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  • Journal article
    Alajmi H, King PR, 2011,

    Assessment of development methods for a heavy-oil sandstone reservoir in Middle East: Part II: Numerical evaluation of thermal recovery methods in a hetrogenos system

    , Society of Petroleum Engineers - SPE Enhanced Oil Recovery Conference 2011, EORC 2011, Vol: 1, Pages: 86-102

    A combination of growing energy demand, declining performance of conventional oil fields and attractive oil prices have renewed interests in both the heavy oil resources and the methods of exploiting them. However, their low mobility precludes relying on natural drive mechanisms for their extraction. Given that there are a very large number of EOR methods and to accelerate decision-making, a relatively simple screening procedure has been developed and implemented. Several simulation runs were conducted, investigating the effects of petrophysical properties and operating variables on performances of thermal and non-thermal flood processes. Then, a detailed economic analysis was performed to assess the economic feasibility of each recovery process/scenario. This work has contributed significantly toward our understanding of the mechanisms of thermal injection in high permeability heavy oil reservoir. This is critical in the decision on the applicability of thermal recovery methods and its field application success. Copyright 2011, Society of Petroleum Engineers.

  • Journal article
    Iglauer S, Paluszny A, Pentland C, Blunt MJet al., 2011,

    Residual CO2 imaged with x-ray micro-tomography

    , Geophysical Research Letters, Vol: 38, ISSN: 1944-8007

    Carbon capture and storage (CCS), where CO2 is injectedinto geological formations, has been identified as an importantway to reduce CO2 emissions to the atmosphere. While thereare several aquifers worldwide into which CO2 has beeninjected, there is still uncertainty in terms of the long‐termfate of the CO2. Simulation studies have proposed capillarytrapping – where the CO2 is stranded as pore‐space dropletssurrounded by water – as a rapid way to secure safe storage.However, there has been no direct evidence of pore‐scaletrapping. We imaged trapped super‐critical CO2 clusters ina sandstone at elevated temperatures and pressures,representative of storage conditions using computed micro‐tomography (m‐CT) and measured the distribution oftrapped cluster size. The clusters occupy 25% of the porespace. This work suggests that locally capillary trapping isan effective, safe storage mechanism in quartz‐richsandstones

  • Journal article
    Bijeljic B, Mostaghimi P, Blunt MJ, 2011,

    Signature of Non-Fickian Solute Transport in Complex Heterogeneous Porous Media

    , PHYSICAL REVIEW LETTERS, Vol: 107, ISSN: 0031-9007
  • Journal article
    Jackson MD, Vinogradov J, Saunders JH, Jaafar MZet al., 2011,

    Laboratory Measurements and Numerical Modeling of Streaming Potential for Downhole Monitoring in Intelligent Wells

    , SPE JOURNAL, Vol: 16, Pages: 625-636, ISSN: 1086-055X
  • Journal article
    Mathias SA, de Miguel GJGM, Thatcher KE, Zimmerman RWet al., 2011,

    Pressure Buildup During CO2 Injection into a Closed Brine Aquifer

    , TRANSPORT IN POROUS MEDIA, Vol: 89, Pages: 383-397, ISSN: 0169-3913
  • Conference paper
    Cuevas J, Llovell F, Galindo A, Vesovic V, Segura H, Perez-Correa JRet al., 2011,

    Solid-liquid equilibrium using the SAFT-VR equation of state: Solubility of naphthalene and acetic acid in binary mixtures and calculation of phase diagrams

    , Symposium on 20 Years of the SAFT Equation of State Recent Advances and Challenges, Publisher: ELSEVIER, Pages: 137-147, ISSN: 0378-3812
  • Journal article
    David EC, Zimmerman RW, 2011,

    Elastic moduli of solids containing spheroidal pores

    , INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE, Vol: 49, Pages: 544-560, ISSN: 0020-7225
  • Journal article
    Ardjmandpour N, Pain C, Singer J, Saunders J, Aristodemou E, Carter Jet al., 2011,

    Artificial neural network forward modelling and inversion of electrokinetic logging data

    , GEOPHYSICAL PROSPECTING, Vol: 59, Pages: 721-748, ISSN: 0016-8025
  • Journal article
    Gulamali MY, Leinov E, Jackson MD, 2011,

