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Journal articlePan I, Korre A, Durucan S, 2014,
Integrating Queuing Theory and Finite Automata in a Systems Framework for Financial Risk Modelling of Engineering Process Systems
, 24TH EUROPEAN SYMPOSIUM ON COMPUTER AIDED PROCESS ENGINEERING, PTS A AND B, Vol: 33, Pages: 1297-1302, ISSN: 1570-7946 -
Journal articleSyed A, Durucan S, Shi J, et al., 2013,
Flue Gas Injection for CO2 Storage and Enhanced Coalbed Methane Recovery: Mixed Gas Sorption and Swelling Characteristics of Coals
, Energy Procedia, Vol: 37, Pages: 6738-6745, ISSN: 1876-6102The impact of coal pore structure on adsorption-induced matrix swelling of three coals of different ranks was investigated experimentally. The swelling strain measurements for the selected samples of the two higher rank coals suggested that variation in the sample pore size distribution, particularly the microporosity, has a larger impact on matrix swelling induced by adsorption of CO2 than by adsorption of less adsorbing gases. The swelling behaviour recorded for the low rank coal may be explained by the level of microporosity or lack of it. From flue gas ECBM point of view, the swelling strain data tentatively suggests that the low rank coal would experience less swelling, compared to the higher rank coals.
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Journal articleShi J, Imrie C, Sinayuc C, et al., 2013,
Snøhvit CO2 Storage Project: Assessment of CO2 Injection Performance Through History Matching of the Injection Well Pressure Over a 32-months Period
, Energy Procedia, Vol: 37, Pages: 3267-3274, ISSN: 1876-6102A performance assessment study of the Snøhvit CO2 project, where approximately 1.1 million tonnes of CO2 have been injected into a fault segment of the Snøhvit field was carried out. Since the start of CO2 injection, the injection well pressure has risen at a rate faster than what is sustainable for a 25-years expected lifetime of the project. An important element of the history matching effort is the incorporation of fluvial facies in the reservoir model to reflect the sedimentary environment in the sandstone Tubåen formation. With the help of 4D seismic analysis, excellent match to both the flowing and shut-in bottom-hole pressure data throughout a 32-months injection period have been obtained. The outcomes of this study suggest that the fluvial depositional environment, together with the fact that the injection well is situated in a fault-segment, have contributed to a significant reduction in the injectivity at F2H.
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Journal articleNie Z, Korre A, Durucan S, 2013,
Full Chain Analysis and Comparison of Gas-Fired Power Plants with Co2 Capture and Storage with Clean Coal Alternatives
, Energy Procedia, Vol: 37, Pages: 2840-2847, ISSN: 1876-6102This paper presents the new models developed for the natural gas fuelled power generation chain, involving various natural gas production methods, gas processing routes, gas transport options, and alternative gas based power generation with/without CO2 capture. The comprehensive and quantitative Life Cycle Inventory (LCI) database developed models inputs/outputs of processes at high level of detail, allowing to account for technical and geographic differences in the power generation value chain scenarios analysed. With the advantage of LCI models developed at unit process level, this work successfully identified the key operational parameters for alternative gas-fuelled power plants and the key component processes that emit the majority of GHGs across the gas supply chains.
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Journal articleKühn M, Wipki M, Durucan S, et al., 2013,
Key Site Abandonment Steps in CO2 Storage
, Energy Procedia, Vol: 37, Pages: 4731-4740, ISSN: 1876-6102The European Commission published a set of Guidance Documents to assist countries and stakeholders to implement the EU Directive 2009/31/EC on geological storage of CO2. The main objectives of the CO2CARE project are closely linked to the three high-level requirements of the Directive with regard to post-closure transfer of liability of a storage site to the relevant competent authority: (i) absence of any detectable leakage, (ii) conformity of actual behaviour of the injected CO2 with the modelled behaviour, and (iii) the storage site is evolving towards a situation of long-term stability. Guidelines for regulatory compliance and “Best Practice” for site abandonment are being established by distillation and integration of all research findings into site closure and abandonment protocols. The work is based on 9 key injection sites in Europe and worldwide.
