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  • Journal article
    saunders J, jackson M, pain C, 2008,

    Fluid flow monitoring in oilfields using downhole measurements of electrokinetic potential

    , Geophysics, Vol: 73, Pages: E165-E180

    Downhole measurements of electrokinetic potential are a promising new technology for hydrocarbon reservoir monitoring. Using a 3Dfinite-element model combining both multiphase flow and electrokinetic components, we investigated the behavior of electrokinetic (streaming) potential during oil production in a range of reservoir environments. We found that streaming-potential signals originate at fluid fronts and at geologic boundaries where fluid saturation changes. As water encroaches on an oil production well, the streaming-potential signal associated with the water front encompasses the well even when the front is up to 100 m away, so the potential measured at the well starts to change significantly relative to a distant reference electrode. Variations in the geometry of the encroaching water front can be characterized using an array of electrodes positioned along the well, but a good understanding of the local reservoir geology is required to identify signals caused by the front. The streaming potential measured at a well is maximized in low-permeability reservoirs produced at a high rate and in thick reservoirs with low shale content. However, considerable uncertainties remain, particularly relating to the nature of electrokinetic coupling at high salinity and during multiphase flow. Our results suggest that the streaming potential at low salinity (10^-3–10^-4 mol/L) is large (100–1000 mV) but might become too small to resolve (<0.1) mV at high salinity (0.5–2 mol/L), depending on how the available data for the electrokinetic coupling at low salinity are extrapolated into the high-salinity domain. More work remains to determine the behavior of electrokinetic coupling and therefore the utility of this technique at high salinity.

  • Journal article
    Rushmer T, Jackson MD, 2008,

    Impact of melt segregation on tonalite–trondhjemite–granodiorite (TTG) petrogenesis

    , Trans. Royal Society of Edinburgh: Earth Science, Vol: 79, Pages: 325-336
  • Journal article
    Hopcroft PO, Gallagher K, Pain CC, 2007,

    Inference of past climate from borehole temperature data using bayesian reversible jump markov chain monte carlo

    , GEOPHYSICAL JOURNAL INTERNATIONAL, Vol: 171, Pages: 1430-1439, ISSN: 0956-540X
  • Journal article
    Meloy JR, Neethling SJ, Cilliers JJ, 2007,

    Geometric dispersion of unattached particles in foams

    , COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, Vol: 309, Pages: 246-253, ISSN: 0927-7757
  • Journal article
    Davison T, Collins GS, 2007,

    The effect of the oceans on the terrestrial crater size-frequency distribution: Insight from numerical modeling

    , METEORITICS & PLANETARY SCIENCE, Vol: 42, Pages: 1915-1927, ISSN: 1086-9379
  • Conference paper
    Farrell PE, Gorman GJ, Piggott MD, Pain CCet al., 2007,

    Some problems with quadratic fitting algorithm for Hessian recovery in the context of anisotropic mesh optimisation

    , International Conference on Adaptive Modeling and Simulation (ADMOS)
  • Journal article
    Meloy JR, Neethling SJ, Cilliers JJ, 2007,

    Modelling the axial dispersion of particles in froths

    , INTERNATIONAL JOURNAL OF MINERAL PROCESSING, Vol: 84, Pages: 185-191, ISSN: 0301-7516
  • Conference paper
    Bland PA, Artemieva NA, Bussey DBJ, Collins GS, Joy KHet al., 2007,

    Survival of asteroidal impactor material on the moon

    , 70th Annual Meeting of the Meteoritical-Society, Publisher: WILEY-BLACKWELL, Pages: A19-A19, ISSN: 1086-9379
  • Journal article
    Piggott MD, Pain CC, Gorman GJ, Killworth PD, Marshall DP, Allison PA, Umpleby AP, Cotter CJ, Fang F, Bricheno LM, West LJ, Johnson HL, Munday DR, Ham DA, Liu H, Kramer SC, Bond TM, Soufflet Y, Shipton J, Wells MR, Candy AS, Bain C, Roberts ZL, Martin BT, Farrell PE, Mitchell AJ, Shravat A, Tukova S, de Oliveira CRE, Goddard AJHet al., 2007,

    Multi-scale ocean modelling with adapting unstructured grids

    , CLIVAR Exchanges, Vol: 12, Pages: 21-23, ISSN: 1026-0471
  • Journal article
    Stekl I, Warner MR, Umpleby AP, 2007,

    3D frequency domain waveform inversion - Synthetic shallow channel example

    , 69th European Association of Geoscientists and Engineers Conference and Exhibition 2007: Securing The Future. Incorporating SPE EUROPEC 2007, Vol: 2, Pages: 893-897

    We are presenting a first example of 3D frequency domain acoustic inversion applied to a synthetics data over a shallow channel. High resolution images are obtained in less than a day CPU time using inexpensive hardware by utilizing a point iterative solver for wave equation modelling part of the code and multi shot approach. Tests have shown that it is possible to combine multiple shot positions and reduce time required for computation dramatically. Final recovered velocities are within 4% of the true velocity once and spatial positioning I quite well. We did not use any apriori information on anomaly position nor size.

