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Bellezza, Cinzia (author), Barison, Erika (author), Farina, Biancamaria (author), Poletto, Flavio (author), Meneghini, Fabio (author), Böhm, Gualtiero (author), Draganov, D.S. (author), Janssen, M.T.G. (author), van Otten, Gijs (author)Geothermal power production may result in significant CO2 emissions as part of the produced steam. CO2 capture, utilisation, subsurface storage (CCUS) and developments to exploit geothermal resources are focal points for future clean and renewable energy strategies. The Synergetic Utilisation of CO2 Storage Coupled with Geothermal Energy...journal article 2024
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Shirmohammadi, F. (author), Draganov, D.S. (author), Veltmeijer, A.V. (author), Naderloo, M. (author), Barnhoorn, A. (author)Seismic interferometry (SI) retrieves new seismic responses, for example reflections, between either receivers or sources. When SI is applied to a reflection survey with active sources and receivers at the surface, non-physical (ghost) reflections are retrieved as well. Ghost reflections, retrieved from the correlation of two primary...journal article 2024
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Shirmohammadi, F. (author), Draganov, D.S. (author), Ghose, R. (author)Seismic interferometry (SI) retrieves the Green function between two receiver locations using their recordings from a boundary of sources. When using sources and receivers only at the surface, the virtual-source gathers retrieved by SI contain pseudo-physical reflections as well as ghost (non-physical) reflections. These ghost reflections are...journal article 2024
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Shirmohammadi, F. (author), Draganov, D.S. (author), Veltmeijer, A.V. (author), Naderloo, M. (author), Barnhoorn, A. (author)Seismic interferometry (SI) retrieves new seismic responses between receivers or sources using, e.g., cross-correlation. Applying SI to a reflection survey with active sources and receivers at the surface, one retrieves ghost reflections besides the physical reflections. Ghost reflections are retrieved from the correlation of two primary...conference paper 2023
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Buisman, M. (author), Draganov, D.S. (author), Kirichek, Alex (author)We show results of of using distributed acoustic sensing (DAS) for continuous relative water-column changes monitoring by relating the oscillating frequencies to measurements of a nearby tidal-station. The oscillations have a great qualitative agreement with the tidal-station, having a period of 12 hours and 25 minutes. No calibration is...conference paper 2023
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Chapeland, C.G.M. (author), Verschuur, D.J. (author), Draganov, D.S. (author)Poor knowledge of source and receiver positions in ultra-high-resolution marine seismic data is the cause of severe damage which requires novel processing techniques to mitigate. This type of seismic data is highly relevant for ultra-shallow subsurface imaging in geo-engineering projects both offshore and in harbours. Current positioning...conference paper 2023
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Draganov, D.S. (author), Naranjo, D. (author), Polychronopoulou, Katerina (author), Weemstra, C. (author)Geothermal energy is a cleaner and more sustainable source of power, which plays a key role in the transition to a low-carbon economy. Sustainable and safe exploitation of geothermal resources, however, depends on our ability to understand and manage the associated seismic risks. In 2018, Nature's Heat geothermal project began operations in...abstract 2023
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Polychronopoulou, Katerina (author), Malinowski, Michal (author), Cyz, Marta (author), Martakis, Nikos (author), Apostolopoulos, George (author), Draganov, D.S. (author)As the global need for aluminum constantly rises, bauxite is considered to be a critical mineral, and the mining industry is in search of new and effective exploration solutions. In this context, we design and implement a purely earthquake-based passive seismic survey at the Gerolekas bauxite mining site in Greece. It is a very difficult...journal article 2023
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Shirmohammadi, F. (author), Draganov, D.S. (author)High-resolution seismic reflections are essential for imaging and monitoring applications using data-driven methods such as seismic interferometry (SI) and Marchenko redatuming. For seismic land surveys using sources and receivers at the surface, the surface waves are the dominant noises that mask the reflections. We use SI to suppress surface...abstract 2023
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Panea, Ionelia (author), Draganov, D.S. (author), Bouaru, Catalin Florin (author), Munteanu, Ioan (author)The Ţicău area (NW Romania) is part of the collisional zone between the Tisza and Dacia mega-units. Imaging of Ţicău area's subsurface geological structure will contribute to the understanding of the processes, which controlled its tectonic evolution. Analysis of outcrops provides accurate information for the building of kinematic sections...journal article 2023
