Natural analogues: a potential approach for developing reliable monitoring methods to understand subsurface CO2 migration processes

Schütze, Claudia; Sauer, U.; Beyer, Klaus-Dieter; Lamert, H.; Bräuer, Karin; Strauch, Gerhard; Flechsig, C.; Kämpf, Horst; Dietrich, Peter

doi:10.1007/s12665-012-1701-4

Cited by 56 publications

(29 citation statements)

References 71 publications

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“…Only a detailed knowledge about the hydraulic properties may help to quantify their actual leakage potential and thus potentially minimize the probability of CO2 leakage in the modelled scenarios. Such knowledge, as well as better reservoir characterization, can also be integrated in monitoring strategies to mitigate the risk of CO2 leakage (Edlmann et al 2013;Schutze et al 2012). Figures Fig.…”

Section: Discussionmentioning

confidence: 99%

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Simulating seismic chimney structures as potential vertical migration pathways for CO2 in the Snøhvit area, SW Barents Sea: model challenges and outcomes

et al. 2016

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Carbon Capture and Storage (CCS) activities at the Snøhvit field, Barents Sea, will involve carrying out an analysis to determine which parameters affect the migration process of CO2 from the gas reservoir, to what degree they do so and how sensitive these parameters are to any changes. This analysis will aim to evaluate the effects of applying a broad but realistic range of reservoir, fault and gas chimney properties on potential CO2 leakage at various depths throughout the subsurface. Fluid flow might take place through parts of or the entire extent of the overburden. One of the aims of the analysis is assessing the potential of CO2 reaching the seabed. Using the Snøhvit gas reservoir and overburden in the Barents Sea, a series of geological models were built using seismic and well-log data. We then performed numerical simulations of CO2 migration in focused fluid flow structures. Identification of potential migration pathways and their extent, such as gas chimneys and faults, and their incorporation into these models and simulations will provide a realistic insight into the migration potential of CO2. In the simulations the CO2 is injected over a 20 year period at a rate of 0.7 Mt/year and migration is allowed to take place over a 2000 year time frame for domains of approximately 21 Km 2 for the caprock fault models, 24 Km 2 for the realistic gas chimney models and 35 Km 2 for the generic gas chimney models, in a layered sedimentary succession. The total mass of CO2 injected in the reservoir during the 20-year injection period is 14 Mt. There is a strong interaction between the various parameters but the parameter that had the most influence on the CO2 migration process was probably the permeability of the reservoirs, especially the average permeability (k). Also, for the faulted caprock scenarios, it should be noted that at near surface depths the permeability of 765 mD is already adequate for a good CO2 flow. At the chimney top level (600 m) however, a further increase in permeability has an additional effect on improving CO2 flow. Overall, considering the slow upward migration velocity of the plume, this geological setup can be regarded as a suitable storage site.

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Section: Discussionmentioning

confidence: 99%

“…Around 700,000 tonnes of carbon dioxide per year will be stored in this way. A monitoring program has also been set-up to investigate the behaviour of CO2 underground (Schutze et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Simulating seismic chimney structures as potential vertical migration pathways for CO2 in the Snøhvit area, SW Barents Sea: model challenges and outcomes

et al. 2016

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“…It has been a center of research for various mantle gas and fluid-related studies within the last 2 decades. After the first geophysical studies in the area (Flechsig et al 2008(Flechsig et al , 2010Schütze et al 2012aSchütze et al , 2013 and the gas emission can vary up to one to two orders of magnitude. However, some anomalous areas were detected in the subsurface by electric resistivity tomographies (ERT) and underneath strong CO 2 degassing spots in that study.…”

Section: Introductionmentioning

confidence: 99%

Architecture and temporal variations of a terrestrial CO2 degassing site using electric resistivity tomography and self-potential

Nickschick

Flechsig

Meinel

et al. 2017

Int J Earth Sci (Geol Rundsch)

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“…While the risks associated to underground CO 2 and methane storage are somehow different, the challenge associated to maintaining a sealed reservoir and the monitoring needs for unwanted surface gas emanations are similar (Lewicki et al 2007;Schutze et al 2012). The pressure in the reservoir is the driving process for upward gas migration toward the ground surface.…”

Section: Introductionmentioning

confidence: 99%

A risk-based method for the design of monitoring networks for surface gas emanations from abandoned underground coal mines

Frippiat

Veschkens

Massenhove³

et al. 2014

Environ Earth Sci

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In this paper, a risk-based method implemented within a geographic information system is proposed to locate monitoring points near zones of lower hydraulic resistance for the detection of gas leaks from underground gas storage sites installed in former underground coal mines. Risk assessment is conducted considering (1) the location and extent of the mined areas and of the former underground mining infrastructures, (2) damage induced by the mining works on the upper geological formations and their associated increase in hydraulic conductivity, and (3) potential impacts on humans, based on a proxy for population density. A new physically based method is proposed to compute the damage induced by the mining activities on upper geological layers, based on a 3D reconstruction of the geometry of the voids of the upper part of the former mine and a computation of the associated ground movements using influence functions. A new type of influence function applicable to inclined coal seam is proposed. The whole methodology is applied to the former underground gas storage site of Péronnes-lez-Binche, in Belgium. Three locations are identified for the installation of new piezometers to complement the existing monitoring network.

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Natural analogues: a potential approach for developing reliable monitoring methods to understand subsurface CO2 migration processes

Cited by 56 publications

References 71 publications

Simulating seismic chimney structures as potential vertical migration pathways for CO2 in the Snøhvit area, SW Barents Sea: model challenges and outcomes

Simulating seismic chimney structures as potential vertical migration pathways for CO2 in the Snøhvit area, SW Barents Sea: model challenges and outcomes

Architecture and temporal variations of a terrestrial CO2 degassing site using electric resistivity tomography and self-potential

A risk-based method for the design of monitoring networks for surface gas emanations from abandoned underground coal mines

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