Numerical analysis of thermal effects during carbon dioxide injection with enhanced gas recovery: a theoretical case study for the Altmark gas field

Singh, Ashok Kumar; Baumann, Gunther; Henninges, Jan; Görke, Uwe–Jens; Kolditz, Olaf

doi:10.1007/s12665-012-1689-9

Cited by 26 publications

(14 citation statements)

References 40 publications

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“…OGS has a built-in random-walk particle tracking method for Euler-Lagrange simulations [97] and can simulate incompressible and compressible flow [98], densitydependent flow [99], unsaturated flow [100], two-phase flow [101,102], and overland flow [103]. All flow model components are available for non-isothermal conditions and for deformable porous media.…”

Section: Opengeosysmentioning

confidence: 99%

Reactive transport codes for subsurface environmental simulation

et al. 2014

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A general description of the mathematical and numerical formulations used in modern numerical reactive transport codes relevant for subsurface environmental simulations is presented. The formulations are followed by short descriptions of commonly used and available subsurface simulators that consider continuum representations of flow, transport, and reactions in porous media. These formulations are applicable to most of the subsurface environmental benchmark problems included in this special issue. The list of codes described briefly here includes PHREEQC, HPx, PHT3D, OpenGeoSys (OGS), HYTEC, ORCHESTRA, TOUGHREACT, eSTOMP, HYDROGEOCHEM, CrunchFlow, MIN3P, and PFLOTRAN. The descriptions include a C. I. Steefel ( ) · B. Arora · S. Molins · N. Spycher

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Section: Opengeosysmentioning

confidence: 99%

Reactive transport codes for subsurface environmental simulation

et al. 2014

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“…The H 2 O is assumed to be residually trapped and immobile such that θ w ρ w is constant (Singh et al 2011(Singh et al , 2012. The volume fraction of the rock is θ r = 1 − φ, where φ [-] is the porosity, and the product θ r ρ r is also constant.…”

Section: The Mathematical Modelmentioning

confidence: 99%

“…Andre et al 2010;Mathias et al 2013a). Exceptions to these include Han et al (2012), who considered a minimum initial pressure of 6.89 MPa, Ziabaksh-Ganji & Kooi (2014), who assumed an initial pressure of 6 MPa, Afanasyev (2013), who assumed a minimum initial pressure of 4.5 MPa, and Singh, Goerke & Kolditz (2011) and Singh et al (2012), who considered an initial pressure of 4 MPa. However, depleted gas reservoirs are often abandoned at pressures lower than 1 MPa.…”

Section: Introductionmentioning

confidence: 99%

Heat transport and pressure buildup during carbon dioxide injection into depleted gas reservoirs

2014

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In this article, a two-layer vertical equilibrium model for the injection of carbon dioxide into a low-pressure porous reservoir containing methane and water is developed. The dependent variables solved for include pressure, temperature and CO 2 -CH 4 interface height. In contrast to previous two-layer vertical equilibrium models in this context, the compressibility of all material components is fully accounted for. Non-Darcy effects are also considered using the Forchheimer equation. The results show that, for a given injection scenario, as the initial pressure in the reservoir decreases, both the pressure buildup and temperature change increase. A comparison was conducted between a fully coupled non-isothermal numerical model and a simplified model where fluid properties are held constant with temperature. This simplified model was found to provide an excellent approximation when using the injection fluid temperature for calculating fluid properties, even when the injection fluid was as much as ±15 • C of the initial reservoir temperature. The implications are that isothermal models can be expected to provide useful estimates of pressure buildup in this context. Despite the low viscosity of CO 2 at the low pressures studied, non-Darcy effects were found to be of negligible concern throughout the sensitivity analysis undertaken. This is because the CO 2 density is also low in this context. Based on these findings, simplified analytic solutions are derived, which accurately calculate both the pressure buildup and temperature decline during the injection period.

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“…Thermal effects including changes in in-situ reservoir temperature arising from heat transfer/exchanges between the injected CO 2 and the formation, contribute to the dynamics of underground activities (Hou et al, 2012, Norden et al, 2012, Singh et al, 2012. Changes in reservoir temperature are dependent on the geological structure and variations in rock thermal conductivity (Norden et al, 2012); some aspects of Joule-Thompson cooling (JTC) and viscous heat dissipation (VHD) are illustrated in Singh et al (2012), while in Hou et al (2012) the thermal process is incorporated with hydro-mechanical processes for the prediction of reservoir responses.…”

Section: Introductionmentioning

confidence: 99%

“…Changes in reservoir temperature are dependent on the geological structure and variations in rock thermal conductivity (Norden et al, 2012); some aspects of Joule-Thompson cooling (JTC) and viscous heat dissipation (VHD) are illustrated in Singh et al (2012), while in Hou et al (2012) the thermal process is incorporated with hydro-mechanical processes for the prediction of reservoir responses.…”

Section: Introductionmentioning

confidence: 99%

Carbon dioxide injection and associated hydraulic fracturing of reservoir formations

Eshiet

Sheng

2013

Environ Earth Sci

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The storage potential of subsurface geological systems makes them viable candidates for long term disposal of significant quantities of CO 2 . The geo-mechanical responses of these systems as a result of injection processes as well as the protracted storage of CO 2 are aspects that require sufficient understanding. A hypothetical model has been developed that conceptualises a typical well-reservoir system comprising an injection well where the fluid (CO 2 ) is introduced and a production/abandoned well sited at a distant location. This was accomplished by adopting a numerical methodology (Discrete Element Method), specifically designed to investigate the geo-mechanical phenomena whereby the various processes are monitored at the inter-particle scale. Fracturing events were simulated. In addition, the influence of certain operating variables such as injection flow rate and fluid pressure was studied with particular interest in the nature of occurring fractures and trend of propagation, the pattern and magnitude of pressure build-up at the well vicinity, pressure distribution between well regions and pore velocity distribution between well regions.Modelling results generally show an initiation of fracturing caused by tensile failure of the rock material at the region of fluid injection; however, fracturing caused by shear failure becomes more dominant at the later stage of injection. Furthermore, isolated fracturing events were observed to occur at the production/abandoned wells that were not propagated from the injection point. This highlights the potential of CO 2 introduced through an injection well, which could be used to enhance oil/gas recovery at a distant production well. The rate and magnitude of fracture development is directly influenced by the fluid injection rate. Likewise, the magnitude of pressure build-up is greatly affected by the fluid injection rate and the distance from the point of injection.The DEM modelling technique illustrated provides an effective procedure that allows for more specific investigations of geo-mechanical mechanisms occurring at sub-surface systems. The application of this 2 Corresponding Author:Address: School of Civil Engineering, University of Leeds, UK e-mail: y.sheng@leeds.ac.uk 2 methodology to the injection and storage of CO 2 facilitates the understanding of the fracturing phenomenon as well as the various factors governing the process.

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Numerical analysis of thermal effects during carbon dioxide injection with enhanced gas recovery: a theoretical case study for the Altmark gas field

Cited by 26 publications

References 40 publications

Reactive transport codes for subsurface environmental simulation

Reactive transport codes for subsurface environmental simulation

Heat transport and pressure buildup during carbon dioxide injection into depleted gas reservoirs

Carbon dioxide injection and associated hydraulic fracturing of reservoir formations

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