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• Journal article
  Iglauer S, Paluszny A, Blunt MJ, 2015,

  Simultaneous oil recovery and residual gas storage: A pore-level analysis using in situ X-ray micro-tomography (vol 103, pg 905, 2013)

  , FUEL, Vol: 139, Pages: 780-780, ISSN: 0016-2361
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  • Citations: 2
• Journal article
  Hellmann R, Bich E, Vogel E, Vesovic Vet al., 2014,

  Intermolecular potential energy surface and thermophysical properties of the CH4-N-2 system

  , JOURNAL OF CHEMICAL PHYSICS, Vol: 141, ISSN: 0021-9606
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  • Citations: 26
• Journal article
  Singh G, Zimmerman RW, 2014,

  Modification of Griffith-McClintock-Walsh model for crack growth under compression to incorporate stick-slip along the crack faces

  , INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES, Vol: 72, Pages: 311-318, ISSN: 1365-1609
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  • Citations: 6
• Journal article
  Raeini AQ, Blunt MJ, Bijeljic B, 2014,

  Direct simulations of two-phase flow on micro-CT images of porous media and upscaling of pore-scale forces

  , ADVANCES IN WATER RESOURCES, Vol: 74, Pages: 116-126, ISSN: 0309-1708
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  • Citations: 103
• Journal article
  Andrew M, Bijeljic B, Blunt MJ, 2014,

  Pore-by-pore capillary pressure measurements using X-ray microtomography at reservoir conditions: Curvature, snap-off, and remobilization of residual CO2

  , WATER RESOURCES RESEARCH, Vol: 50, Pages: 8760-8774, ISSN: 0043-1397
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  • Citations: 62
• Journal article
  Blumenfeld R, Edwards SF, 2014,

  Granular statistical mechanics - a personal perspective

  , EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS, Vol: 223, Pages: 2189-2204, ISSN: 1951-6355
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  • Citations: 4
• Journal article
  Kang PK, de Anna P, Nunes JP, Bijeljic B, Blunt MJ, Juanes Ret al., 2014,

  Pore-scale intermittent velocity structure underpinning anomalous transport through 3-D porous media

  , GEOPHYSICAL RESEARCH LETTERS, Vol: 41, Pages: 6184-6190, ISSN: 0094-8276
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  • Citations: 67
• Journal article
  Boot-Handford ME, Abanades JC, Anthony EJ, Blunt MJ, Brandani S, Mac Dowell N, Fernandez JR, Ferrari M-C, Gross R, Hallett JP, Haszeldine RS, Heptonstall P, Lyngfelt A, Makuch Z, Mangano E, Porter RTJ, Pourkashanian M, Rochelle GT, Shah N, Yao JG, Fennell PSet al., 2014,

  Carbon capture and storage update

  , ENERGY & ENVIRONMENTAL SCIENCE, Vol: 7, Pages: 130-189, ISSN: 1754-5692
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• Journal article
  Singh G, Kermode JR, De Vita A, Zimmerman RWet al., 2014,

  Validity of linear elasticity in the crack-tip region of ideal brittle solids

  , INTERNATIONAL JOURNAL OF FRACTURE, Vol: 189, Pages: 103-110, ISSN: 0376-9429
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  • Citations: 11
• Journal article
  Lei Q, Latham J-P, Xiang J, Tsang C-F, Lang P, Guo Let al., 2014,

  Effects of geomechanical changes on the validity of DFN representation of a realistic 2D fractured rock

  , International Journal of Rock Mechanics and Mining Sciences, Vol: 70, Pages: 507-523

