Application of the Reservoir Simulator MUFITS for 3D Modelling of CO2 Storage in Geological Formations

Afanasyev, Andrey

doi:10.1016/j.egypro.2013.08.042

Cited by 25 publications

(19 citation statements)

References 10 publications

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“…Therefore, MUFITS can be used to describe single-, two-and three-phase states of mixtures under a wide range of pressures and temperatures, minimizing numerical convergence issues [38][39][40]43]. A detailed description and the corresponding problem solution method as formulated in Equations (2)-(4) is given by Afanasyev [41].…”

Section: Methods and Numerical Model Descriptionmentioning

confidence: 99%

“…A detailed description and the corresponding problem solution method as formulated in Equations (2)-(4) is given by Afanasyev [41]. For the modeling of water flow in porous media, mass (Equation (5)) and energy conservation equations (Equation (6)) are used to maintain mass balances, while Darcy's law (Equation (7)) is employed for fluid transport [38,42]:…”

Section: Methods and Numerical Model Descriptionmentioning

confidence: 99%

“…In this case, a transition from subcritical to supercritical mixture properties occurs, demanding non-isothermal compositional multiphase flow simulations to account for three-phase water flow, including the occurring phase transitions. In the present study, we applied the numerical simulator MUFITS (Multiphase Filtration Transport Simulator) [38] for modeling the thermodynamic processes in the UCG reactor vicinity. MUFITS is a scientific multiphase flow simulator and provides different modules for the analysis of non-isothermal multiphase flows in porous media [38][39][40].…”

Section: Methods and Numerical Model Descriptionmentioning

confidence: 99%

“…In the present study, we applied the numerical simulator MUFITS (Multiphase Filtration Transport Simulator) [38] for modeling the thermodynamic processes in the UCG reactor vicinity. MUFITS is a scientific multiphase flow simulator and provides different modules for the analysis of non-isothermal multiphase flows in porous media [38][39][40]. In contrast to the classic numerical approach, wherein pressure and temperature are used to determine the multiphase thermodynamic equilibrium, MUFITS uses pressure-enthalpy-mixture compositional variables [38,41].…”

Section: Methods and Numerical Model Descriptionmentioning

confidence: 99%

“…The potential (Equation (1)) is represented using a polynomial spline in the (P, h, x) space, for which coefficients are calculated before the hydrodynamic simulations [42]. The thermodynamic potential is used in the conditional extremum problem (Equations (2)- (4)), which corresponds to the entropy maximum conditions in the thermodynamic equilibrium (P, h t , x t = constant, t denotes the total parameters of the mixture) [38,42]:…”

Section: Methods and Numerical Model Descriptionmentioning

confidence: 99%

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Prediction of Steam Jacket Dynamics and Water Balances in Underground Coal Gasification

Otto

Kempka

2017

Energies

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Underground coal gasification (UCG) converts coal to a high-calorific synthesis gas for the production of fuels or chemical feedstock. UCG reactors are generally operated below hydrostatic pressure to avoid leakage of UCG fluids into overburden aquifers. Additionally, fluid flow out of and into the reactor is also determined by the presence of the steam jacket, emerging in close reactor vicinity due to the high temperatures generated in UCG operation. Aiming at improving the understanding of the substantial role of the steam jacket in UCG operations, we employ numerical non-isothermal multiphase flow simulations to assess the occurring multiphase fluid flow processes. For that purpose, we first validate our modeling approach against published data on the U.S. UCG field trials at Hanna and Hoe Creek, achieving a very good agreement between our simulation and the observed water balances. Then, we discuss the effect of coal seam permeability and UCG reactor pressure on the dynamic multiphase flow processes in the reactor's vicinity. The presented modeling approach allows for the quantification and prediction of time-dependent temperature and pressure distributions in the reactor vicinity, and thus steam jacket dynamics as well as reactor water inand outflows.

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Section: Methods and Numerical Model Descriptionmentioning

confidence: 99%

Section: Methods and Numerical Model Descriptionmentioning

confidence: 99%

Section: Methods and Numerical Model Descriptionmentioning

confidence: 99%

Section: Methods and Numerical Model Descriptionmentioning

confidence: 99%

Section: Methods and Numerical Model Descriptionmentioning

confidence: 99%

See 3 more Smart Citations

Prediction of Steam Jacket Dynamics and Water Balances in Underground Coal Gasification

Otto

Kempka

2017

Energies

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Nonlinear Finite-Volume Scheme for Complex Flow Processes on Corner-Point Grids

Schneider

Gläser

Flemisch

et al. 2017

Springer Proceedings in Mathematics &Amp; Statistics

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Hydrothermal alteration of kimberlite by convective flows of external water

Afanasyev

Melnik

Porritt

et al. 2014

Contrib Mineral Petrol

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Kimberlite volcanism involves the emplacement of olivine-rich volcaniclastic deposits into volcanic vents or pipes. Kimberlite deposits are typically pervasively serpentinised as a result of the reaction of olivine and water within a temperature range of 130–400 °C or less. We present a model for the influx of ground water into hot kimberlite deposits coupled with progressive cooling and serpentisation. Large-pressure gradients cause influx and heating of water within the pipe with horizontal convergent flow in the host rock and along pipe margins, and upward flow within the pipe centre. Complete serpentisation is predicted for wide ranges of permeability of the host rocks and kimberlite deposits. For typical pipe dimensions, cooling times are centuries to a few millennia. Excess volume of serpentine results in filling of pore spaces, eventually inhibiting fluid flow. Fresh olivine is preserved in lithofacies with initial low porosity, and at the base of the pipe where deeper-level host rocks have low permeability, and the pipe is narrower leading to faster cooling. These predictions are consistent with fresh olivine and serpentine distribution in the Diavik A418 kimberlite pipe, (NWT, Canada) and with features of kimberlites of the Yakutian province in Russia affected by influx of ground water brines. Fast reactions and increases in the volume of solid products compared to the reactants result in self-sealing and low water–rock ratios (estimated at <0.2). Such low water–rock ratios result in only small changes in stable isotope compositions; for example, δO18 is predicted only to change slightly from mantle values. The model supports alteration of kimberlites predominantly by interactions with external non-magmatic fluids.

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Application of the Reservoir Simulator MUFITS for 3D Modelling of CO2 Storage in Geological Formations

Cited by 25 publications

References 10 publications

Prediction of Steam Jacket Dynamics and Water Balances in Underground Coal Gasification

Prediction of Steam Jacket Dynamics and Water Balances in Underground Coal Gasification

Nonlinear Finite-Volume Scheme for Complex Flow Processes on Corner-Point Grids

Hydrothermal alteration of kimberlite by convective flows of external water

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