A fresh approach to investigating CO 2 storage: Experimental CO 2 –water–rock interactions in a low-salinity reservoir system

Farquhar, Susan McDonald; Pearce, Jon; Dawson, G. K. W.; Golab, Alexandra; Sommacal, Silvano; Kirste, Dirk; Biddle, Dean; Golding, Suzanne D.

doi:10.1016/j.chemgeo.2014.10.006

Cited by 119 publications

(93 citation statements)

References 48 publications

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“…These approaches include qualitative processes mostly depending on visual inspection or compositional analysis using SEM/EDS (Scanning Electron Microscope/Energy Dispersive X-ray Spectrometer; VEGA II LSU, Tescan, Brno, Czech Republic), XRD (X-ray Diffractometer; X Pert-MPD, Philips, Eindhoven, The Netherlands), and XRF (X-ray Fluorescence Spectrometer; XRF-1800, Shimadzu, Kyoto, Japan) [45,46]. However, quantitative information acquired from this study was very limited, such as in mineral composition transfer and structural change [47,48]. To supplement these limitations, the surface roughness change of the rock surface during the scCO 2 -sandstone-groundwater reaction was investigated, and the feasibility of its use as a parameter to evaluate the geochemical weathering process was verified by comparing the physical property change of the sandstone with the cation concentration change in groundwater during the geochemical reaction.…”

Section: Figurementioning

confidence: 99%

The Use of the Surface Roughness Value to Quantify the Extent of Supercritical CO2 Involved Geochemical Reaction at a CO2 Sequestration Site

et al. 2017

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Changes in the physical properties of the supercritical CO 2 (scCO 2 ) reservoir rock is one of the most important factors in controlling the storage safety at a scCO 2 sequestration site. According to recent studies, it is probable that geochemical reactions influence changes in the rock properties after a CO 2 injection in the subsurface, but quantitative data that reveal the interrelationship of the factors involved and the parameters needed to evaluate the extent of scCO 2 -rock-groundwater reactions have not yet been presented. In this study, the potential for employing the surface roughness value (SR RMS ) to quantify the extent of the scCO 2 involved reaction was evaluated by lab-scale experiments. For a total of 150 days of a simulation of the scCO 2 -sandstone-groundwater reaction at 100 bar and 50 • C, the trends in changes in the physical rock properties, pH change, and cation concentration change followed similar logarithmic patterns that were significantly correlated with the logarithmic increase in the SR RMS value. These findings suggest that changes in surface roughness can quantify the extent of the geochemical weathering process and can be used to evaluate leakage safety due to the progressive changes in rock properties at scCO 2 storage sites.

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Section: Figurementioning

confidence: 99%

The Use of the Surface Roughness Value to Quantify the Extent of Supercritical CO2 Involved Geochemical Reaction at a CO2 Sequestration Site

et al. 2017

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“…Several researchers have reported that sulfate minerals such as gypsum, anhydrite, and alunite are formed by SO 2 -CO 2 -water-rock interaction when Ca-rich minerals such as calcite and anorthite are present [4,12,16,37]. They also reported that the precipitation of sulfate minerals may be a factor in reducing porosity near injection wells.…”

Section: Comparison To Other Studiesmentioning

confidence: 99%

“…In contrast, chlorite (4.8 wt.% of total minerals) caused the release of a large amount of Fe and Mg. Chlorite plays an important role in the increase in Fe and Mg concentrations in other studies under CO 2 -rich conditions [6,15,37,38].…”

Section: Change In Mineralogymentioning

confidence: 99%

Impact of SO₂ on Alteration of Reservoir Rock with Ca-Deficient Conditions and Poor Buffering Capacity under a CO₂ Geologic Storage Condition

et al. 2018

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The objective of this study is to evaluate the impact of SO 2 -CO 2 -water-rock interaction on the alteration of a reservoir rock having Ca-deficient conditions and little buffering capacity and its implication for porosity change near the injection well from a CO 2 storage pilot site, Republic of Korea. For our study, three cases of experimental and geochemical modeling were carried out (pure CO 2 , 0.1% SO 2 in CO 2 , and 1% SO 2 in CO 2 , resp.) under realistic geologic storage conditions. Our results show that SO 2 accelerated waterrock interactions by lowering the pH. In the 1% SO 2 case, pH remained less than 2 during the experiments because of insufficient buffering capacity. Sulfate minerals were not precipitated because of an insufficient supply of Ca. Because the total volume of precipitated secondary minerals was less than that of the dissolved primary minerals, the porosity of rock increased in all cases. Chlorite largely contributed to the decrease in total rock volume although it formed only 4.8 wt.% of the rock. Our study shows that the coinjection of a certain amount of SO 2 at CO 2 storage reservoirs without carbonate and Ca-rich minerals can significantly increase the porosity by enhancing water-rock interactions. This procedure can be beneficial to CO 2 injection under some conditions.