  This paper aims to examine the validity of the discrete fracture network (DFN) method in representing a realistic two-dimensional fractured rock in terms of their geomechanical response to in-situ stresses and hydraulic behaviour in a steady state fluid field. First, a real fracture network is extracted from the geological map of an actual rock outcrop, which is termed the analogue fracture network (AFN). Multiple DFN realisations are created using the statistics of the analogue pattern. A conductivity parameter that was found to have a linear relationship with the conductivity of 2D fracture networks is included to further enhance network similarity. A series of numerical experiments are designed with far-field stresses applied at a range of angles to the rock domains and their geomechanical response is modelled using the combined finite-discrete element method (FEMDEM). A geomechanical comparison between the AFN and its DFN equivalents is made based on phenomena such as heterogeneity of fracture-dependent stress contours, sliding between pre-existing fracture walls, coalescence of propagating fractures and variability of aperture distribution. Furthermore, an indirect hydro-mechanical (HM) coupling is applied and the hydraulic behaviour of the porous rock models is investigated using the hybrid finite element-finite volume method (FEFVM). A further comparison is conducted focusing on the hydraulic behaviour of the AFN and DFNs under the effects of geomechanical changes. The results show that although DFNs may represent an AFN quite well for fixed mechanical conditions, such a representation may not be dependable if mechanical changes occur.

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• Journal article
  Leinov E, Jackson MD, 2014,

  Experimental measurements of the SP response to concentration and temperature gradients in sandstones with application to subsurface geophysical monitoring

  , JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, Vol: 119, Pages: 6855-6876, ISSN: 2169-9313
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  • Citations: 11
• Journal article
  Tariq U, Jusoh ARB, Riesco N, Vesovic Vet al., 2014,

  Reference Correlation of the Viscosity of Cyclohexane from the Triple Point to 700 K and up to 110 MPa

  , JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA, Vol: 43, ISSN: 0047-2689
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  • Citations: 10
• Journal article
  Siena M, Guadagnini A, Riva M, Bijeljic B, Pereira Nunes JP, Blunt MJet al., 2014,

  Statistical scaling of pore-scale Lagrangian velocities in natural porous media

  , PHYSICAL REVIEW E, Vol: 90, ISSN: 2470-0045
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  • Citations: 12
• Journal article
  Amaechi B, Iglauer S, Pentland CH, Bijeljic B, Blunt MJet al., 2014,

  An Experimental Study of Three-Phase Trapping in Sand Packs

  , TRANSPORT IN POROUS MEDIA, Vol: 103, Pages: 421-436, ISSN: 0169-3913
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  • Citations: 5
• Journal article
  Umla R, Vesovic V, 2014,

  Viscosity of liquids-Enskog-2 sigma model

  , FLUID PHASE EQUILIBRIA, Vol: 372, Pages: 34-42, ISSN: 0378-3812
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  • Citations: 4
• Journal article
  Andrew M, Bijeljic B, Blunt MJ, 2014,

  Pore-scale contact angle measurements at reservoir conditions using X-ray microtomography

  , ADVANCES IN WATER RESOURCES, Vol: 68, Pages: 24-31, ISSN: 0309-1708
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  • Citations: 119
• Journal article
  Dale A, John CM, Mozley PS, Smalley PC, Muggeridge AHet al., 2014,

  Time-capsule concretions: Unlocking burial diagenetic processes in the Mancos Shale using carbonate clumped isotopes

  , EARTH AND PLANETARY SCIENCE LETTERS, Vol: 394, Pages: 30-37, ISSN: 0012-821X
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  • Citations: 63
• Journal article
  Solano JMS, Jackson MD, Sparks RSJ, Blundy Jet al., 2014,

  Evolution of major and trace element composition during melt migration through crystalline mush: Implications for chemical differentiation in the crust

  , American Journal of Science, Vol: 314, Pages: 895-939, ISSN: 0002-9599

  We present the first quantitative model of heat, mass and both majorand trace element transport in a mush undergoing compaction that accounts forcomponent transport and chemical reaction during melt migration and which isapplicable to crustal systems. The model describes the phase behavior of binarysystems (both eutectic and solid solution), with melt and solid compositions determinedfrom phase diagrams using the local temperature and bulk composition. Traceelement concentration is also determined. The results demonstrate that componenttransport and chemical reaction generate compositional variation in both major andtrace elements that is not captured by existing geochemical models. In particular, wefind that, even for the simplest case of a homogenous, insulated column that isinstantaneously melted then allowed to compact, component transport and reactionleads to spatial variations in major element composition that, in this case, producesmelt that is more enriched in incompatible elements than predicted by batch melting.In deep crustal hot zones (DCHZ), created by the repeated intrusion of hot, mantlederivedmagmas, buoyant melt migrating upwards accumulates in high porosity layers,but has a composition corresponding to only a small fraction of batch melting, becauseit has locally equilibrated with mush at low temperature; moreover, melt migration andchemical reaction in a layered protolith may lead to the rapid formation of highporosity melt layers at the interface between different rock compositions. In both ofthese cases, the melt in the high porosity layer(s) is less enriched in incompatible traceelements than predicted if it is assumed that melt with the same major elementcomposition was produced by batch melting. This distinctive decoupling of major andtrace element fractionation may be characteristic of magmas that originate in DCHZ.Application of the model to a number of crustal systems, including the Ivrea-Verbanozone, the Rum layered intrusion, and the Hol

