Searched for: author%3A%22Draganov%2C+D.S.%22
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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), 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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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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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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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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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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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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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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Hupe, T.-J. (author), Draganov, D.S. (author), Orlowsky, D. (author)
As part of the European research project Seismic Imaging Techniques for Mineral Exploration (SIT4ME), in-mine seismic active-source and continuous noise measurements were performed within an underground mine gallery of a former radioactive waste repository – the Asse II salt mine (Lower Saxony, Germany) to investigate its geological conditions....
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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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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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
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Chamarczuk, M. (author), Malinowski, M. (author), Draganov, D.S. (author), Grant, A. (author), Asgharzadeh, M. (author), Urosevic, M. (author)
Here we analyse ambient noise (AN) data generated during drilling of exploration boreholes and recorded using a dense array deployed over one of the numerous shallow iron-ore mineralization targets in the Pilbara region (Western Australia). Drilling and drilling-related operations were reoccurring in a sequence as described by the drillers’...
journal article 2021
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Liu, J. (author), Draganov, D.S. (author), Ghose, R. (author), Bourgeois, Q. (author)
Detecting small-size objects is a primary challenge at archaeological sites due to the high degree of heterogeneity present in the near surface. Although high-resolution reflection seismic imaging often delivers the target resolution of the subsurface in different near-surface settings, the standard processing for obtaining an image of the...
journal article 2021
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Ma, X. (author), Kirichek, Alex (author), Shakeel, A. (author), Heller, H.K.J. (author), Draganov, D.S. (author)
The velocities of the seismic waves propagating in the fluid-mud layer are governed by the rheological properties and density of the fluid mud. Performing seismic transmission measurements inside the fluid mud can give good estimates of the seismic velocities and, thus, of the rheological properties and density. Laboratory ultrasonic...
journal article 2021
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Janssen, M.T.G. (author), Barnhoorn, A. (author), Draganov, D.S. (author), Wolf, K.H.A.A. (author), Durucan, Sevket (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 (up to 95 MPa) and radial (up to 60 MPa) stress on the seismic velocity was studied in...
journal article 2021
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Shirmohammadi, F. (author), Draganov, D.S. (author), Hatami, Mohammad Reza (author), Weemstra, C. (author)
Seismic interferometry (SI) refers to the principle of generating new seismic responses using crosscorrelations of existing wavefield recordings. In this study, we report on the use of a specific interferometric approach, called seismic interferometry by multidimensional deconvolution (SI by MDD), for the purpose of retrieving surface-wave...
journal article 2021
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