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Major, Márton (author), Daniilidis, Alexandros (author), Hansen, Thomas Mejer (author), Khait, M. (author), Voskov, D.V. (author)Focus is on comparing stochastic, process-based and deterministic methods for modelling heterogeneity in hydraulic properties of fluvial geothermal reservoirs. Models are considered a generalized representation of a fluvial sequence in the upper part of the Gassum Formation in northern Denmark. Two ensemble realizations of process-based and...journal article 2023
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Li, Longlong (author), Khait, M. (author), Voskov, D.V. (author), Terekhov, Kirill M. (author), Abushaikha, Ahmad (author)We apply Massively Parallel Interface for MPFA-O scheme with state-of-the-art Operator-Based Linearization (OBL) approach for multiphase flow in porous media. The implementation of MPFA-O scheme enhances the modelling capabilities for non-K-orthogonal mesh. A fully implicit scheme is applied to guarantee the stability of solutions when a mass...journal article 2023
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Mansour Pour, K. (author), Voskov, D.V. (author), Bruhn, D.F. (author)Simulation of CO<sub>2</sub> utilization and storage (CCUS) in subsurface reservoirs with complex heterogeneous structures requires a model that captures multiphase compositional flow and transport. Accurate simulation of these processes necessitates the use of stable numerical methods that are based on an implicit treatment of the flux term...journal article 2023
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Lyu, X. (author), Voskov, D.V. (author)A consistent thermodynamic model based on a combination of the Peng-Robinson equation of state for gas components with an activity model for the aqueous phase is utilized in this study to accurately evaluate the performance of geologic CO<sub>2</sub> storage in saline aquifers. To account for thermal effects, the phase enthalpy and...journal article 2023
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Mansour Pour, K. (author), Voskov, D.V. (author), Bruhn, D.F. (author)The energy transition is inevitable since approximately two-thirds of the current global GHG emissions are related to energy production. Subsurface can provide a great opportunity for innovative low-carbon energy solutions such as geothermal energy production, hydrogen storage, carbon capture, and sequestration, etc. Well and borehole...journal article 2023
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Tripuraneni, S. R. T. (author), Novikov, A. (author), Voskov, D.V. (author)Elliptic differential operators describe a wide range of processes in mechanics relevant to geo-energy applications. Extensively used in reservoir modeling, the Finite Volume Method with TPFA can be consistently applied to discretize only a specific type of application under severe assumptions. In this paper, we introduce a positivity...journal article 2023
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Wapperom, M.B. (author), Tian, X. (author), Novikov, A. (author), Voskov, D.V. (author)In this work, we describe our decisions made to perform the FluidFlower simulation study and discuss various aspects of the benchmark that are different from our usual subsurface simulation practice. We will discuss the impact of various modeling choices on the outcomes of the simulation models, such as gridding, discretization, and solver...journal article 2023
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Wang, Y. (author), Voskov, D.V. (author), Daniilidis, Alexandros (author), Khait, M. (author), Saeid, S. (author), Bruhn, D.F. (author)The efficient operation and management of a geothermal project can be largely affected by geological, physical, operational and economic uncertainties. Systematic uncertainty quantification (UQ) involving these parameters helps to determine the probability of the focused outputs, e.g., energy production, Net Present Value (NPV), etc. However,...journal article 2023
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Hampson, G. (author), Martinius, A.W. (author), Jackson, M. (author), Krevor, S. (author), Storms, J.E.A. (author), Voskov, D.V. (author), Hajibeygi, H. (author), Geiger, S. (author)This poster outlines a hierarchical, multiscale modelling approach that is adapted from proven hydrocarbon reservoir characterization workflows to determine which 3D sedimentological and stratigraphic heterogeneity types at which temporal and spatial scales and in which configurations are most important for successful long-term CO2 storage. The...conference paper 2023
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Flemisch, Bernd (author), Nordbotten, Jan M. (author), Geiger, S. (author), Hajibeygi, H. (author), Tian, X. (author), Voskov, D.V. (author), Wang, Y. (author), Wapperom, M.B. (author), Zhang, Z. (author)Successful deployment of geological carbon storage (GCS) requires an extensive use of reservoir simulators for screening, ranking and optimization of storage sites. However, the time scales of GCS are such that no sufficient long-term data is available yet to validate the simulators against. As a consequence, there is currently no solid basis...journal article 2023