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• Journal article
  Deveugle PEK, Jackson MD, Hampson GJ, Stewart J, Clough MD, Ehighebolo T, Farrell ME, Calvert CS, Miller JKet al., 2014,

  A comparative study of reservoir modeling techniques and their impact on predicted performance of fluvial-dominated deltaic reservoirs

  , AAPG BULLETIN, Vol: 98, Pages: 729-763, ISSN: 0149-1423
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  • Citations: 18
• Journal article
  Matsushima T, Blumenfeld R, 2014,

  Universal Structural Characteristics of Planar Granular Packs

  , PHYSICAL REVIEW LETTERS, Vol: 112, ISSN: 0031-9007
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  • Citations: 9
• Journal article
  Andrew M, Bijeljic B, Blunt MJ, 2014,

  Pore-scale imaging of trapped supercritical carbon dioxide in sandstones and carbonates

  , INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL, Vol: 22, Pages: 1-14, ISSN: 1750-5836
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  • Citations: 103
• Journal article
  Amin SM, Weiss DJ, Blunt MJ, 2014,

  Reactive transport modelling of geologic CO2 sequestration in saline aquifers: The influence of pure CO2 and of mixtures of CO2 with CH4 on the sealing capacity of cap rock at 37 degrees C and 100 bar

  , CHEMICAL GEOLOGY, Vol: 367, Pages: 39-50, ISSN: 0009-2541
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  • Citations: 24
• Journal article
  Fitch PJR, Jackson MD, Hampson GJ, John CMet al., 2014,

  Interaction of stratigraphic and sedimentological heterogeneities with flow in carbonate ramp reservoirs: impact of fluid properties and production strategy

  , PETROLEUM GEOSCIENCE, Vol: 20, Pages: 7-26, ISSN: 1354-0793
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  • Citations: 11
• Journal article
  Guadagnini A, Blunt MJ, Riva M, Bijeljic Bet al., 2014,

  Statistical Scaling of Geometric Characteristics in Millimeter Scale Natural Porous Media

  , TRANSPORT IN POROUS MEDIA, Vol: 101, Pages: 465-475, ISSN: 0169-3913
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  • Citations: 13
• Journal article
  Carriero A, Zimmermann EA, Paluszny A, Tang SY, Bale H, Busse B, Alliston T, Kazakia G, Ritchie RO, Shefelbine SJet al., 2014,

  How Tough Is Brittle Bone? Investigating Osteogenesis Imperfecta in Mouse Bone

  , Journal of Bone and Mineral Research, Vol: 29, Pages: 1392-1401, ISSN: 1523-4681

  The multiscale hierarchical structure of bone is naturally optimized to resist fractures. In osteogenesis imperfecta, or brittle bone disease, genetic mutations affect the quality and/or quantity of collagen, dramatically increasing bone fracture risk. Here we reveal how the collagen defect results in bone fragility in a mouse model of osteogenesis imperfecta (oim), which has homotrimeric α1(I) collagen. At the molecular level, we attribute the loss in toughness to a decrease in the stabilizing enzymatic cross-links and an increase in nonenzymatic cross-links, which may break prematurely, inhibiting plasticity. At the tissue level, high vascular canal density reduces the stable crack growth, and extensive woven bone limits the crack-deflection toughening during crack growth. This demonstrates how modifications at the bone molecular level have ramifications at larger length scales affecting the overall mechanical integrity of the bone; thus, treatment strategies have to address multiscale properties in order to regain bone toughness. In this regard, findings from the heterozygous oim bone, where defective as well as normal collagen are present, suggest that increasing the quantity of healthy collagen in these bones helps to recover toughness at the multiple length scales.