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“…Furthermore, the representative transport calculations (e.g., directional permeability) for further reliable upscaling study tend to be influenced. In this paper, a permeability study of heterogeneous sandstone from the Chinchilla 4 borehole in the Surat Basin, Queensland (Farquhar et al 2014) has been conducted. The micro-CT scans have a voxel size of 6.6 µm with 1.86 billion grid elements generated as an initial structural input.…”

Section: Introductionmentioning

confidence: 99%

Parallel Lattice Boltzmann Computing and Applications in Core Sample Feature Evaluation

et al. 2014

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Micro-CT scans with QEMSCAN mapping provide visualization of core samples to quantify heterogeneous physical properties important for subsurface flow including, as examples, pore size distribution and connectivity, mineral compositions, porosity and permeability, amongst many others. 3D high-resolution micro-CT scans can deliver a very high level of microstructures detail, which also implies enormous numerical data sets and associated computational processing load. It is, therefore, important to understand (1) the voxel resolution of micro-CT scans required to retain physical structure fidelity (e.g., mineral compositions, pore size and throats, and porosity and tortuosity), (2) the sensitivity of individual mineral property and voxel resolution on the directional permeability, and (3) the smallest sample size that provides reliable and representative transport calculations (e.g., directional permeability and connectivity). The lattice Boltzmann method is capable of simulating flow in both open pore spaces and porous media and is used here to allow for flow in multiple matrices (quartz aggregate and low-permeable clay matrix). As an application example, a permeability study of the Precipice Sandstone from the Chinchilla 4 well in the Surat Basin has been conducted. Regarding the Chinchilla sample, we established that (1) the composition ratio is relatively sensitive to voxel resolution: higher resolution imaging is required to retain narrow pore throats and excessively coarsened voxel resolutions result in severe loss of internal microstructures information; (2) both voxel resolutions and individual mineral properties affect flow dynamics, and the clay permeability slightly affects the whole permeability at ∼nD scale; (3) it is not feasible to define the accurate ratio of lattice nodes versus pore apertures for meeting the grid independence due to the complex sample tortuosity;

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A fresh approach to investigating CO 2 storage: Experimental CO 2 –water–rock interactions in a low-salinity reservoir system

Cited by 119 publications

References 48 publications

The Use of the Surface Roughness Value to Quantify the Extent of Supercritical CO2 Involved Geochemical Reaction at a CO2 Sequestration Site

The Use of the Surface Roughness Value to Quantify the Extent of Supercritical CO2 Involved Geochemical Reaction at a CO2 Sequestration Site

Impact of SO₂ on Alteration of Reservoir Rock with Ca-Deficient Conditions and Poor Buffering Capacity under a CO₂ Geologic Storage Condition

Parallel Lattice Boltzmann Computing and Applications in Core Sample Feature Evaluation

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A fresh approach to investigating CO 2 storage: Experimental CO 2 –water–rock interactions in a low-salinity reservoir system

Cited by 119 publications

References 48 publications

The Use of the Surface Roughness Value to Quantify the Extent of Supercritical CO2 Involved Geochemical Reaction at a CO2 Sequestration Site

The Use of the Surface Roughness Value to Quantify the Extent of Supercritical CO2 Involved Geochemical Reaction at a CO2 Sequestration Site

Impact of SO2 on Alteration of Reservoir Rock with Ca-Deficient Conditions and Poor Buffering Capacity under a CO2 Geologic Storage Condition

Parallel Lattice Boltzmann Computing and Applications in Core Sample Feature Evaluation

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Impact of SO₂ on Alteration of Reservoir Rock with Ca-Deficient Conditions and Poor Buffering Capacity under a CO₂ Geologic Storage Condition