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Wapperom, M.B. (author), Lyu, X. (author), Nichita, D. V. (author), Voskov, D.V. (author)In this work, we present a unified framework for the simulation of CO<sub>2</sub> sequestration problems at various time and space scales. The parametrization technique utilizes thermodynamic state-dependent operators expressing the governing equations for the thermal-compositional-reactive system to solve the nonlinear problem. This approach...conference paper 2023
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Tian, X. (author), Voskov, D.V. (author)In this paper, we present an efficient inverse modeling framework for energy transition applications. The key feature of this framework is a combination of adjoint gradients and Operator-based Linearization (OBL) technique to achieve high efficiency in inverse modeling based on forward simulations. This framework allows conducting the history...conference paper 2023
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Hadjisotiriou, George (author), Mansour Pour, K. (author), Voskov, D.V. (author)In this study, we utilize deep neural networks to approximate operators of a nonlinear partial differential equation (PDE), within the Operator-Based Linearization (OBL) simulation framework, and discover the physical space for a physics-based proxy model with reduced degrees of freedom. In our methodology, observations from a high-fidelity...conference paper 2023
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de Hoop, S. (author), Voskov, D.V. (author), Bertotti, G. (author), Barnhoorn, A. (author)Fracture networks are abundant in subsurface applications (e.g., geothermal energy production, CO<sub>2</sub> sequestration). Fractured reservoirs often have a very complex structure, making modeling flow and transport in such networks slow and unstable. Consequently, this limits our ability to perform uncertainty quantification and increases...journal article 2022
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Novikov, A. (author), Voskov, D.V. (author), Khait, M. (author), Hajibeygi, H. (author), Jansen, J.D. (author)We present a scalable collocated Finite Volume Method (FVM) to simulate induced seismicity as a result of pore pressure changes. A discrete system is obtained based on a fully-implicit fully-coupled description of flow, elastic deformation, and contact mechanics at fault surfaces on a flexible unstructured mesh. The cell-centered collocated...journal article 2022
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Wang, Y. (author), Voskov, D.V. (author)Simulation of heat production in high-enthalpy geothermal systems is associated with a complex physical process in which cold water invades steam-saturated control volumes. The fully implicit, fully coupled numerical strategy is commonly adopted to solve the governing system composed of mass and energy conservation equations. A conventional...journal article 2022
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Tian, X. (author), Voskov, D.V. (author)In this paper, we describe adjoint gradient formulation for the Operator-Based Linearization modeling approach. Adjoint gradients are implemented in Delft Advanced Research Terra Simulator (DARTS) framework and applied for history matching using a proxy methodology. Due to the application of adjoint gradients, the computational efficiency of...journal article 2022
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Shokrollahzadeh Behbahani, S. (author), Hajibeygi, H. (author), Voskov, D.V. (author), Jansen, J.D. (author)A smoothed embedded finite-volume modeling (sEFVM) method is presented for faulted and fractured heterogeneous poroelastic media. The method casts a fully coupled strategy to treat the coupling between fault slip mechanics, deformation mechanics, and fluid flow equations. This ensures the stability and consistency of the simulation results,...journal article 2022
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MR. SERRAO SEABRA, G.S.S. (author), de Hoop, S. (author), Voskov, D.V. (author), Vossepoel, F.C. (author)Naturally fractured reservoirs can pose challenges for energy operations such as hydrocarbon production, CO2 storage, and geothermal energy production. Fluid flow in these reservoirs is greatly affected by fracture properties such as orientation and aperture, whose magnitude is mainly influenced by the stresses on the reservoir rocks. Simulating...conference paper 2022
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Wapperom, M.B. (author), Lyu, X. (author), Voskov, D.V. (author)During injection of supercritical CO2 into saline aquifers or depleted gas reservoirs, the complex interaction of CO2 and impurities with reservoir fluids plays a very important role and can significantly alternate the injectivity. Brine evaporation into the CO2-rich phase can lead to salt precipitation which will reduce the effective...conference paper 2022