Mechano-chemical interactions in sedimentary rocks in the context of CO 2 storage: Weak acid, weak effects?

Rohmer, Jérémy; Pluymakers, Anne; Renard, François

doi:10.1016/j.earscirev.2016.03.009

Cited by 144 publications

(72 citation statements)

References 174 publications

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“…This process can result in shrinkage, altering the intergranular pore space and possibly the transport flow paths and mechanical properties . CO 2 as carbonic acid in water can also promote the dissolution of minerals and, in some cases, secondary mineral precipitation; this results in changes to the pore space, which affects transport flow paths and, in some cases, mechanical properties . In this section, we discuss CO 2 adsorption in swelling clays and then geochemical reaction theory, which is relevant to mineral dissolution and precipitation.…”

Section: Geochemical Reactionsmentioning

confidence: 99%

“…26,27 CO 2 as carbonic acid in water can also promote the dissolution of minerals 28 and, in some cases, secondary mineral precipitation; this results in changes to the pore space, which affects transport flow paths 29 and, in some cases, mechanical properties. 30,31 In this section, we discuss CO 2 adsorption in swelling clays and then geochemical reaction theory, which is relevant to mineral dissolution and precipitation. Kinetic rate constants, thermodynamic relationships, and reactive surface area, which are relevant to geochemical reaction theory, are also discussed, along with the location and function of reactive minerals in storage reservoirs and implications for reservoir mechanical properties.…”

Section: Geochemical Reactionsmentioning

confidence: 99%

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A review of geochemical–mechanical impacts in geological carbon storage reservoirs

et al. 2019

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Geological carbon storage (GCS) refers to the technology of capturing man‐made carbon dioxide (CO2) emissions, typically from stationary power sources, and storing such emissions in deep underground reservoirs. GCS is an approach being explored globally as a defense mechanism against climate change projections, although it is not without its critics. An important focus has been recently placed on understanding the coupling between rock–fluid geochemical alterations and mechanical changes for CO2 storage schemes in saline aquifers. This article presents a review of the current state of knowledge regarding CO2‐induced geochemical reactions in subsurface reservoirs, and their potential impact on mechanical properties and microseismic events at CO2 storage sites. This review focuses, in particular, on the current state of the art in fluid–rock interactions within the GCS context. Key issues to be addressed include geochemical reactions and the alteration of transport and mechanical properties. Specific review topics include the swelling of clays, the prediction of dissolution and precipitation reaction rates, CO2‐induced changes in porosity and permeability, constitutive models of chemo–mechanical interactions in rock, and correlations between geochemical reactions and induced seismicity. The open questions in the field are emphasized, and new research needs are highlighted. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Section: Geochemical Reactionsmentioning

confidence: 99%

Section: Geochemical Reactionsmentioning

confidence: 99%

A review of geochemical–mechanical impacts in geological carbon storage reservoirs

et al. 2019

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“…Alteration of rocks with CO 2 ‐brine in the laboratory also results in measurable changes in geomechanical and transport properties, such as increased permeability and porosity, dissolution of siliceous and carbonate minerals, reduction of indentation stiffness, reduction of fracture toughness, and decrease of the size of yield stress locus . Changes are more impactful in rocks with load‐bearing dissolvable minerals or clay cements sensitive to pore‐fluid chemistry …”

Section: Introductionmentioning

confidence: 99%

“…The potential effect of the reacted ‘skin’ on the bulk strength of the core would be limited, rendering traditional rock mechanics tests, such as unconfined compressive strength testing, triaxial testing and elastic wave velocity measurement, ineffective. Micromechanics tests such as the indentation test and the scratch test offer a practical alternative by preferentially probing the reacted region …”

Section: Introductionmentioning

confidence: 99%

CO₂‐induced chemo‐mechanical alteration in reservoir rocks assessed via batch reaction experiments and scratch testing

