Effect of supercritical CO2 on the Corvio sandstone in a flow-thru triaxial experiment

Canal, J.; Delgado‐Martín, Jordi; Barrientos, Victor; Juncosa, Ricardo; Rodríguez-Cedrún, Borja; Falcón-Suarez, Ismael

doi:10.1201/b16955-236

Cited by 4 publications

(3 citation statements)

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“…limestone, see [14] and [15]), or is carbonatecemented (e.g. calcite cemented sandstone, see [16]). Further understanding of chemo-hydro-mechanical couplings in geomaterials is also desirable in the field of unconventional hydrocarbon engineering, as artificial weathering in the form of 'acid stimulation' is often performed to increase permeability of the host rock, typically in carbonate rock or sandstone [17].…”

Section: Introductionmentioning

confidence: 99%

“…Despite the complete dissolution of carbonates, no visible change to rock strength was observed. Also Canal et al [16] performed flow-through triaxial experiments to investigate the effect of CO2 injection on the Corvio sandstone, however in this case the material was reportedly selected in order to minimize chemical couplings. In fact, the Corvio sandstone is a quartzarenite with silica cement, and is consistently shown to undergo minor hydro-mechanical effects due to reactive processes.…”

Section: Introductionmentioning

confidence: 99%

“…Specific cross section area of cementing bonds versus porosity during dissolution/deposition (the dots mark the initial porosity). a) microscopic calculation, b) macroscopic calculation with model equation( 16). Specific reactive surface area versus porosity during dissolution/deposition (the dots mark the initial porosity).…”

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confidence: 99%

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Chemo-mechanical modeling of artificially and naturally bonded soils

Gajo

Cecinato

Hueckel

2019

Geomechanics for Energy and the Environment

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Chemo-mechanical effects are known to be significant in a number of applications in modern geomechanics, ranging from slope stability assessment to soil improvement and CO2 sequestration. This work focuses on coupled chemo-mechanical modeling of bonded geomaterials undergoing either mechanical strengthening, due to increased cementation, or weakening, due to cement dissolution. A constitutive model is developed that accounts for the multi-scale nature of the chemo-mechanical problem, introducing some cross-scale functions establishing a relationship between the evolution of microscopic variables and the macroscopic material behavior, realistically following the evolution of the reactive surface area, cross-sectional area and the number of bonds along with dissolution/deposition. The model presented here builds up on a previously introduced framework. However, at variance with existing works, it is specialized on materials with only reactive bonds, such as carbonate cemented sandstone or microbially cemented silica sand. Model validation is provided upon reproducing different types of chemomechanical experimental datasets, on different naturally and artificially cemented materials, to establish the reliability of the proposed framework.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chemo-mechanical modeling of artificially and naturally bonded soils

Gajo

Cecinato

Hueckel

2019

Geomechanics for Energy and the Environment

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Hydraulic Behavior of Fractured Calcite-Rich Sandstone After Exposure to Reactive CO2–H2O Flow

Dimadis,

Bakasis

2024

Geotech Geol Eng

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Geological carbon sequestration in jointed reservoirs will require the use of fracture network for the flow of CO2 plumes. However, acidic solution formed at the interface between brine and CO2 can cause chemical erosion of the local rock mass, especially in rocks with high carbonate content. The use of the water alternating gas technique for injection stimulation can exacerbate this issue, as the water–CO2 interface occurs in areas near the injection point. As a result, acidic flow can impact the surrounding rock mass, particularly around the main flow paths where fracture network conductivity is much higher than matrix permeability. To investigate the impact of acidic flow on fracture conductivity, we conducted an experiment on a fractured sandstone sample that was exposed to CO2-saturated water. Our findings revealed a nearly ten-fold increase in post-experimental water-relative permeability, and restriction of flow within established flow channels, which consist one third of the fracture surface. In conclusion, our study sheds light on the dynamic behavior of fractured sandstone under the influence of CO2–H2O flow, revealing significant changes in transmissivity and fracture geometry. These findings contribute to a better understanding of the hydraulic performance of fractures in the context of geological carbon sequestration.

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