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Journal articleKorre A, Durucan S, Shi J, et al., 2013,
Development of Key Performance Indicators for CO2 Storage Operability and Efficiency Assessment: Application to the Southern North Sea Rotliegend Group
, Energy Procedia, Vol: 37, Pages: 4894-4901, ISSN: 1876-6102This paper outlines the development of a methodology which can be used to produce key performance indicators for operability and efficiency of a CO2 storage site. The methodology is based on the premise that individual geological formations and their characteristics can be assessed on the basis of their depositional and tectonic setting and more recent reservoir/site history using hydrocarbon exploration and development data. The methodology is illustrated for a candidate storage reservoir in the Rotliegend Leman Sandstone Formation of the UK Southern North Sea.
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Journal articleDurucan S, Ahsan M, Syed A, et al., 2013,
Two Phase Relative Permeability of Gas and Water in Coal for Enhanced Coalbed Methane Recovery and CO2 Storage
, Energy Procedia, Vol: 37, Pages: 6730-6737, ISSN: 1876-6102Gas-water relative permeability behaviour of seven European coals of different ranks was characterised in order to enhance the scientific understanding of the fundamental processes of two-phase flow taking place within the macrostructure of coal. Laboratory experiments were carried out on cylindrical coal samples using the unsteady state method to measure gas-water relative permeabilities due to its operational simplicity. The impact of factors such as wettability, absolute permeability and overburden pressure on coal relative permeability were assessed. Considerable variation in the shapes of the relative permeability curves for different rank coals was observed, which was attributed to the heterogeneous nature of coal.
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Journal articleSmith J, Durucan S, Korre A, et al., 2013,
A Methodology to Assess Increased Storage Capacity Provided by Fracture Networks at CO2 Storage Sites: Application to in Salah Storage Site
, Energy Procedia, Vol: 37, Pages: 3711-3718, ISSN: 1876-6102The presence of fractures in the storage reservoir at CO2 storage sites may increase the reservoir permeability and subsequently cause the CO2 plume extent to increase. Similarly, fractures in the caprock could provide regions of secondary storage if CO2 escapes from the reservoir. An important factor influencing the degree of these effects is whether the fractures form a continuously connected, or percolating, pathway. A methodology assessing the existence of percolating network of fractures, which incorporates the uncertainties in measured fracture properties around wells, was applied to assess secondary storage in the lower caprock at the In Salah Storage Site. It is demonstrated that secondary storage will occur if the fracture line density is equal to or greater than 2 m-1 and further shown what length distributions will provide secondary storage, if line density is less than 2 m-1.
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Conference paperBacci G, Durucan S, Korre A, 2013,
Experimental and Numerical Study of the Effects of Halite Scaling on Injectivity and Seal Performance During CO2 Injection in Saline Aquifers
, Pages: 3275-3282, ISSN: 1876-6102Vaporisation of water during dry CO2 injection can cause salt precipitation and lead to significant reduction in injectivity. Research described in this paper aimed at improving the understanding of the halite scaling process through experimental and numerical investigations. Experimental results indicated porosity reductions of about 3 - 5% and permeability reduction between 13 to 75%. Numerical simulation results have shown that halite scaling can have a significant impact on field operations. They also suggested that, salt precipitation can occur at the caprock interface increasing the sealing capacity around the wellbore.
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Journal articleGovindan R, Korre A, Durucan S, 2013,
Application of an Unsupervised Methodology for the Indirect Detection of CO2 Leakages Around the Laacher See in Germany using Remote Sensing Data
, Energy Procedia, Vol: 37, Pages: 4057-4064, ISSN: 1876-6102Remote sensing has demonstrated success in various environmental applications and is considered attractive as it offers cheap and effective wide area monitoring. Recent research efforts, and particularly the development of an unsupervised image processing and indirect detection methodology by the authors, have demonstrated the potential of remote sensing techniques for monitoring CO2 storage sites. This paper describes the application of the methodology at a natural analogue study site around the lake Laacher in Germany using airborne optical remote sensing datasets. The results demonstrate the robustness of the methodology as an indirect technique for CO2 leakage detection.
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