A workflow for handling heterogeneous 3D models with the TOUGH2 family of codes: Applications to numerical modeling of CO2 geological storage

Audigane, Pascal; Chiaberge, Christophe; Mathurin, Frédéric; Lions, Julie; Picot-Colbeaux, Géraldine

doi:10.1016/j.cageo.2010.11.020

Cited by 19 publications

(8 citation statements)

References 29 publications

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“…In addition, a number of papers have been published during last years, including numerical modelling of CO 2 plume dissolution mechanisms in an aquifer (Audigane et al, 2011), CO 2 fluid flow studies and 2D/3D modelling, associated with the fault system in long and short terms (Audigane et al, 2007;Chang et al, 2008;Grimstad et al, 2009;Chadwick & Noy, 2010). The last seismic numerical modelling results represent performance of seismic techniques and methods in detection of presence, evolution, migration and leakage of CO 2 in the storage reservoir (Rossi et al, 2008;Picotti et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Potential structures for CO<sub>2</sub> geological storage in the Baltic Sea: Case study offshore Latvia

Shogenov¹,

Shogenova²,

Vizika-Kavvadias³

2013

Bull Geol Soc Finland

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This study is focused on two structures in the Baltic offshore region (E6 and E7 structures in Latvia) prospective for the geological storage of carbon dioxide (CO 2 ). Their CO 2 storage capacities were estimated recently with different levels of reliability. Petrophysical, geophysical, mineralogical and geochemical parameters of reservoir rocks represented by quartz sandstones of the Deimena Formation of Middle Cambrian in two wells and properties of Silurian and Ordovician cap rocks were additionally studied and interpreted in the present contribution. Extended methodology on rock measurements and estimation of conservative and optimistic storage capacity are presented. Uncertainties and risks of CO 2 storage in the offshore structure E6 estimated as the most prospective for CO 2 geological storage in the Baltic Region, and the largest among all onshore and offshore structures studied in Latvia, were discussed. We re-estimated the previous optimistic capacity of the E6 structure (265-630 Mt) to 251-602 Mt. Considering fault system within the E6 structure we estimated capacity of two compartments of the reservoir separately (E6-A and E6-B). Estimated by the optimistic approach CO 2 storage capacity of the E6-A part was 243-582 Mt (mean 365 Mt) and E6-B part 8-20 Mt (mean 12 Mt). Conservative capacity was 97-233 Mt (mean 146 Mt) in the E6-A, and 4-10 Mt (mean 6 Mt) in the E6-B. The conservative average capacity of the E6-B part was in the same range as this capacity in the E7 structure (6 and 7 Mt respectively). The total capacity of the two structures E6 and E7, estimated using the optimistic approach was on average 411 Mt, and using the conservative approach, 159 Mt.

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Section: Discussionmentioning

confidence: 99%

Potential structures for CO<sub>2</sub> geological storage in the Baltic Sea: Case study offshore Latvia

Shogenov¹,

Shogenova²,

Vizika-Kavvadias³

2013

Bull Geol Soc Finland

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“…In response to numerical modeling performance and CCS objectives (steering a middle course between mesh resolution and calculation time), various modules written in FORTRAN have been developed to facilitate the execution and the preand post-processing of TOUGH2 and TOUGHREACT models , Audigane et al 2010. These modules are programmed to use ASCII input and output files coming directly from TOUGH2 or TOUGHREACT.…”

Section: Modeling Approachmentioning

confidence: 99%

Modeling of CO2 Leakage up Through an Abandoned Well from Deep Saline Aquifer to Shallow Fresh Groundwaters

