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Integrated simulations of CO2 spreading and pressure response in the multilayer saline aquifer of South Scania Site, Sweden
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.ORCID iD: 0000-0002-9417-5586
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences. Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources (KIGAM).
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences.
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2016 (English)In: Greenhouse Gases: Science and Technology, E-ISSN 2152-3878, GHG1583Article in journal (Refereed) Accepted
Abstract [en]

An integrated modeling approach/workflow, in which a series of mathematical models of different levels of complexity are applied to evaluate the geological storage capacity of the Scania Site, southwest Sweden, is presented. The storage formation at the site is a layered formation limited by bounding fault zones, and injection is assumed to take place from one existing deep borehole into all layers. A semi-analytical model for two-phase flow is first used to evaluate the pressure response and related parameter sensitivity, as well as the first estimates of acceptable injection rates. These results are then used to guide the more detailed numerical simulations that address both pressure response and plume migration. The vertical equilibrium (VE) model is used to obtain a preliminary understanding of the plume migration with a larger number of simulations. Finally the full TOUGH2/ECO2N simulations are performed for the most detailed analyses of pressure responses and plume migration. Throughout, the results of the different modeling approaches are compared against each other. It is concluded that the key limiting factor for the storage capacity at the site in the injection scenario considered is the fast CO2 migration within the high permeability layer. Future studies can address alternative injection scenarios, including horizontal injection wells and injection to other layers than the high permeability layer.

Place, publisher, year, edition, pages
2016. GHG1583
Keyword [en]
CO2; Geological storage; Storage capacity; Injectivity; Numerical simulation; Semi-analytical solution; Vertical equilibrium
National Category
Oceanography, Hydrology, Water Resources Geophysical Engineering
URN: urn:nbn:se:uu:diva-279718DOI: 10.1002/ghg.1583OAI: oai:DiVA.org:uu-279718DiVA: diva2:908746
EU, FP7, Seventh Framework Programme, MustangEU, FP7, Seventh Framework Programme, PanaceaEU, FP7, Seventh Framework Programme, Trust
Available from: 2016-03-03 Created: 2016-03-03 Last updated: 2016-08-26
In thesis
1. CO2 storage in deep saline aquifers: Models for geological heterogeneity and large domains
Open this publication in new window or tab >>CO2 storage in deep saline aquifers: Models for geological heterogeneity and large domains
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Alternative title[zh]
二氧化碳的深部盐水层地质封存 : 储层非均质性及大尺度模型的研究
Abstract [en]

This work presents model development and model analyses of CO2 storage in deep saline aquifers. The goal has been two-fold, firstly to develop models and address the system behaviour under geological heterogeneity, second to tackle the issues related to problem scale as modelling of the CO2 storage systems can become prohibitively complex when large systems are considered.

The work starts from a Monte Carlo analysis of heterogeneous 2D domains with a focus on the sensitivity of two CO2  storage performance measurements, namely, the injectivity index (Iinj) and storage efficiency coefficient (E), on parameters characterizing heterogeneity. It is found that E and Iinj are determined by two different parameter groups which both include correlation length (λ) and standard deviation (σ) of the permeability. Next, the issue of upscaling is addressed by modelling a heterogeneous system with multi-modal heterogeneity and an upscaling scheme of the constitutive relationships is proposed to enable the numerical simulation to be done using a coarser geological mesh built for a larger domain. Finally, in order to better address stochastically heterogeneous systems, a new method for model simulations and uncertainty analysis based on a Gaussian processes emulator is introduced. Instead of conventional point estimates this Bayesian approach can efficiently approximate cumulative distribution functions for the selected outputs which are CO2 breakthrough time and its total mass. After focusing on reservoir behaviour in small domains and modelling the heterogeneity effects in them, the work moves to predictive modelling of large scale CO2  storage systems. To maximize the confidence in the model predictions, a set of different modelling approaches of varying complexity is employed, including a semi-analytical model, a sharp-interface vertical equilibrium (VE) model and a TOUGH2MP / ECO2N model. Based on this approach, the CO2 storage potential of two large scale sites is modelled, namely the South Scania site, Sweden and the Dalders Monocline in the Baltic Sea basin.

The methodologies developed and demonstrated in this work enable improved analyses of CO2 geological storage at both small and large scales, including better approaches to address medium heterogeneity. Finally, recommendations for future work are also discussed.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2016. 70 p.
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1390
CO2, Carbon Capture Storage, Storage Capacity, Injectivity, Monte Carlo, Gaussian, Permeability, Upscaling, 二氧化碳, 地質封存, 高斯仿真, 滲透係數, 非均質性, 升尺度, 存儲效能, 場地模擬, 不確定性, 壓力累積
National Category
Geosciences, Multidisciplinary
urn:nbn:se:uu:diva-279382 (URN)978-91-554-9625-8 (ISBN)
Public defence
2016-09-16, Hamberg, Villavägen 16, Uppsala, 13:15 (English)
Available from: 2016-08-24 Created: 2016-03-01 Last updated: 2016-10-12

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Tian, Liang
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LUVALDepartment of Earth Sciences
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