et al. 2017

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The injection of carbon dioxide (CO2) into geological formations results in a chemical re‐equilibration between the mineral assemblage and the pore fluid, with ensuing mineral dissolution and re‐precipitation. Hence, target rock formations may exhibit changes of mechanical and petrophysical properties due to CO2 exposure. We conducted batch reaction experiments with Entrada Sandstone and Summerville Siltstone exposed to de‐ionized water and synthetic brine under reservoir pressure (9–10 MPa) and temperature (80°C) for up to four weeks. Samples originate from the Crystal Geyser field site, where a naturally occurring CO2 seepage alters portions of these geologic formations. We conducted micro‐scratch tests on rock samples without alteration, altered under laboratory conditions, and naturally altered over geologic time. Scratch toughness and hardness decrease as a function of exposure time and water salinity up to 52% in the case of Entrada and 87% in the case of Summerville after CO2‐induced alteration in the laboratory. Imaging of altered cores with SEM‐EDS and X‐ray microCT methods show dissolution of carbonate and silica cements and matrix accompanied by minor dissolution of Fe‐oxides, clays, and other silicates. Parallel experiments using powdered samples confirm that dissolution of carbonate and silica are the primary reactions. The batch reaction experiments in the autoclave utilize a high fluid to rock volume ratio and represent an end member of possible alteration associated with CO2 storage systems. These types of tests serve as a pre‐screening tool to identify the susceptibility of rock facies to CO2‐related chemical‐mechanical alteration during long‐term CO2 storage. © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd.

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“…Simulation tools that couple thermal, hydraulic, chemical, and mechanical (THMC) processes in geologic media have been developed to study engineering problems in geologic settings (Kim et al, ; MacQuarrie & Mayer, ; Podgorney et al, ; Rohmer et al, ; Rohmer & Seyedi, ; Rutqvist, ; Rutqvist et al, ; Rutqvist & Tsang, , ). To date, THMC simulators for site‐scale problems invoke the multiple interacting continua fractured rock approximation (Pruess, ), which was developed for simulating fluid flow and heat transfer within and between rock matrix and interconnected fracture networks.…”

Section: Questions For Future Researchmentioning

confidence: 99%

The Role of Chemistry in Fracture Pattern Development and Opportunities to Advance Interpretations of Geological Materials

Laubach

Lander²,

Criscenti

et al. 2019

Reviews of Geophysics

228

106

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Fracture pattern development has been a challenging area of research in the Earth sciences for more than 100 years. Much has been learned about the spatial and temporal complexity inherent to these systems, but severe challenges remain. Future advances will require new approaches. Chemical processes play a larger role in opening‐mode fracture pattern development than has hitherto been appreciated. This review examines relationships between mechanical and geochemical processes that influence the fracture patterns recorded in natural settings. For fractures formed in diagenetic settings (~50 to 200 °C), we review evidence of chemical reactions in fractures and show how a chemical perspective helps solve problems in fracture analysis. We also outline impediments to subsurface pattern measurement and interpretation, assess implications of discoveries in fracture history reconstruction for process‐based models, review models of fracture cementation and chemically assisted fracture growth, and discuss promising paths for future work. To accurately predict the mechanical and fluid flow properties of fracture systems, a processes‐based approach is needed. Progress is possible using observational, experimental, and modeling approaches that view fracture patterns and properties as the result of coupled mechanical and chemical processes. A critical area is reconstructing patterns through time. Such data sets are essential for developing and testing predictive models. Other topics that need work include models of crystal growth and dissolution rates under geological conditions, cement mechanical effects, and subcritical crack propagation. Advances in machine learning and 3‐D imaging present opportunities for a mechanistic understanding of fracture formation and development, enabling prediction of spatial and temporal complexity over geologic timescales. Geophysical research with a chemical perspective is needed to correctly identify and interpret fractures from geophysical measurements during site characterization and monitoring of subsurface engineering activities.

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Mechano-chemical interactions in sedimentary rocks in the context of CO 2 storage: Weak acid, weak effects?

Cited by 144 publications

References 174 publications

A review of geochemical–mechanical impacts in geological carbon storage reservoirs

A review of geochemical–mechanical impacts in geological carbon storage reservoirs

CO₂‐induced chemo‐mechanical alteration in reservoir rocks assessed via batch reaction experiments and scratch testing

The Role of Chemistry in Fracture Pattern Development and Opportunities to Advance Interpretations of Geological Materials

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Mechano-chemical interactions in sedimentary rocks in the context of CO 2 storage: Weak acid, weak effects?

Cited by 144 publications

References 174 publications

A review of geochemical–mechanical impacts in geological carbon storage reservoirs

A review of geochemical–mechanical impacts in geological carbon storage reservoirs

CO2‐induced chemo‐mechanical alteration in reservoir rocks assessed via batch reaction experiments and scratch testing

The Role of Chemistry in Fracture Pattern Development and Opportunities to Advance Interpretations of Geological Materials

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CO₂‐induced chemo‐mechanical alteration in reservoir rocks assessed via batch reaction experiments and scratch testing