  • Journal article
    Warner M, Stekl I, Umpleby A, 2007,

    Full wavefield seismic tomography - Iterative forward modelling, in 3D

    , 69th European Association of Geoscientists and Engineers Conference and Exhibition 2007: Securing The Future. Incorporating SPE EUROPEC 2007, Vol: 2, Pages: 888-892

    We have developed an efficient iterative solver for the 3D, two-way, acoustic wave equation, and demonstrate its use for 3D wavefield tomography on a synthetic seismic model. Using composite shots for the tomography, the method is sufficiently fast that it can be used to image realistic-sized field datasets.

  • Conference paper
    Xiang J, Munjiza A, Latham JP, 2007,

    On the validation of DEM and FEM/DEM models in 2D and 3D

    , Fourth International Conference on Discrete Element Methods
  • Report
    Fang F, Pain CC, Piggott MD, Gorman GJ, Goddard AJHet al., 2007,

    Data assimilation of three-dimensional free surface flow using an adaptive adjoint method: Part 1: Adjoint model formulation.

    , Imperial College London
  • Conference paper
    Gomes JLMA, Pain CC, de Oliveira CRE, Goddard AJHet al., 2007,

    A Numerical Investigation of Heat Transfer Mechanisms in Gas-Solid Fluidized Beds using the Two-Fluids Granular Temperature Model

    , Pages: 576-597
  • Conference paper
    Latham JP, Munjiza A, Garcia X, Xiang Jet al., 2007,

    Highly resolved particle shape for DEM and FEM/DEM simulation

    , Fourth International Conference on Discrete Element Methods
  • Journal article
    Wells MR, Allison PA, Piggott MD, Gorman GJ, Hampson GJ, Pain CC, Fang Fet al., 2007,

    Numerical modeling of tides in the late Pennsylvanian Midcontinent seaway of North America with implications for hydrography and sedimentation

    , JOURNAL OF SEDIMENTARY RESEARCH, Vol: 77, Pages: 843-865, ISSN: 1527-1404

    A novel numerical model (the Imperial College Ocean Model, ICOM) is used to simulate tidal circulation in shallow epicontinental seas connected to large, open oceans. ICOM is validated using the present-day North Sea and applied to predict tidal range in the late Pennsylvanian Midcontinent Seaway (LPMS) of North America. The model simulates the effect of the principal tidal constituents (astronomical tides) as well as the tide propagating from the adjacent open ocean (co- oscillating tide). Two ‘‘base-case’’ Pennsylvanian paleogeographies were tested: (1) a maximum sea-level highstand and (2) the early stages of a transgression. Sensitivity tests determined the importance of paleo-water depth and coastline uncertainty on the prediction of tidal range. During the highstand, tidal ranges in the craton interior (Midcontinent Shelf, Illinois and Appalachian basins) are consistently predicted as microtidal (, 2 m tidal range). Such low tidal ranges would have inhibited water-body mixing in the LPMS, promoting stratification. This, combined with the influx of oxygen-poor water from the Permian Basin to the west and high organic input from tropical rivers, may have contributed to the deposition of ‘‘core’’ black shales in LPMS cyclothems. Conversely, a mesotidal to macrotidal diurnal (once-daily tide) regime is predicted for the early transgression in a large-scale embayment in eastern Kansas due to resonant amplification of diurnal tidal constituents. Pennsylvanian strata here have been ascribed to a mesotidal to macrotidal setting and include cyclic rhythmites that suggest a strongly diurnal system, as predicted by ICOM.

  • Conference paper
    Choi K, Jackson MD, Hampson GJ, Jones A, Reynolds Tet al., 2007,

    Impact of heterogeneity on flow in fluvial-deltaic reservoirs: Implications for the giant ACG Field, south Caspian Basin (SPE 107137)

    , SPE Europec/EAGE Annual Conference, Publisher: Society of Petroleum Engineers paper 107137
  • Journal article
    Gorman GJ, Piggott MD, Pain CC, 2007,

    Shoreline approximation for unstructured mesh generation

    , Computers & Geosciences, Vol: 33, Pages: 666-677
  • Conference paper
    Farrell PE, Gorman GJ, Piggott MD, Pain CCet al., 2007,

    Quadratic fitting for Hessian recovery and anisotropic mesh optimisation

    , Barcelona, Spain, ADMOS 2007 - International Conference on Adaptive Modeling and Simulation, Publisher: International Center for Numerical Methods in Engineering (CIMNE), Pages: 101-104
  • Conference paper
    Latham JP, Munjiza A, Mindel J, Xiang J, Guises R, Pain C, Gorman G, Garcia Xet al., 2007,