    Self-potential anomalies induced by water injection into hydrocarbon reservoirs

    , Geophysics, Vol: 76, Pages: F283-F292, ISSN: 1942-2156

    The injection of cold water into a hydrocarbon reservoir containingrelatively warmer, more saline formation brine may generateself-potential anomalies as a result of electrokinetic,thermoelectric, and=or electrochemical effects. We havenumerically assessed the relative contributions of these effectsto the overall self-potential signal generated during oil productionin a simple hydrocarbon reservoir model. Our aim was todetermine if measurements of self-potential at a production wellcan be used to detect the movement of water toward the well.The coupling coefficients for the electrochemical and thermoelectricpotentials are uncertain, so we considered four differentmodels for them. We also investigated the effect of altering thesalinities of the formation and injected brines. We found thatthe electrokinetic potential peaked at the location of the saturationfront (reaching values of 0.2 mV even for the most salinebrine considered). Moreover, the value at the production wellincreased as the front approached the well, exceeding the noiselevel ( 0.1 mV). Thermoelectric effects gave rise to largerpotentials in the reservoir (10 mV), but values at the wellwere negligible ð Þ .0:1 mV until after water breakthroughbecause of the lag in the temperature front relative to the saturationfront. Electrochemical potentials were smaller in magnitudethan thermoelectric potentials in the reservoir but were measurableð Þ > 0:1 mV at the well because the salinity front wasclosely associated with the saturation front. When the formationbrine was less saline (1 mol=liter), electrokinetic effects dominated;at higher salinities (5 mol=liter), electrochemicaleffects were significant. We concluded that the measurement ofself-potential signals in a production well may be used to monitorthe movement of water in hydrocarbon reservoirs duringproduction, but further research is required to understand thethermoelectric and electrochemical coupling coefficients in partiallysatu

  • Journal article
    Alkindi AS, Al-Wahaibi YM, Muggeridge AH, 2011,

    Experimental and Numerical Investigations Into Oil-Drainage Rates During Vapor Extraction of Heavy Oils

    , SPE JOURNAL, Vol: 16, Pages: 343-357, ISSN: 1086-055X
  • Journal article
    Bijeljic B, Markicevic B, Navaz HK, 2011,

    Capillary climb dynamics in the limits of prevailing capillary and gravity force

    , PHYSICAL REVIEW E, Vol: 83, ISSN: 1539-3755
  • Journal article
    Deveugle PEK, Jackson MD, Hampson GJ, Farrell ME, Sprague AR, Stewart J, Calvert CSet al., 2011,

    Characterization of stratigraphic architecture and its impact on fluid flow in a fluvial-dominated deltaic reservoir analog: Upper Cretaceous Ferron Sandstone Member, Utah

    , AAPG Bulletin, Vol: 95, Pages: 693-727, ISSN: 0149-1423
  • Journal article
    Choi K, Jackson MD, Hampson GJ, Jones ADW, Reynolds ADet al., 2011,

    Predicting the impact of sedimentological heterogeneity on gas–oil and water–oil displacements: fluvio-deltaic Pereriv Suite Reservoir, Azeri–Chirag–Gunashli Oilfield, South Caspian Basin

    , Petroleum Geoscience, Vol: 17, Pages: 143-163, ISSN: 1354-0793
  • Conference paper
    Hihinashvili R, Blumenfeld R, 2011,

    Structural Characterization of Porous and Granular Materials

    , 16th European Symposium on Improved Oil Recovery 2011

    The morphological details of permeable porous materials impact significantly their macro-scale properties and in particular transport properties (e.g. permeability). A programme to derive macroscopic behaviour and responses from pore-scale information is a holy grail in the field. We report here progress on, and tests of, a recently proposed such a programme.The main steps of the programme are as follows. The solid phase of a porous material is first skeletonised into a framework of nodes and edges. Then the local structure is quantified by means of structure tensors, which describe the shape of novel volume elements called quadrons. Next, the local tensor description is used in an entropy-based statistical formalism to compute macroscopic structural characteristics as expectation values over a certain partition function. From the structural characteristics, physical properties can be evaluated. The 'thickened' structure is taken account of with an additional partition function, giving more accurate evaluation of structural and physical properties.Here we present tests for the initial stages of the programme. The tests are carried out on numerically generated two-dimensional granular aggregates. Specifically, we describe results on the statistics of the quadrons and the structural tensors.

