Simulation of geomechanical responses of reservoirs induced by CO 2 multilayer injection in the Shenhua CCS project, China

Zhu, Qianlin; Zuo, Dianjun; Zhang, Shaoliang; Zhang, Yuting; Wang, Yongsheng; Wang, Linlin

doi:10.1016/j.ijggc.2015.08.017

Cited by 35 publications

(15 citation statements)

References 23 publications

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“…The Shenhua CCS Project is located in the east section of the northern Yishan Slope in the Ordos Basin, which is an ideal place for large-scale CO 2 storage in geological formations in China [28]. The Triassic and Permian sandstone of the Ordos Basin are recognized as deep saline aquifers that have significant potential for CO 2 geological sequestration.…”

Section: Geological Settingmentioning

confidence: 99%

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: Geological Settingmentioning

confidence: 99%

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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“…However, there are many geomechanical issues, which can take place because of pressure buildup in depleted hydrocarbon reservoirs and aquifers which may not be totally eliminated by a combined production. These geomechanical issues have been covered in numerous studies by (i) predictions of the vertical uplift due to the increase in pore pressure (Ferronato et al, 2010;Karimnezhad et al, 2014;Shi and Durucan, 2009;Shi et al, 2013;Tillner et al, 2014;Zhu et al, 2015); (ii) modelling of fault reactivations due to injection (Ferronato et al, 2010;Kim and Hosseini, 2014;Olden et al, 2012;Rutqvist et al, 2007;Tillner et al, 2014;Vidal-Gilbert et al, 2010;Zhang et al, 2015); and (iii) analysis of fractures generation within the reservoir and caprock (Alonso et al, 2012;Chiaramonte et al, 2011;Ferronato et al, 2010;Goodarzi et al, 2011;Kim and Hosseini, 2014;Lynch et al, 2013;Rutqvist et al, 2008;Shi and Durucan, 2009). For instance, Rutqvist et al (2007) proposed a fully coupled numerical analysis to estimate the maximum sustainable injection pressure for the slip tendency of faults in a twophase system considering continuum stress-strain and discrete fault assessments.…”

Section: Geomechanical Effects Related To Co2 Injection 1stress Changesmentioning

confidence: 99%

Integrity analysis of CO 2 storage sites concerning geochemical-geomechanical interactions in saline aquifers

Raza

Gholami

Sarmadivaleh

et al. 2016

Journal of Natural Gas Science and Engineering

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A systematic and careful analysis of changes in the magnitude of geomechanical parameters is essential to mitigate the risk of leakage from CO2 storage sites. However, depending on rocks and storage sites, these changes might be different due to chemical reactions taking place, especially when it comes to saline aquifers. There have only been few studies carried out in the past to evaluate the maximum sustained pressure of rocks being exposed to these chemical interactions. However, more studies are still required to evaluate the strength of the storage medium or seals when different kinds of rocks and fluids (fresh water or brine) are included in the hostile environment of a storage site. In this paper, attempts were made to evaluate changes in the variation of geomechanical parameters of the Berea sandstone during and after the injection of supercritical CO2 in a short period of time. The results obtained indicated that the presence of brine in the pore space during injection enhances the severity of geochemical reactions, causing reductions in the magnitudes of elastic parameters including shear modulus. Having a good look into the SEM images of the sample before and after exposure to scCO2 indicated that these changes can be attributed to the dissolution/fracturing of calcite and clays in the matrix of the sample. Although findings were provided based on the pulse measurements tests, more studies are required to have a deeper understanding as to how geochemical reactions may cause difficulties during and after injection into a storage site.

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“…9,10 Many coupled fluid flow and geomechanical studies have been done in the past decade to simulate the vertical ground movement, caprock fracturing, and fault reactivation in aquifers upon CO 2 injection. [11][12][13][14][15][16][17][18] There have also been many numerical 2,19-21 and experimental 22-26 studies addressing the time-dependent geomechanical integrity of sandstone aquifers. Likewise, there are also some experimental research works studying the mineral-CO 2 -brine chemical reactions in carbonate.…”

Section: Introductionmentioning

confidence: 99%

“…Many coupled fluid flow and geomechanical studies have been done in the past decade to simulate the vertical ground movement, caprock fracturing, and fault reactivation in aquifers upon CO 2 injection . There have also been many numerical and experimental studies addressing the time‐dependent geomechanical integrity of sandstone aquifers.…”

Section: Introductionmentioning

confidence: 99%

Impact of geochemical and geomechanical changes on CO₂ sequestration potential in sandstone and limestone aquifers

et al. 2019

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CO2 storage in different geological formations has been recognized as one of the promising mitigation approaches to reduce the emission of CO2 into the atmosphere. There are many complex hydro‐chemo‐mechanical interactions (effective stress changes, water acidification, and mineral dissolution) that may take place in a storage site during or after injection, reducing the integrity of formations in the short or long term. Although there have been several studies carried out in the past to assess the feasibility of sandstones and limestone formations as a safe CO2 storage site, the effect of hydrological, mechanical, and chemical processes on the storage site integrity has not been deeply addressed. The aim of this study is to couple thermo‐hydro‐chemo‐mechanical processes upon CO2 injection and assess their impact on the key storage aspects of quartz‐rich sandstone and calcite‐rich limestone. A numerical model was built to simulate CO2 flooding into a saline aquifer with sandstone and limestone composition for 500 years. The results obtained indicated that geochemical activity and CO2 dissolution are significantly higher in limestone and may increase the porosity by ∼16%. During injection, a decrease in the reservoir strength was observed in both rock types upon exposure to CO2. A remarkable variation in the geomechanical characteristics was also revealed in the sandstone after injection. However, ground displacements (subsidence) of 0.0017 and 0.033 m were, respectively, observed in sandstone and limestone aquifers, at the end of 500 years. It is recommended to consider a high‐strength reservoir for carbon capture and storage (CCS) projects in order to reduce the likelihood of compaction. It was also found that both rock types have a good storage capacity, injectivity, and trapping potentials (the structural and dissolution trappings) to capture and hold CO2 in place. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Simulation of geomechanical responses of reservoirs induced by CO 2 multilayer injection in the Shenhua CCS project, China

Cited by 35 publications

References 23 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

Integrity analysis of CO 2 storage sites concerning geochemical-geomechanical interactions in saline aquifers

Impact of geochemical and geomechanical changes on CO₂ sequestration potential in sandstone and limestone aquifers

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Simulation of geomechanical responses of reservoirs induced by CO 2 multilayer injection in the Shenhua CCS project, China

Cited by 35 publications

References 23 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

Integrity analysis of CO 2 storage sites concerning geochemical-geomechanical interactions in saline aquifers

Impact of geochemical and geomechanical changes on CO2 sequestration potential in sandstone and limestone aquifers

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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

Impact of geochemical and geomechanical changes on CO₂ sequestration potential in sandstone and limestone aquifers