    Towards simulation of concrete armour unit breakage under wave loads using coupled DEM, FEM/DEM and CFD

    , Fourth International Conference on Discrete Element Methods
  • Journal article
    Ham DA, Kramer SC, Stelling GS, Pietrzak Jet al., 2007,

    The symmetry and stability of unstructured mesh C-grid shallow water models under the influence of Coriolis

    , Ocean Modelling, Vol: 16, Pages: 47-60, ISSN: 1463-5003

    The symmetry and stability properties of two unstructured C-grid discretisations of the shallow water equations are discussed. We establish that a scheme in which the circumcentres of the mesh triangles are used as the surface elevation points has advantageous symmetry properties and derive a Coriolis discretisation which preserves these properties. It is shown that the resulting scheme is conservative in a discretised energy norm. We then establish that schemes in which the water surface elevations are stored at the mesh triangle centroids do not share these advantageous symmetry properties. Finally we show examples which demonstrate that the centroid based scheme is subject to unstable growing modes, particularly in long timescale, Coriolis dominated problems; while the energy conservative circurricentre based scheme suffers from no such limitation. We conclude that unstructured C-grid methods using the triangle circumcentres and the conservative Coriolis scheme derived here therefore have advantages for this sort of problem over those schemes based on centroids. (c) 2006 Elsevier Ltd. All rights reserved.

  • Conference paper
    Guises R, Munjiza A, Xiang J, Latham JPet al., 2007,

    Granular packing: numerical simulation and the characterisation of the effect of particle shape

    , Fourth International Conference on Discrete Element Methods
  • Report
    Fang F, Pain CC, Piggott MD, Gorman GJ, Goddard AJHet al., 2007,

    Data assimilation of three-dimensional free surface flow using an adaptive adjoint method: Part 2

    , Imperial College London
  • Conference paper
    Sech RP, Jackson MD, Hampson GJ, 2007,

    Controls on water cresting in high-productivity horizontal gas wells (SPE 107169)

    , SPE Europec/EAGE Annual Conference
  • Journal article
    Goldin TJ, Wunnemann K, Melosh HJ, Collins GSet al., 2006,

    Hydrocode modeling of the Sierra Madera impact structure

    , METEORIT PLANET SCI, Vol: 41, Pages: 1947-1958, ISSN: 1086-9379
  • Journal article
    Brett CE, Allison PA, Tsujita CJ, Soldani D, Moffat HAet al., 2006,

    Sedimentology, taphonomy, and paleoecology of meter-scale cycles from the Upper Ordovician of Ontario

    , PALAIOS, Vol: 21, Pages: 530-547, ISSN: 0883-1351
  • Journal article
    Allison PA, Wells MR, 2006,

    Circulation in large ancient epicontinental seas: What was different and why?

    , PALAIOS, Vol: 21, Pages: 513-515, ISSN: 0883-1351
  • Journal article
    Power PW, Pain CC, Piggott MD, Fang F, Gorman GJ, Umpleby AP, Goddard AJH, Navon IMet al., 2006,

    Adjoint A Posteriori Error Measures for Anisotropic Mesh Optimisation

    , Computers & Mathematics with Applications, Vol: 52, Pages: 1213-1242
  • Journal article
    Singer J, Saunders J, Holloway L, Stoll JB, Pain C, Stuart-Bruges W, Mason Get al., 2006,

    Electrokinetic logging has the potential to measure permeability

    , PETROPHYSICS, Vol: 47, Pages: 427-441, ISSN: 1529-9074
  • Journal article
    Neethling SJ, 2006,

    Effect of simple shear on liquid drainage within foams (vol 73, pg 061408, 2006)

    , PHYSICAL REVIEW E, Vol: 74, ISSN: 1539-3755
  • Journal article
    Latham J-P, Van Meulen J, Dupray S, 2006,

    Prediction of fragmentation and yield curves with reference to armourstone production

    , ENGINEERING GEOLOGY, Vol: 87, Pages: 60-74, ISSN: 0013-7952
  • Journal article
    Latham J-P, Lienhart D, Dupray S, 2006,

    Rock quality, durability and service life prediction of armourstone

    , ENGINEERING GEOLOGY, Vol: 87, Pages: 122-140, ISSN: 0013-7952
  • Journal article
    Higgs R, Wells MR, Allison PA, Piggott MD, Pain CC, Hampson GJ, de Oliveira CREet al., 2006,

    Discussion on large sea, small tides: the Late Carboniferous seaway of NW Europe

    , JOURNAL OF THE GEOLOGICAL SOCIETY, Vol: 163, Pages: 893-895, ISSN: 0016-7649
  • Journal article
    Saunders JH, Jackson MD, Pain CC, 2006,

