Modeling, parameterization and evaluation of monitoring methods for CO2 storage in deep saline formations: the CO2-MoPa project

Bauer, Sebastian; Class, Holger; Ebert, M.; Feeser, Volker; Götze, Hans‐Jürgen; Holzheid, Astrid; Kolditz, Olaf; Rosenbaum, Sabine; Rabbel, Wolfgang; Schäfer, Dirk; Dahmke, Andreas

doi:10.1007/s12665-012-1707-y

Cited by 45 publications

(14 citation statements)

References 68 publications

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“…geological carbon dioxide storage and utilization as well as unconventional gas resources Kolditz et al 2015). The preceding volume "Subsurface Energy Storage I" dealt with geoscientific contributions to the energy transition in Germany (Kabuth et al 2017;Bauer et al 2012). We hope that the present Thematic Issue on "Subsurface Energy Storage II" will achieve the goal of highlighting the results of collaborative geothermal energy research in China by Chinese and German scientists and will stimulate new ideas for future collaboration.…”

Section: Future Perspectives On Geothermal Development In Chinamentioning

confidence: 99%

Progress and perspectives of geothermal energy studies in China: from shallow to deep systems

et al. 2018

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Section: Future Perspectives On Geothermal Development In Chinamentioning

confidence: 99%

Progress and perspectives of geothermal energy studies in China: from shallow to deep systems

et al. 2018

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“…Deep saline aquifers, depleted gas and oil reservoirs, unmineable coal seams and deep oceans can all be the target storage reservoirs for CO 2 (Hitchon et al 1999;Griffith et al 2011;Bauer et al 2012;Ruan et al 2013). It is believed that deep saline aquifers have by far the greatest storage capacity (Dooley et al 2003;Bachu 2008;Gislason et al 2010;Aradóttir et al 2011;Siriwardane et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the influence of interaction between wellbore flow and lateral reservoir flow on CO2 geological sequestration

Liu

et al. 2015

Environ Earth Sci

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A wellbore and a combined reservoir system are essential for the management of subsurface fluid resources and the geological storage of CO 2 . But the interaction between wellbore and reservoir flow is often neglected in studies of the combined system. A 2D radial model, considering the interaction of wellbore and reservoir flow was developed to investigate its impact on CO 2 geological sequestration. The mass, energy and momentum equations for the wellbore and reservoir were solved using T2Well/ECO2N. The gas flow rate of the reservoir and wellbore are predicted, and the impact of interaction between wellbore and reservoir flow on the CO 2 plume distribution and evolution was investigated. Furthermore, the influence of the CO 2 injection rate, reservoir properties and salinity on the distribution of wellbore and reservoir flow was also explored. Interaction between the wellbore and reservoir flows determines the distribution of the reservoir gas flow rate which combined with layer thickness and porosity controls the horizontal distribution and evolution of the CO 2 plume. The CO 2 wellhead injection rate and reservoir properties (including lateral transmissivity, permeability) are vital factors influencing wellbore and reservoir flows. However, reservoir salinity has little effect on the interaction between the wellbore flow and the reservoir flow, but increased reservoir salinity can accelerate the horizontal migration of CO 2 . The results of this study may help to change the widely held opinion that the distribution of the injected CO 2 among the individual layers is simply proportional to their transmissivity, and thereby enhance our understanding of CO 2 evolution beneath the surface and provide theoretical support for safe and potential geological storage of CO 2 . List of symbols KThe index for components, k = 1 (H 2 O), 2 (salt), 3 (CO 2 ), and 4 (energy) M kThe accumulation terms of the components and energy k, kg m -3 q k Source/sink terms for mass or energy components, kg m -3 s -1 F k The mass or energy transport terms along the borehole due to an advective process, W m -1 X k b Mass fraction of component k in fluid phase b,The Darcy's velocity in phase b, m s -1 AThe well cross-sectional area, m 2 z Distance along-wellbore coordinate (can be vertical, inclined, or horizontal), m U bThe internal energy of phase b per unit mass, J kg -1The momentum of phase b per unit mass, J kg -1 k Thermal conductivity, W K -1 m -1 h bThe specific enthalpy of phase b, J kg -1 gGravitational acceleration constant, m s -2 hThe angle of inclination of the wellbore, dimensionlessThe wellbore heat loss/gain per unit length of wellbore, kg m -3 s -1 T Temperature, C, K TTime, s C 0The profile parameter (or distribution coefficient), dimensionless u d Drift velocity, m s -1 q mThe density of the gas-liquid mixture, kg m -3 u mThe mixture velocity (velocity of the mixture mass center), m s -1 q m * The profile-adjusted average density, kg m -3 u inThe flow in mass flow rate of wellbore block, kg s -1 u outThe flow out mass ...

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“…The rate of injection should be such that will not offset the stability of the system; however, the introduction of fluid will lead to an increase in the formation pressure, which without proper monitoring and control may result in mechanical failure of the material. As indicated in Bauer et al (2012) and Park et al (2012), tracking pressure development as the CO 2 is being injected and during post-mortem periods is essential in ensuring safety limits are not exceeded. An alternative measure of the evolution of fluid pressure can be achieved via changes in in-situ stress conditions.…”

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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Modeling, parameterization and evaluation of monitoring methods for CO2 storage in deep saline formations: the CO2-MoPa project

Cited by 45 publications

References 68 publications

Progress and perspectives of geothermal energy studies in China: from shallow to deep systems

Progress and perspectives of geothermal energy studies in China: from shallow to deep systems

Numerical investigation of the influence of interaction between wellbore flow and lateral reservoir flow on CO2 geological sequestration

Carbon dioxide injection and associated hydraulic fracturing of reservoir formations

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