gl035460, 2008.
Paganin, D., Mayo, S. C., Gureyev, T. E., Miller, P. R., and Wilkins, S. W.: Simultaneous phase and amplitude extraction from a single defocused image of a homogeneous object, J. Microsc.-Oxford, 206, 33–40, 2002.
Pak, T., Butler, I. B., Geiger, S., van Dijke, M. I. J., and Sorbie, K. S.: Droplet fragmentation: 3d imaging of a previously unidentified pore-scale process during multiphase flow in porous media, P. Natl. Acad. Sci. USA, 112, 1947–1952, 2015.
Porter, M. L. and Wildenschild, D.: Image analysis algorithms for estimating porous media multiphase flow variables from computed microtomography data: A validation study, Computat. Geosci., 14, 15–30, 2010.
Priest, J. A., Best, A. I., and Clayton, C. R. I.: A laboratory investigation into the seismic velocities of methane gas hydrate-bearing sand, J. Geophys. Res.-Solid Earth, 110, B04102, https://doi.org/10.1029/2004jb003259, 2005.
Priest, J. A., Best, A. I., and Clayton, C. R. I.: Attenuation of seismic waves in methane gas hydrate-bearing sand, Geophys. J. Int., 164, 149–159, 2006.
Priest, J. A., Rees, E. V. L., and Clayton, C. R. I.: Influence of gas hydrate morphology on the seismic velocities of sands, J. Geophys. Res.-Solid Earth, 114, B11205, https://doi.org/10.1029/2009jb006284, 2009.
Ramponi, G.: Warped distance for space-variant linear image interpolation, IEEE Transact. Image Proc., 5, 629–639, 1999.
Reza, A. M.: Realization of the contrast limited adaptive histogram equalization (clahe) for real-time image enhancement, J. VLSI Sig. Proc. Syst., 38, 35–44, 2004.
Riedel, M., Spence, G. D., Chapman, N. R., and Hyndman, R. D.: Seismic investigations of a vent field associated with gas hydrates, offshore vancouver island, J. Geophys. Res.-Solid Earth, 107, 2200, https://doi.org/10.1029/2001JB000269, 2002.
Saenger, E. H., Enzmann, F., Keehm, Y., and Steeb, H.: Digital rock physics: Effect of fluid viscosity on effective elastic properties, J. Appl. Geophys., 4, 236–241, 2011.
Saenger, E. H. and Bohlen, T.: Finite-difference modeling of viscoelastic and anisotropic wave propagation using the rotated staggered grid, Geophysics, 69, 583–591, 2004.
Saenger, E. H., Sell K., and Kersten, M.: On the Effect of Image Enhancement Techniques on Digital Rock Physics Results, 75th EAGE Conference & Exhibition incorporating SPE EUROPEC 2013, Extended Abstract, London, UK, 2013.
Saenger, E. H., Krüger, O. S., and Shapiro, S. A.: Numerical considerations of fluid effects on wave propagation: Influence of the tortuosity, Geophys. Res. Lett., 31, L21613, https://doi.org/10.1029/2004gl020970, 2004.
Sarker, S., Chowdhury, S., Laha, S., and Dey, D.: Use of non-local means filter to denoise image corrupted by salt and pepper noise, SIPIJ Signal & Image Processing: An International Journal, 3, 223–235, 2012.
Schober, H., Itoh, H., Klapproth, A., Chihaia, V., and Kuhs, W. F.: Guest-host coupling and anharmonicity in clathrate hydrates, Eur. Phys. J. E, 12, 41–49, 2003.
Sell, K., Enzmann, F., Spangenberg, E., and Kersten, M.: CO2 injection to a saline aquifer sandstone – clay mineral displacement and permeability changes, 75th EAGE Conference & Exhibition incorporating SPE EUROPEC 2013, Extended Abstract, London, UK, 2013a.
