Impacts of mineralogical compositions on different trapping mechanisms during long-term CO2 storage in deep saline aquifers

Wang, Kairan; Xu, Tianfu; Tian, Hailong; Wang, Fugang

doi:10.1007/s11440-015-0427-3

Cited by 25 publications

(15 citation statements)

References 89 publications

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“…The decreases in the porosity and permeability of the three formations after 100 years agrees with the simulation results of Xu et al [16] and Wang et al [41]. We find that the CO 2 mineral trapping is affected by rock types of injected formations, especially the content of quartz.…”

Section: Comparisons With Previous Studiessupporting

confidence: 90%

“…We also compare our results with previous modelling studies [14,16,40,41]. The decreases in the porosity and permeability of the three formations after 100 years agrees with the simulation results of Xu et al [16] and Wang et al [41].…”

Section: Comparisons With Previous Studiessupporting

confidence: 89%

“…The differences can be explained by the fact that K + is only from illite and K-feldspar in Liujiagou and Shiqianfeng formations, while the dissolution of glauconite could provide K + for both illite and K-feldspar [16]. Chlorite as primary mineral provides Fe 2+ and Mg 2+ for precipitation of ankerite and siderite, which is consistent with Yang et al [40] and Wang et al [41]. The CO 2 trapping minerals are as follows: calcite, dawsonite, and siderite in the Liujiagou formation; calcite and dawsonite in the Shiqianfeng formation; calcite, dawsonite, and magnesite in the Shihezi formation.…”

Section: Comparisons With Previous Studiessupporting

confidence: 85%

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Simulation and Analysis of Long-Term CO₂ Trapping for the Shenhua CCS Demonstration Project in the Ordos Basin

Yang

et al. 2017

Geofluids

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The Shenhua CO 2 capture and sequestration (CCS) project has achieved its goal of injecting 100,000 tons/year CO 2 into the saline aquifers of the Ordos Basin. This study analyzes the geochemical interactions between CO 2 , formation fluid, and host rock of the major formations in the Ordos Basin, assesses the CO 2 trapping capabilities, and predicts the final mineral forms of injected CO 2 . Reactive transport simulations are performed using a 2D radial model, which represents a homogeneous formation. The results show that 80% of injected CO 2 remains as free supercritical gas in each formation after injection, while most of CO 2 is sequestrated in different carbonate mineral assemblages after 10,000 years. The CO 2 mineral trapping capacities of the Shiqianfeng and Shihezi formations are smaller than the Liujiagou formation. Calcite, dawsonite, and siderite are stable CO 2 trapping minerals, while dolomite, ankerite, and magnesite are not. The increase in porosity and permeability of the three formations in the first 100 years agrees with the observation from the Shenhua CCS Project. Also the decrease in porosity and permeability after 100 years shows agreement with other modelling studies using the similar methods. These results are useful for the evaluation of the geochemical process in long-term CO 2 geological storage.

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Section: Comparisons With Previous Studiessupporting

confidence: 90%

Section: Comparisons With Previous Studiessupporting

confidence: 89%

Section: Comparisons With Previous Studiessupporting

confidence: 85%

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Simulation and Analysis of Long-Term CO₂ Trapping for the Shenhua CCS Demonstration Project in the Ordos Basin

Yang

et al. 2017

Geofluids

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“…Among them, geological sequestration is an immediately available and technologically feasible option. Carbon dioxide can be sequestered in various geological formations, including deep saline aquifers, depleted oil and gas reservoirs, unmineable coal seams, and abandoned salt caverns …”

Section: Introductionmentioning

confidence: 99%

Experimental study of physical‐chemical properties modification of coal after CO₂ sequestration in deep unmineable coal seams

