Recovery efficiency from a turbidite sheet system

numerical simulation of waterflooding using outcrop-based geological models

    Research output: Contribution to journalArticle

    Abstract

    A series of waterflood simulations were performed to investigate the effect of basinal position and facies permeability within a turbidite sheet system on oil recovery efficiency. Simulations used three-dimensional outcrop models of the Peïra Cava system, comprising gravel, sandstone, thin-bedded heterolithic and mudstone facies.

    Recovery efficiency declines with increasing permeability heterogeneity and is influenced by the interaction of vertical bed-permeability trends and floodfront
    gravity slumping. The occurrence of gravels with permeabilities lower than overlying sandstones produces optimum recoveries. High permeability gravels act as thief zones, enhanced by downward gravity slumping, reducing normalized recovery by up to 34 %. The effect of thief zones on recovery is related to their permeability contrast, abundance, thickness, lateral continuity,
    vertical position within permeable units and the permeability of underlying facies.

    Proximal to distal stratigraphic variations produce relatively small differences
    in normalized recovery of up to 13 % in models with the highest permeability
    heterogeneity. Differences in recovery are interpreted to reflect spatial
    trends in facies architecture, which determine the effectiveness of high permeability gravel thief zones. The poorest recovery is recorded from the medial
    model where recovery is lower than distal areas because of higher gravel abundance and thicknesses and lower compared to proximal areas because of the higher lateral continuity of gravels and underlying low-permeability mudstones.
    Original languageEnglish
    Pages (from-to)123-138
    Number of pages16
    JournalPetroleum Geoscience
    Volume19
    Issue number2
    DOIs
    Publication statusPublished - May 2013

    Fingerprint

    turbidite
    outcrop
    permeability
    gravel
    simulation
    slumping
    mudstone
    sandstone
    gravity
    oil

    Cite this

    @article{fe03d16c56cf4e49b7389d7674b9e098,
    title = "Recovery efficiency from a turbidite sheet system: numerical simulation of waterflooding using outcrop-based geological models",
    abstract = "A series of waterflood simulations were performed to investigate the effect of basinal position and facies permeability within a turbidite sheet system on oil recovery efficiency. Simulations used three-dimensional outcrop models of the Pe{\"i}ra Cava system, comprising gravel, sandstone, thin-bedded heterolithic and mudstone facies.Recovery efficiency declines with increasing permeability heterogeneity and is influenced by the interaction of vertical bed-permeability trends and floodfrontgravity slumping. The occurrence of gravels with permeabilities lower than overlying sandstones produces optimum recoveries. High permeability gravels act as thief zones, enhanced by downward gravity slumping, reducing normalized recovery by up to 34 {\%}. The effect of thief zones on recovery is related to their permeability contrast, abundance, thickness, lateral continuity,vertical position within permeable units and the permeability of underlying facies.Proximal to distal stratigraphic variations produce relatively small differencesin normalized recovery of up to 13 {\%} in models with the highest permeabilityheterogeneity. Differences in recovery are interpreted to reflect spatialtrends in facies architecture, which determine the effectiveness of high permeability gravel thief zones. The poorest recovery is recorded from the medialmodel where recovery is lower than distal areas because of higher gravel abundance and thicknesses and lower compared to proximal areas because of the higher lateral continuity of gravels and underlying low-permeability mudstones.",
    author = "Lawrence Amy and Simon Peachey and Gardiner, {Andrew Richard} and Pickup, {Gillian Elizabeth} and Mackay, {Eric James} and Stephen, {Karl Dunbar}",
    year = "2013",
    month = "5",
    doi = "10.1144/petgeo2011-041",
    language = "English",
    volume = "19",
    pages = "123--138",
    journal = "Petroleum Geoscience",
    issn = "1354-0793",
    publisher = "Geological Society of London",
    number = "2",

    }

    TY - JOUR

    T1 - Recovery efficiency from a turbidite sheet system

    T2 - numerical simulation of waterflooding using outcrop-based geological models

    AU - Amy, Lawrence

    AU - Peachey, Simon

    AU - Gardiner, Andrew Richard

    AU - Pickup, Gillian Elizabeth

    AU - Mackay, Eric James

    AU - Stephen, Karl Dunbar

    PY - 2013/5

    Y1 - 2013/5

    N2 - A series of waterflood simulations were performed to investigate the effect of basinal position and facies permeability within a turbidite sheet system on oil recovery efficiency. Simulations used three-dimensional outcrop models of the Peïra Cava system, comprising gravel, sandstone, thin-bedded heterolithic and mudstone facies.Recovery efficiency declines with increasing permeability heterogeneity and is influenced by the interaction of vertical bed-permeability trends and floodfrontgravity slumping. The occurrence of gravels with permeabilities lower than overlying sandstones produces optimum recoveries. High permeability gravels act as thief zones, enhanced by downward gravity slumping, reducing normalized recovery by up to 34 %. The effect of thief zones on recovery is related to their permeability contrast, abundance, thickness, lateral continuity,vertical position within permeable units and the permeability of underlying facies.Proximal to distal stratigraphic variations produce relatively small differencesin normalized recovery of up to 13 % in models with the highest permeabilityheterogeneity. Differences in recovery are interpreted to reflect spatialtrends in facies architecture, which determine the effectiveness of high permeability gravel thief zones. The poorest recovery is recorded from the medialmodel where recovery is lower than distal areas because of higher gravel abundance and thicknesses and lower compared to proximal areas because of the higher lateral continuity of gravels and underlying low-permeability mudstones.

    AB - A series of waterflood simulations were performed to investigate the effect of basinal position and facies permeability within a turbidite sheet system on oil recovery efficiency. Simulations used three-dimensional outcrop models of the Peïra Cava system, comprising gravel, sandstone, thin-bedded heterolithic and mudstone facies.Recovery efficiency declines with increasing permeability heterogeneity and is influenced by the interaction of vertical bed-permeability trends and floodfrontgravity slumping. The occurrence of gravels with permeabilities lower than overlying sandstones produces optimum recoveries. High permeability gravels act as thief zones, enhanced by downward gravity slumping, reducing normalized recovery by up to 34 %. The effect of thief zones on recovery is related to their permeability contrast, abundance, thickness, lateral continuity,vertical position within permeable units and the permeability of underlying facies.Proximal to distal stratigraphic variations produce relatively small differencesin normalized recovery of up to 13 % in models with the highest permeabilityheterogeneity. Differences in recovery are interpreted to reflect spatialtrends in facies architecture, which determine the effectiveness of high permeability gravel thief zones. The poorest recovery is recorded from the medialmodel where recovery is lower than distal areas because of higher gravel abundance and thicknesses and lower compared to proximal areas because of the higher lateral continuity of gravels and underlying low-permeability mudstones.

    U2 - 10.1144/petgeo2011-041

    DO - 10.1144/petgeo2011-041

    M3 - Article

    VL - 19

    SP - 123

    EP - 138

    JO - Petroleum Geoscience

    JF - Petroleum Geoscience

    SN - 1354-0793

    IS - 2

    ER -