Searched for: author%3A%22Draganov%2C+D.S.%22
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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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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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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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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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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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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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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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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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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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Muntendam-Bos, A.G. (author), Hoedeman, Gerco (author), Polychronopoulou, Katerina (author), Draganov, D.S. (author), Weemstra, C. (author), van der Zee, Wouter (author), Bakker, R.R. (author), Roest, J.C. (author)
We present an overview of induced seismicity due to subsurface engineering in the Netherlands. Our overview includes events induced by gas extraction, underground gas storage, geothermal heat extraction, salt solution mining and post-mining water ingress. Compared to natural seismicity, induced events are usually small (magnitudes ≤ 4.0)....
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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Chamarczuk, Michal (author), Malinowski, Michal (author), Draganov, D.S. (author), Koivisto, Emilia (author), Heinonen, Suvi (author), Rötsä, Sanna (author)
For the first time, we apply a full-scale 3D seismic virtual-source survey (VSS) for the purpose of near-mine mineral exploration. The data were acquired directly above the Kylylahti underground mine in Finland. Recorded ambient noise (AN) data are characterized using power spectral density (PSD) and beamforming. Data have the most energy at...
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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Liu, J. (author), Ghose, R. (author), Draganov, D.S. (author)
Traditional least-squares full-waveform inversion (FWI) suffers from severe local minima problems in case of the presence of strongly dispersive surface waves. Additionally, recorded wavefields are often characterized by amplitude errors due to varying source coupling and incorrect 3D-to-2D geometrical-spreading correction. Thus, least...
journal article 2022
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Buisman, M. (author), Martuganova, E.M. (author), Kiers, Tjeerd (author), Draganov, D.S. (author), Kirichek, Alex (author)
Purpose<br/><br/>Current surveying techniques used by port authorities to estimate the nautical depth are limited in depth resolution and temporal resolution. Because of this, certain heavily occupied quay walls cannot be optimised in terms of utilisation. Therefore, a permanent continuous measuring system with a higher depth resolution is...
journal article 2022
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Draganov, D.S. (author), Ma, X. (author), Heller, H.K.J. (author), Kirichek, Alex (author)
Knowledge about the characteristics of fluid mud in ports and waterways would allow safer navigating through fluid mud. The properties of the fluid mud determine the feasibility of navigating vessels through the fluid mud. Seismic waves have the potential to help characterize the fluid-mud layers, especially when both P- and S-waves are used....
conference paper 2022
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Hupe, T. (author), Orlowsky, D. (author), Draganov, D.S. (author)
To test passive seismic interferometry (PSI) in underground mining environments, we carried out an active-source seismic and continuous noise measurement in a mine gallery of a former radioactive waste repository - the Asse II salt mine (Lower Saxony, Germany). To analyze the active-source data, we process the data inspired by conventional...
conference paper 2022
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