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• Journal article
  Raeini AQ, Bijeljic B, Blunt MJ, 2014,

  Numerical Modelling of Sub-pore Scale Events in Two-Phase Flow Through Porous Media

  , TRANSPORT IN POROUS MEDIA, Vol: 101, Pages: 191-213, ISSN: 0169-3913
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  • Citations: 45
• Conference paper
  Menke HP, Bijeljic B, Andrew MG, Blunt Met al., 2014,

  Dynamic pore-scale imaging of reactive transport in heterogeneous carbonates at reservior conditions

  , Pages: 2554-2558

  Four carbonate rock types were studied, two relatively homogeneous carbonates, Ketton and Mt. Gambier, and two very heterogeneous carbonates, Estalliades and Portland Basebed. Each rock type was imaged using dynamic x-ray microtomography under the same reservoir and flow conditions to gain insight into the impact of heterogeneity. A 4-mm carbonate core was injected with CO2-saturated brine at 10 MPa and 50oC for 2 hours. Depending on sample heterogeneity and X-ray source, tomographic images were taken at between 30-second and 20-minute time-resolutions and a 4-micron spatial resolution during injection. Changes in porosity, permeability, and structure were obtained and a pore-throat network was extracted. Furthermore, pore-scale flow modelling was performed directly on the binarized image and used to track velocity distributions as the pore network evolved.

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• Conference paper
  Nunes JPP, Raeini AQ, Bijeljic B, Blunt MJet al., 2014,

  Simulation of carbonate dissolution at the porescale using a streamline method

  , Pages: 2549-2553

  Carbon dioxide is currently being injected into saline aquifers and depleted oil and gas reservoirs with both enhanced oil recovery (EOR) and carbon capture and storage (CCS) purposes. The injected CO2 in contact with the reservoir fluids creates an acidic mixture that can potentially react with the host rock causing changes in the petrophysical properties of the reservoir. From the experimental point of view much work has been recently published in the scientific literature about the impact of acidic brine in carbonate reservoirs. These laboratory results indicate that strong rock-fluid interactions may occur, however, pore-scale models capable of predicting how the petrophysical changes associated with these reactions can be related to transport properties are yet to be developed. The recent increase in computational power and tomographic capability made possible the acquisition of high resolution images of heterogeneous carbonates that are very suitable to study in detail the flow and transport properties of such rocks. In this paper we demonstrate how micro-CT images of carbonate rocks can be used to model reactive transport at the pore scale. We apply a particle tracking algorithm based on a pore-scale streamline tracing method to simulate carbonate dissolution.

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  • Citations: 1
• Conference paper
  Andrew MG, Bijeljic B, Blunt MJ, 2014,

  Reservoir-condition pore-scale imaging -contact angle, wettability, dynamics and trapping

  , Pages: 2804-2808

  Firstly capillary trapping is examined in a range of five different rock types, including both carbonates and sandstones. Rocks are imaged both after drainage and imbibition, and in all cases between 65-70% of the CO2 in place after drainage was trapped. Trapped cluster size distributions are compared to rock connectivity as determined using pore network modelling. Better connected pore-spaces tend to have more large clusters relative to small clusters, and visa-versa. This is important as small clusters are more difficult to remobilise by viscous and gravitational forces. They also present a relatively larger surface area for reaction and mineralization. Secondarily wettability is analysed by measuring contact angle manually. In order to do this the contact line was found in 3D and the data set resampled onto planes perpendicular to the contact line at a particular point. Contact angles ranging from 35-55o were found, indicating that the super-critical CO2-brine-carbonate system is weakly water wet. The range in contact angles is interpreted as the result of contact angle hysteresis associated with surface heterogeneity. Finally the first images of CO2 drainage at reservoir conditions are also presented, imaged at Diamond Light Source, represented an unprecented depth of information about pore-scale flow processes.

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• Journal article
  Go J, Bortone I, Smalley PC, Muggeridge Aet al., 2014,

  Predicting Vertical Flow Barriers Using Tracer Diffusion in Partially Saturated, Layered Porous Media

  , Transport in Porous Media
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