Rapport (Rapport Contrat/Projet) Année : 2017

Geological model, deposit block model and reservoir model report

Résumé

Geological models of subsurface structures and physical properties are essential ingredients for studying physical processes and preparing for in-situ leaching studies. In this report, we present the modelling strategy to build models for representing the geological structures and for simulating fluid flow and petrophysical properties. Three classes of models have been generated using GOCAD-SKUA® software, with different scale and level of detail: - A detailed regional scale model, which contains a model of the geological structures (main faults and horizons) in the North Sudetic Trough area. It is based on models produced in the framework of ProMine project. - A simplified regional scale model, which comprises a model of geological structures, a stratigraphic grid with petrophysical properties and a hydrogeological model for Eclipse fluid flow simulator. It covers the same region as the detailed regional model but the geological structures have been simplified. - A district scale model, which covers a smaller region delineated within the regional model. It contains a structural model, a stratigraphic grid with grades and fluid flow properties, and a fluid flow simulation model for Eclipse. - An example of well field scale model containing petrophysical properties for studying fracture propagation processes. The different models have been exported in different file formats to be easily shared with BIOMOre partners. To this end, file format converters have been developed based on the RINGMesh library. Structural models are presented in the form of sets of geological surfaces represented by triangulated surfaces. Fluid flow models are represented as stratigraphic grids exported in gocad and eclipse formats. These models are not to be taken for an accurate representation of structural and petrophysical properties. Because of the limited amount of data, especially for controlling petrophysical properties and grades, assumptions have been taken in the modelling processes. The proposed simulation strategy produces properties that globally honour the statistical data but whose value might locally differ from actual values where it is not directly constrained by observations. This does not lower the interest of such models as the main objective of this study was to define a modelling strategy and produce a set of models for feeding the development of the modelling tool box in WP2. This only means that additional data should be collected for locally constraining petrophysical properties and structures in preparation for pilot plant design studies.

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Dates et versions

insu-05229618 , version 1 (29-08-2025)

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  • HAL Id : insu-05229618 , version 1

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Gautier Laurent, Jean-Jacques Royer, Fabrice Golfier, Lev Filippov, Yulia Gruzdeva, et al.. Geological model, deposit block model and reservoir model report. De-170313-0030, Horizon H2020 Projects. 2017, pp.68. ⟨insu-05229618⟩
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