Including a Regional Trend in Reservoir Modelling Using the Truncated Gaussian Method

Beucher, Hélène; Galli, Alain; Loc’h, Gaëlle Le; Ravenne, C.

doi:10.1007/978-94-011-1739-5_43

Cited by 30 publications

(13 citation statements)

References 3 publications

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“…Truncation thresholds depend on the proportions of facies in each litho-unit and on the relationship between the different lithotypes (contacts and transitions). The Gaussian Random Function is stationary but the proportions (hence the thresholds) can vary in space (Beucher et al, 1993;Galli et al, 1994;Le Loch and Galli, 1996;Doligez et al, 2007). This method was applied to litho-units corresponding to point bar deposits (litho-units 1, 2 and 6), and to chute channels heterogeneously filled by sands and shales (litho-units 5, 8 and 9).…”

Section: Geostatistical Parametersmentioning

confidence: 99%

Analysis of Heavy Oil Recovery by Thermal EOR in a Meander Belt: From Geological to Reservoir Modeling

Deschamps

Guy²,

Preux³

et al. 2012

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Section: Geostatistical Parametersmentioning

confidence: 99%

Analysis of Heavy Oil Recovery by Thermal EOR in a Meander Belt: From Geological to Reservoir Modeling

Deschamps

Guy²,

Preux³

et al. 2012

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…Truncation thresholds depend on the proportions of facies in each litho-unit. The Gaussian Random Function is stationary, but the proportions (hence, the thresholds) can vary in space (Beucher et al 1993;Galli et al 1994;Le Loc'h & Galli 1997). The VPC computed from well data (Fig.…”

Section: Litho-unit Simulationmentioning

confidence: 98%

Connectivity estimation between turbiditic channels and overbank deposits from the modelling of an outcrop analogue (Pab Formation, Maastrichtian, Pakistan)

Eschard

Deschamps

Doligez

et al. 2013

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The facies associations of the overflow deposits associated with turbidite channels were studied in the outcrops of the Maastrichtian Pab Sandstone, in SW Pakistan. In this area, a basin-floor fan was preserved from the platform to the deep basin setting. In the mid-fan setting, a channel complex crops out in three dimensions, and consists of a dozen channels and their overflow deposits, including levees, crevasse lobes and spill-over lobes. The overbank deposits can be directly in contact with the channel-fill, but, in many cases, matrix-supported debris-flow deposits made lenses close to the channel base. Heterolithic drapes of thin-bedded turbidite deposits were also preserved along the channel margins. A three-dimensional (3D) static model describing the heterogeneity distribution within the turbiditic channel complex was compiled using both stochastic and deterministic approaches in a site where two channels were laterally connected by overbank deposits. Petro-acoustic properties derived from a subsurface database were then assigned to the facies to perform seismic simulations. The synthetic seismic simulations showed that the channel base can easily be misinterpreted compared to the geological model. Dynamic modelling, such as well test and streamline simulations, was also performed using the model to assess the transition between the channel and overbank deposits from a dynamic point of view. As a result of the streamline simulations, the overbank deposits connecting the channel homogenized the pressure regime in the reservoir. However, the sweeping efficiency of water injection can be affected by the heterogeneity distribution along the channel margins. A significant volume of oil could also be by-passed because of the occurrence of early water breakthrough through the spill-over lobes, or because the flow slowed down when it reached the heterogeneity along the channel margin.

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“…This flag shows the allowed and forbidden contacts between domains (in the present example, all the domains are in contact), while the thresholds determine the proportion of space covered by each domain. When the domain proportions are not constant in space, one can consider the use of spatially varying thresholds [3]. The spatial behavior of the domains mainly depends on that of the underlying Gaussian random fields; for instance, the anisotropy of the second Gaussian random field (Y 2 ) in Figure 4 leads to an anisotropic behavior for domains 2 and 3, but not for domain 1 that is defined only on the basis of the first Gaussian random field (Y 1 ).…”

Section: Plurigaussian Simulationmentioning

confidence: 99%

Application of plurigaussian simulation to delineate the layout of alteration domains in Sungun copper deposit

2013

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An accurate estimation of mineral grades in ore deposits with heterogeneous spatial variations requires defining geological domains that differentiate the types of mineralogy, alteration and lithology. Deterministic models define the layout of the domains based on the interpretation of the drill holes and do not take into account the uncertainty in areas with fewer data. Plurigaussian simulation (PGS) can be an alternative to generate multiple numerical models of the ore body, with the aim of assessing the uncertainty in the domain boundaries and improving the geological controls in the characterization of quantitative attributes. This study addresses the application of PGS to Sungun porphyry copper deposit (Iran), in order to simulate the layout of four hypogene alteration zones: potassic, phyllic, propylitic and argillic. The aim of this study is to construct numerical models in which the alteration structures reflect the evolution observed in the geology.

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Including a Regional Trend in Reservoir Modelling Using the Truncated Gaussian Method

Cited by 30 publications

References 3 publications

Analysis of Heavy Oil Recovery by Thermal EOR in a Meander Belt: From Geological to Reservoir Modeling

Analysis of Heavy Oil Recovery by Thermal EOR in a Meander Belt: From Geological to Reservoir Modeling

Connectivity estimation between turbiditic channels and overbank deposits from the modelling of an outcrop analogue (Pab Formation, Maastrichtian, Pakistan)

Application of plurigaussian simulation to delineate the layout of alteration domains in Sungun copper deposit

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