Sell, K., Madonna, C., Quintal, B., Frehner, M., Tisato, N., and Saenger, E. H.: Synchrotron-based x-ray tomographic images and segmentation techniques to account for effects of grain contacts and micro-cracks on rock properties, SBGf International Congress, Rio de Janeiro, Brazil, 26–29 August, 2013b.
Sell, K., Chaouachi, M., Falenty, A., Saenger, E. H., Khan, F., Schwarz, J.-O., Enzmann, F., Kersten, M., and Kuhs, W. F.: Microstructure of hydrate-bearing sediments and determination of p-wave velocities based on high-resolution synchrotron tomographic data, SEG Technical Meeting and Conference, New Orleans, LA, USA, 2015.
Shulakova, V., Pervukhina, M., Müller, T. M., Lebedev, M., Mayo, S., Schmid, S., Golodoniuc, P., De Paula, O. B., Clennell, M. B., and Gurevich, B.: Computational elastic up-scaling of sandstone on the basis of x-ray micro-tomographic images, Geophys. Prospect., 61, 287–301, 2013.
Sloan, E. D. and Koh, C. A.: Clathrate hydrates of natural gases, 3th Edn., Vol. 119, CRC Press, Boca Raton, Fla, 2008.
Spangenberg, E. and Kulenkampff, J.: Influence of methane hydrate content on electrical sediment properties, Geophys. Res. Lett., 33, L24315, https://doi.org/10.1029/2006gl028188, 2006.
Stampanoni, M., Groso, A., Isenegger, A., Mikuljan, G., Chen, Q., Bertrand, A., Henein, S., Betemps, R., Frommherz, U., Böhler, P., Meister, D., Lange, M., and Abela, R.: Trends in synchrotron-based tomographic imaging: The sls experience, SPIE Proceedings, 2006,
Vincent, L. and Soille, P.: Watersheds in digital spaces: An efficient algorithm based on immersion simulations, IEEE T. Pattern Anal., 6, 583–598, 1991.
Waite, W. F., Winters, W. J., and Mason, D. H.: Methane hydrate formation in partially water-saturated ottawa sand, Am. Mineral., 89, 1202–1207, 2004.
Waite, W. F., Santamarina, J. C., Cortes, D. D., Dugan, B., Espinoza, D. N., Germaine, J., Jang, J., Jung, J. W., Kneafsey, T. J., Shin, H., Soga, K., Winters, W. J., and Yun, T. S.: Physical properties of hydrate-bearing sediments, Rev. Geophys., 47, RG4003, https://doi.org/10.1029/2008rg000279, 2009.
Wang, D.: A multiscale gradient algorithm for image segmentation using watersheds, Pattern Recogn., 12, 2043–2052, 1997.
Wang, J.-Q., Zhao, J.-F., Yang, M.-J., Li, Y.-H., Liu, W.-G., and Song, Y.-C.: Permeability of laboratory-formed porous media containing methane hydrate: Observations using x-ray computed tomography and simulations with pore network models, Fuel, 145, 170–179, 2015.
Wang, J., Zhao, J., Zhang, Y., Wang, D., Li, Y., and Song, Y.: Analysis of the effect of particle size on permeability in hydrate-bearing porous media using pore network models combined with ct, Fuel, 136, 34–40, 2016.
Yuan, T., Hyndman, R. D., Spence, G. D., and Desmons, B.: Seismic velocity increase and deep-sea gas hydrate concentration above a bottom-simulating reflector on the northern cascadia continental slope, J. Geophys. Res.-Solid Earth, 101, 13655–13671, 1996.
Yun, T. S., Francisca, F. M., Santamarina, J. C., and Ruppel, C.: Compressional and shear wave velocities in uncemented sediment containing gas hydrate, Geophys. Res. Lett., 32, L10609, https://doi.org/10.1029/2005gl022607, 2005.
Zhang, Q., Li, F. G., Sun, C. Y., Li, Q. P., Wu, X. Y., Liu, B., and Chen, G. J.: Compressional wave velocity measurements through sandy sediments containing methane hydrate, Am. Mineral., 96, 1425–1432, 2011.