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Zuniga, Nelson Ricardo Coelho Flores (author), Draganov, D.S. (author), Ghose, R. (author)Using the critical angle information of a reflection event, it is possible to calculate several essential physical parameters that are key to reliable geological characterization of the subsurface. However, estimation of the critical angle usually requires several steps of seismic processing. For this reason, an approach which is capable of...journal article 2023
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Zuniga, Nelson Ricardo Coelho Flores (author), Draganov, D.S. (author), Ghose, R. (author)Using post-critical reflection data, it is possible to obtain useful information that allows more reliable geological characterization of the subsurface. However, the strong distortion caused by the phase shift in post-critical wavelets makes the use of post-critical reflections rather challenging. For this reason, an approach which is...journal article 2023
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Janssen, M.T.G. (author), Draganov, D.S. (author), Barnhoorn, A. (author), Wolf, K.H.A.A. (author)As part of a seismic monitoring project in a geothermal field, where the feasibility of re-injection and storage of produced CO<sub>2</sub> is being investigated, a P- and S-wave seismic velocity characterisation study was carried out. The effect of axial and radial (up to 42 MPa) stress, pore pressure (up to 17 MPa), pore fluid (100% brine...journal article 2023
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Chamarczuk, Michał (author), Draganov, D.S. (author), Quiros, Diego (author), Malinowski, Michał (author)Most of the ambient-noise studies are performed with sensor arrays located at the surface. Passive recordings containing seismic arrivals from subsurface sources could be seen as having a geometry resembling reverse vertical seismic profiling (RVSP). In such scenarios, the intersource seismic-interferometry technique can be used to redatum...journal article 2022
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Ma, X. (author), Kirichek, Alex (author), Heller, H.K.J. (author), Draganov, D.S. (author)Fluid mud plays an important role in navigability in ports and waterways. Characterizing and monitoring the seismic properties of the fluid mud can help understand its geotechnical behavior. Estimation of the wave velocities in fluid mud with high accuracy and repeatability enables investigating the behavior of parameters like the yield stress...journal article 2022
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Buisman, M. (author), Martuganova, E.M. (author), Draganov, D.S. (author), Kirichek, Alex (author)Monitoring the nautical depth is vital for the safe passage of water transport. Port authorities worldwide have different navigable depth criteria and use various methods to ensure the safe navigability and manoeuvrability of ships in ports and waterways. These measurements often require a surveying vessel and are limited in repeatability and...conference paper 2022
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Hassing, S.H.W. (author), Draganov, D.S. (author), Barnhoorn, A. (author), Janssen, M. (author)In July 2021, passive seismic data has been recorded on a network of geophones at the CarbFix2 injection site at Hellisheiði, Iceland. This data is processed using seismic interferometry to get an image of the injection reservoir. The data is split up into noise panels. Panels dominated by body-wave energy are selected using an illumination...conference paper 2022
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Naranjo, D. (author), Draganov, D.S. (author), Weemstra, C. (author)In 2018, a geothermal doublet started operating in Kwinstheul, Netherlands, for supplying heat to 64 hectares of greenhouses corresponding to Nature’s Heat joint initiative. This kind of geothermal operation requires extraction, circulation, and reinjection of fluids at a depth of 2.4 km. The reservoir used for the geothermal operation has shown...abstract 2022
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Janssen, M.T.G. (author), Draganov, D.S. (author), Bos, Jordan (author), Farina, B. (author), Barnhoorn, A. (author), Poletto, F. (author), Van Otten, G. (author), Wolf, K.H.A.A. (author), Durucan, S. (author)In the ACT Consortium funded project SUCCEED, researchers study the potential for monitoring the process of (re-)injecting produced and captured CO2 into the Hellisheiði geothermal field for the aid of enhancing geothermal deployment as well as permanently storing CO2 through mineralization. The Hellisheiði site provides an excellent opportunity...conference paper 2022
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Liu, J. (author), Draganov, D.S. (author), Ghose, R. (author)Seismic incoherent noise and waves scattered from objects in the crossline directions can cause 2D elastic full-waveform inversion (FWI) to produce artifacts in the resulting 2D models. We develop a complete workflow that can determine subsurface S-wave velocity (VS) models inverted from 2D near-surface seismic data more stably. We make use...journal article 2022