et al. 2011

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This article presents a numerical modeling application using the code TOUGHREACT of a leakage scenario occurring during a CO 2 geological storage performed in the Jurassic Dogger formation in the Paris Basin. This geological formation has been intensively used for geothermal purposes and is now under consideration as a site for the French national program of reducing greenhouse gas emissions and CO 2 geological storage. Albian sandstone, situated above the Dogger limestone is a major strategic potable water aquifer; the impacts of leaking CO 2 due to potential integrity failure have therefore to be investigated. The present case study illustrates both the capacity and the limitations of numerical tools to address such a critical issue.The physical and chemical processes simulated in this study have been restricted to:(i) supercritical CO 2 injection and storage within the Dogger reservoir aquifer, (ii) CO 2 upwards migration through the leakage zone represented as a 1D vertical porous medium to simulate the cement-rock formation interface in the abandoned well (iii) impacts on the Albian aquifer water quality in terms of chemical composition and the mineral phases representative of the porous rock by estimating fluid-rock interactions in both aquifers. 2Because of CPU time and memory constraints, approximation and simplification regarding the geometry of the geological structure, the mineralogical assemblages and the injection period (up to 5 years) have been applied to the system, resulting in limited analysis of the estimated impacts.The CO 2 migration rate and the quantity of CO 2 arriving as free gas and dissolving, firstly in the storage water and secondly in the water of the overlying aquifer, are calculated. CO 2 dissolution into the Dogger aquifer induces a pH drop from about 7.3 to 4.9 limited by calcite dissolution buffering. Glauconite present in the Albian aquifer also dissolves, causing an increase of the silicon and aluminium in solution and triggering the precipitation of kaolinite and quartz around the intrusion point. A sensitivity analysis of the leakage rate according to the location of the leaky well and the variability of the petro-physical properties of the reservoir, the leaky well zone and the Albian aquifers is also provided.

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“…The grid mesh is composed of a central 1 km 2 area of 25m25m grid bocks. Additional refinements using local grid refinement technique (Audigane et al, 2011) are carried out around the wells and around the leak down to a minimum area of 1.6 m1.6m. Outside of the central area, the grid cells dimensions follow an exponential progression so that grid cell radius are doubled every three elements up to a distance of 78 km and no grid block has more than two connections per face.…”

Section: Model Set-up and Parametersmentioning

confidence: 99%

Hydraulic barrier design and applicability for managing the risk of CO2 leakage from deep saline aquifers

Réveillère

Rohmer

Manceau

2012

International Journal of Greenhouse Gas Control

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A proper risk management scheme for CO 2 storage should include an adequate monitoring plan completed with a site-specific intervention plan in order to demonstrate that any undesired consequence can be prevented, if not corrected. In the case of CO 2 escape from the storage reservoir to an overlying aquifer through a vertical conduit (representing the degraded cement of a well or a permeable fault), directly modifying the leak hydraulic properties (e.g. permeability) may be unfeasible. An appealing option is to counter the driving forces of the migration (natural CO 2 buoyancy and injection-induced over-pressure) by increasing the pressure over the leak through brine or water injection within the overlying aquifer, i.e. by creating a -hydraulic barrier‖. The present article presents and discusses the operational and strategic issues associated with this corrective technique and proposes a methodology in order to set the main design parameters (injection flow rate and duration) depending on the site specificities. The methodology is tested on a leakage scenario and three implementation cases of hydraulic barriers (brine injection 10 m away from the leak with or without delay, or 1 km away without delay) are simulated using the 3D multiphase flow transport code TOUGH2/ECO2N. We assess their effectiveness for stopping the leakage and for trapping (residual and dissolution) the CO 2 accumulated in the overlying aquifer. This example shows that the hydraulic barrier can be suited to low transmissivity overlying aquifers, and that its effectiveness will primarily depend on the distance from the leak to the brine injection well. When possible, a brine injection within the overlying aquifer formation in the vicinity of the leak ensures a rapid stop of the leakage and an effective trapping of the CO 2 .

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A workflow for handling heterogeneous 3D models with the TOUGH2 family of codes: Applications to numerical modeling of CO2 geological storage

Cited by 19 publications

References 29 publications

Potential structures for CO<sub>2</sub> geological storage in the Baltic Sea: Case study offshore Latvia

Potential structures for CO<sub>2</sub> geological storage in the Baltic Sea: Case study offshore Latvia

Modeling of CO2 Leakage up Through an Abandoned Well from Deep Saline Aquifer to Shallow Fresh Groundwaters

Hydraulic barrier design and applicability for managing the risk of CO2 leakage from deep saline aquifers

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