  • Journal article
    Pentland CH, El-Maghraby R, Iglauer S, Blunt MJet al., 2011,

    Measurements of the capillary trapping of super-critical carbon dioxide in Berea sandstone

  • Journal article
    Bijeljic B, Rubin S, Scher H, Berkowitz Bet al., 2011,

    Non-Fickian transport in porous media with bimodal structural heterogeneity

    , JOURNAL OF CONTAMINANT HYDROLOGY, Vol: 120-21, Pages: 213-221, ISSN: 0169-7722
  • Journal article
    Dentz M, Le Borgne T, Englert A, Bijeljic Bet al., 2011,

    Mixing, spreading and reaction in heterogeneous media: A brief review

    , JOURNAL OF CONTAMINANT HYDROLOGY, Vol: 120-21, Pages: 1-17, ISSN: 0169-7722
  • Journal article
    David EC, Zimmerman RW, 2011,

    Compressibility and shear compliance of spheroidal pores: Exact derivation via the Eshelby tensor, and asymptotic expressions in limiting cases

    , INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, Vol: 48, Pages: 680-686, ISSN: 0020-7683
  • Journal article
    Zanganeh MN, Kam SI, LaForce TC, Rossen WRet al., 2011,

    The Method of Characteristics Applied to Oil Displacement by Foam

    , SPE JOURNAL, Vol: 16, Pages: 8-23, ISSN: 1086-055X
  • Book chapter
    Smalley PC, Muggeridge A, 2011,

    Reservoir Compartmentalization: get it before it gets you

    , Reservoir Compartmentalization, Editors: Jolley, Fisher, Ainsworth, Vrolijk, Delisle, Publisher: Geological Society of London, Pages: 25-42, ISBN: 9781862393165
  • Journal article
    Hellmann R, Bich E, Vogel E, Vesovic Vet al., 2011,

    Ab initio intermolecular potential energy surface and thermophysical properties of hydrogen sulfide

    , PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Vol: 13, Pages: 13749-13758, ISSN: 1463-9076
  • Journal article
    Sadeghnejad S, Masihi M, King PR, Shojaei A, Pishvaie Met al., 2011,

    A Reservoir Conductivity Evaluation Using Percolation Theory

    , PETROLEUM SCIENCE AND TECHNOLOGY, Vol: 29, Pages: 1041-1053, ISSN: 1091-6466
  • Journal article
    Sadeghnejad S, Masihi M, King PR, Shojaei A, Pishvaie Met al., 2011,

    Estimating reservoir connectivity & permeability during early reservoir life by percolation theory and case study

    , 73rd European Association of Geoscientists and Engineers Conference and Exhibition 2011: Unconventional Resources and the Role of Technology. Incorporating SPE EUROPEC 2011, Vol: 5, Pages: 3686-3690

    Reservoir connectivity and effective permeability evaluation is of great importance in reservoir forecast that is used for decision making on various possible development scenarios. During the early stage of life of a field when data are scares, these parameters are usually based on analogues or rules of thumb and not detailed reservoir modeling. Therefore, there is a great incentive to produce much simpler physically-based methodologies to predict reservoir connectivity and effective permeability very quickly especially for engineering purposes. This can be addressed by using percolation approach. In this paper we used percolation approach in fast estimation of reservoir connectivity and effective permeability during early lift of reservoir. To validate the approach, we have used Burgan reservoir dataset of Norouz offshore oil field in south of IRAN. We have shown that the reservoir connectivity and effective permeability predictions from percolation approach gives reliable results once compared with exact numerically obtained results from modeling of real field data. Moreover the first approach as obtained from algebraic manipulation is very fast whereas the latter is so costly and time consuming.

