Prediction of hydrocarbon recovery from turbidite sandstones with linked-debrite facies

numerical flow-simulation studies

Lawrence Amy, Simon Peachey, Andrew Richard Gardiner, Peter J Talling

    Research output: Contribution to journalArticle

    Abstract

    A series of two-dimensional numerical flow simulations were carried out to investigate the production characteristics of a sheet sandstone bed with a linked-debrite interval. A deterministic geological model was used based on a two-dimensional representation of a bed from the Marnoso Arenacea Formation. The model was 60 km long and ~1 m thick and contained three zones, arranged in a vertical facies arrangement typical of many linked-debrite beds: i) a lower, coarse-to-medium grained, clean turbidite sandstone interval; ii) a middle, muddy sandstone, debrite interval; iii) an upper, fine-grained, clean, laminated sandstone interval. Simulation involved only a 3-km long sector of the model, with one injector well and one production well, placed 1-km apart in the middle of the sector model. The simulated sector was moved progressively down the length of the bed, in 1-km steps, sampling different parts of the bed with different facies proportions. The petrophysical properties of the debrite interval were varied to produce different porosity-permeability cases. All other modelling parameters, including the upper and lower interval petrophysics, were kept constant. Results indicate that, in most cases, key production parameters such as cumulative oil production with time and water cut are proportional to the volume of movable oil between the wells. This relationship does not hold, however, for cases with relatively low values of debrite porosity (=0.15) and permeability (kh = 100 mD) where the debrite interval accounts for more than 20% of the interwell volume. In these models, production efficiency declines systematically with reducing reservoir quality and increasing debrite percentage, resulting in relatively low oil production and early water breakthrough. © 2009 Elsevier Ltd. All rights reserved.

    Original languageEnglish
    Pages (from-to)2032-2043
    Number of pages12
    JournalMarine and Petroleum Geology
    Volume26
    Issue number10
    DOIs
    Publication statusPublished - Dec 2009

    Fingerprint

    turbidite
    sandstone
    hydrocarbon
    prediction
    simulation
    oil production
    porosity
    permeability
    well
    water
    oil
    sampling
    modeling
    parameter

    Keywords

    • Debrite
    • Numerical flow simulation
    • Oil production
    • Turbidite
    • Two-phase flow

    Cite this

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    title = "Prediction of hydrocarbon recovery from turbidite sandstones with linked-debrite facies: numerical flow-simulation studies",
    abstract = "A series of two-dimensional numerical flow simulations were carried out to investigate the production characteristics of a sheet sandstone bed with a linked-debrite interval. A deterministic geological model was used based on a two-dimensional representation of a bed from the Marnoso Arenacea Formation. The model was 60 km long and ~1 m thick and contained three zones, arranged in a vertical facies arrangement typical of many linked-debrite beds: i) a lower, coarse-to-medium grained, clean turbidite sandstone interval; ii) a middle, muddy sandstone, debrite interval; iii) an upper, fine-grained, clean, laminated sandstone interval. Simulation involved only a 3-km long sector of the model, with one injector well and one production well, placed 1-km apart in the middle of the sector model. The simulated sector was moved progressively down the length of the bed, in 1-km steps, sampling different parts of the bed with different facies proportions. The petrophysical properties of the debrite interval were varied to produce different porosity-permeability cases. All other modelling parameters, including the upper and lower interval petrophysics, were kept constant. Results indicate that, in most cases, key production parameters such as cumulative oil production with time and water cut are proportional to the volume of movable oil between the wells. This relationship does not hold, however, for cases with relatively low values of debrite porosity (=0.15) and permeability (kh = 100 mD) where the debrite interval accounts for more than 20{\%} of the interwell volume. In these models, production efficiency declines systematically with reducing reservoir quality and increasing debrite percentage, resulting in relatively low oil production and early water breakthrough. {\circledC} 2009 Elsevier Ltd. All rights reserved.",
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    Prediction of hydrocarbon recovery from turbidite sandstones with linked-debrite facies : numerical flow-simulation studies. / Amy, Lawrence; Peachey, Simon; Gardiner, Andrew Richard; Talling, Peter J.

    In: Marine and Petroleum Geology, Vol. 26, No. 10, 12.2009, p. 2032-2043.

    Research output: Contribution to journalArticle

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