Zhao

Wang

et al. 2018

Greenhouse Gases

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An initial investigation into the impacts of CO2 storage in unmineable coal seams, with or without enhanced coal‐bed methane recovery (CO2‐ECBM), was conducted, focusing on changes in the chemical and physical properties of coal. A high metamorphic grade anthracite was obtained from Qinshui Basin in China. Powdered coal was reacted with deionized water and carbon dioxide at temperatures of 25–35 °C and pressures of 5–11 MPa, in seven custom‐built batch reactors – conditions similar to the in situ formation conditions for the coal samples. An experiment with N2 saturated‐water to compare CO2‐free‐water mobilization with CO2‐water was also performed. It was observed that the supercritical CO2‐H2O‐coal reaction had a more significant influence on the micropores than mesopores. The micropore increase was reflected directly in the specific surface area and pore volume, which increased sharply. The true density also increased accordingly. The changes to the pore structure in the coal may affect the storage capacity of CO2 and can modify the fluid flow pattern in the process of CO2‐ECBM. Meanwhile, after exposing the coal samples to supercritical CO2, most of the trace‐element content in the reaction solutions was very low; only the Se and Mn content was beyond acceptable drinking water quality, but not enough to produce a serious influence on shallow aquifers. Nonetheless, the potential for mobilizing toxic trace elements from the coalbed is an important factor to be considered when evaluating CO2 sequestration in deep unmineable coal seams. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd.

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“…The Ordos CCS demonstration project, the first CCS project in China, is located in the northeastern portion of the basin. The strata involved range in age from the Paleozoic to the Cenozoic, and their total thickness exceeds 5000 m. According to the engineering design, the Mesozoic (Triassic) Liujiagou formation and the underlying Paleozoic (Permian) strata are the target CO 2 storage formations, and these units consist mainly of interbedded sandstone and mudstone [18].…”

Section: Methodsmentioning

confidence: 99%

Experimental Study on the Effects of Stress Variations on the Permeability of Feldspar-Quartz Sandstone

Wang

Sun

et al. 2017

Geofluids

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The multistage and discontinuous nature of the injection process used in the geological storage of CO 2 causes reservoirs to experience repeated loading and unloading. The reservoir permeability changes caused by this phenomenon directly impact the CO 2 injection process and the process of CO 2 migration in the reservoirs. Through laboratory experiments, variations in the permeability of sandstone in the Liujiagou formation of the Ordos CO 2 capture and storage (CCS) demonstration project were analyzed using cyclic variations in injection pressure and confining pressure and multistage loading and unloading. The variation in the micropore structure and its influence on the permeability were analyzed based on micropore structure tests. In addition, the effects of multiple stress changes on the permeability of the same type of rock with different clay minerals content were also analyzed. More attention should be devoted to the influence of pressure variations on permeability in evaluations of storage potential and studies of CO 2 migration in reservoirs in CCS engineering.

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Impacts of mineralogical compositions on different trapping mechanisms during long-term CO2 storage in deep saline aquifers

Cited by 25 publications

References 89 publications

Simulation and Analysis of Long-Term CO₂ Trapping for the Shenhua CCS Demonstration Project in the Ordos Basin

Simulation and Analysis of Long-Term CO₂ Trapping for the Shenhua CCS Demonstration Project in the Ordos Basin

Experimental study of physical‐chemical properties modification of coal after CO₂ sequestration in deep unmineable coal seams

Experimental Study on the Effects of Stress Variations on the Permeability of Feldspar-Quartz Sandstone

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Impacts of mineralogical compositions on different trapping mechanisms during long-term CO2 storage in deep saline aquifers

Cited by 25 publications

References 89 publications

Simulation and Analysis of Long-Term CO2 Trapping for the Shenhua CCS Demonstration Project in the Ordos Basin

Simulation and Analysis of Long-Term CO2 Trapping for the Shenhua CCS Demonstration Project in the Ordos Basin

Experimental study of physical‐chemical properties modification of coal after CO2 sequestration in deep unmineable coal seams

Experimental Study on the Effects of Stress Variations on the Permeability of Feldspar-Quartz Sandstone

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Simulation and Analysis of Long-Term CO₂ Trapping for the Shenhua CCS Demonstration Project in the Ordos Basin

Simulation and Analysis of Long-Term CO₂ Trapping for the Shenhua CCS Demonstration Project in the Ordos Basin

Experimental study of physical‐chemical properties modification of coal after CO₂ sequestration in deep unmineable coal seams