  • Journal article
    Babaei M, King PR, 2011,

    A comparison between wavelet and renormalization upscaling methods and iterative upscaling-downscaling scheme

    , Society of Petroleum Engineers - SPE Reservoir Simulation Symposium 2011, Vol: 1, Pages: 469-479

    For all the advances in computational power of modern computers the problem of upscaling the properties of geological reservoir models is an ongoing challenge for reservoir simulation. Unfortunately, the upscaling of parameters like absolute permeability in single phase flow produces errors due to discarding the subgrid complexities. For tackling this problem, reconstruction techniques have been developed to downscale the local dynamic regions of the reservoir. Nonetheless, the upscaling part of these methods still has a significant effect on the final results since a poor upscaling can lead to errors even if coarse scale solution is downscaled or refined. In this work we focus on application of a range of conventional upscaling methods including pressure-solver, Renormalization, renormalization based modifications and wavelet transmissibility upscaling. We simulate incompressible flooding scenarios in two and three dimensions. The results are subsequently compared to a modified local-global upscaling method coupled with modified nested-gridding downscaling. CPU runtime, error in breakthrough time and production values are the parameters considered in the comparative analysis. We show improvements by iteration in providing better coarse scale solutions compared to conventional upscaling methods. Finally, we hope that this study can present a reliable ranking of renormalization and wavelet methods compared to iterative reconstruction method in terms of the trade-off between precision and speed. Copyright 2011, Society of Petroleum Engineers.

  • Journal article
    Alkhatib AM, King PR, 2011,

    Applying real options theory in determining optimal policies for a surfactant flood

    , Society of Petroleum Engineers - SPE Enhanced Oil Recovery Conference 2011, EORC 2011, Vol: 2, Pages: 1139-1150

    Wide scale implementation of surfactant EOR faces many challenges mainly due to the uncertainty in field application. It is important to have the ability to manage this uncertainty to produce optimal implementation policies. This paper suggests the use of Real Options theory as a possible decision making and evaluation method in surfactant flooding. Real Option theory is based on the concepts of the options traded in stock markets applied to real projects. Real Options theory provides a dynamic framework to manage uncertainty and it also provides evaluation methods to produce quantifiable outputs. The Least Squares Monte Carlo (LSM) algorithm is the evaluation method used in this paper. The algorithm was applied using an example case based on a synthetic reservoir model. The option evaluated was that of finding the optimal time for starting the surfactant flood. It was assumed that the life of the reservoir was 10 years. The option decision nodes were chosen to be at the start of years 4, 5, 6 and 7. The analysis was performed using Schlumberger's ECLIPSE as the numerical simulator for the surfactant flood and a code was written in MATLAB to run the different simulations and the LSM algorithm. The LSM algorithm demonstrated that, at this basic level, it can produce an optimal policy for a specific option. It was found that most of the optimal surfactant flood starting-times were at year 6. This was mostly due to its proximity to the breakthrough time of the model which was during year 5. The optimal injection policies recommended achieved, on average, an increase in recovery efficiencies of 0.123, 0.147 and 0.141 for Cases 1, 2 and 3 respectively in contrast to the no-option scenario of initiating the surfactant flood at the start of the reservoir life (year 0). These values represent the value of the flexibility in initiating surfactant flooding. This method is being considered for more complex and realistic situations. Copyright 2011, Society of Petroleum Engineer

  • Journal article
    Vinogradov J, 2011,

    Multiphase streaming potential in sandstones saturated with gas/brine and oil/brine during drainage and imbibition

    , Geophysical Research Letters
  • Journal article
    Alkindi A, Al-Wahaibi Y, Bijeljic B, Muggeridge Aet al., 2011,

    Investigation of longitudinal and transverse dispersion in stable displacements with a high viscosity and density contrast between the fluids

    , Journal of Contaminant Hydrology, Vol: 120-121, Pages: 170-183
  • Conference paper
    Latham J-P, Xiang J, Harrison JP, Munjiza Aet al., 2011,

    Development of Virtual Geoscience Simulation Tools, VGeST for irregular blocky rock applications in rock engineering using the combined finite discrete element method, FEMDEM

    , 44th US Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, Publisher: Curran Associates, Pages: 965-976
  • Conference paper
    xiang J, Latham J-P, Harrison JP, 2011,

    A Numeric Simulation of Rock Avalanches Using the Combined Finite-Discrete Element Method,FEMDEM

    , 44th US Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, Pages: 921-927
  • Conference paper
    Harrison JP, Xiang J, Latham JP, 2011,

    Stress Heterogeneity in a Fractured Rock Mass Modelled with the Combined Finite-DiscreteElement Method

    , 44th US Rock Mechanics Symposium and 5th U.S.-Canada Rock Mechanics Symposium, Pages: 1051-1056

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