    A new numerical model of electrokinetic potential response during hydrocarbon recovery

    , GEOPHYSICAL RESEARCH LETTERS, Vol: 33, ISSN: 0094-8276
  • Journal article
    Jiang S, Ziver AK, Carter JN, Pain CC, Goddard AJH, Franklin S, Phillips HJet al., 2006,

    Estimation of distribution algorithms for nuclear reactor fuel management optimisation

    , ANNALS OF NUCLEAR ENERGY, Vol: 33, Pages: 1039-1057, ISSN: 0306-4549
  • Journal article
    Wang Y, Neethling SJ, 2006,

    Simulating realistic froth surfaces

    , MINERALS ENGINEERING, Vol: 19, Pages: 1069-1076, ISSN: 0892-6875
  • Patent
    Singer J, Saunders J H, Pain C, 2006,

    Seismoelectric and acoustic permeability determination

    , GB2422433
  • Journal article
    Latham J-P, Van Meulen J, Dupray S, 2006,

    Prediction of in-situ block size distributions with reference to armourstone for breakwaters

    , ENGINEERING GEOLOGY, Vol: 86, Pages: 18-36, ISSN: 0013-7952
  • Journal article
    Pain CC, Eaton MD, Smedley-Stevenson RP, Goddard AJH, Piggott MD, de Oliveira CREet al., 2006,

    Streamline upwind Petrov-Galerkin methods for the steady-state Boltzmann transport equation

    , Computer Methods in Applied Mechanics and Engineering, Vol: 195, Pages: 4448-4472, ISSN: 0045-7825
  • Journal article
    Pain CC, Eaton MD, Smedley-Stevenson RP, Goddard AJH, Piggott MD, de Oliveira CREet al., 2006,

    Space-time streamline upwind Petrov-Galerkin methods for the Boltzmann transport equation

    , Computer Methods in Applied Mechanics and Engineering, Vol: 195, Pages: 4334-4357, ISSN: 0045-7825
  • Journal article
    Neethling SJ, 2006,

    Effect of simple shear on liquid drainage within foams

    , PHYSICAL REVIEW E, Vol: 73, ISSN: 1539-3755
  • Journal article
    Neethling SJ, Hadler K, Cilliers JJ, Stradling AWet al., 2006,

    The use of FrothSim to optimise the water addition to a column flotation cell

    , MINERALS ENGINEERING, Vol: 19, Pages: 816-823, ISSN: 0892-6875
  • Journal article
    Aristodemou E, Pain C, de Oliveira C, Umpleby A, Goddard T, Harris Cet al., 2006,

    Energy Group optimization for forward and inverse problems in nuclear engineering: application to downwell-logging problems

    , GEOPHYSICAL PROSPECTING, Vol: 54, Pages: 99-120, ISSN: 0016-8025
  • Journal article
    Grassia P, Neethling SJ, Cervantes C, Lee HTet al., 2006,

    The growth, drainage and bursting of foams

    , COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, Vol: 274, Pages: 110-124, ISSN: 0927-7757
  • Journal article
    Wünnemann K, Collins GS, Melosh HJ, 2006,

    A strain-based porosity model for use in hydrocode simulations of impacts and implications for transient crater growth in porous targets

    , ICARUS, Vol: 180, Pages: 514-527, ISSN: 0019-1035
  • Journal article
    Latham JP, Van Meulen J, Dupray S, 2006,

    The specification of armourstone gradings and EN 13383 (2002)

    , QUARTERLY JOURNAL OF ENGINEERING GEOLOGY AND HYDROGEOLOGY, Vol: 39, Pages: 51-64, ISSN: 1470-9236
  • Journal article
    Lathouwers D, van der Hagen THJJ, Agung A, Damn AV, Pain CC, de Oliveira CRE, Eaton MD, Goddard AJH, Gomes JLMAet al., 2006,

    On an improved design of a fluidized bed nuclear reactor - I: design modifications and steady-state features

    , Nuclear Technology, Vol: 153, Pages: 117-131
  • Journal article
    Gorman GJ, Piggott MD, Pain CC, de Oliveira CRE, Umpleby AP, Goddard JHet al., 2006,

    Optimisation based bathymetry approximation through constrained unstructured mesh adaptivity

    , Ocean Modelling, Vol: 12, Pages: 436-452, ISSN: 1463-5003
  • Conference paper
    Brito PR, Fernandez L, Pacho JD, 2006,

    Improving the performance of a three phase separator using CFD

    , International Oil and Gas CFD Conference
  • Journal article
    Power PW, Piggott MD, Fang F, Gorman GJ, Pain CC, Marshall DP, Goddard AJH, Navon IMet al., 2006,

    Adjoint goal-based error norms for adaptive mesh ocean modelling

    , Ocean Modelling, Vol: 15, Pages: 3-38, ISSN: 1463-5003

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