4 MEETING OF THE EUROPEAN 3D GEOMODELLING COMMUNITY · French Geological Referential Platform (RGF) improving the efficiency of model production and developing new modeling techniques

4TH MEETING OF THE EUROPEAN 3D GEOMODELLING COMMUNITY

DELIVERING SUBSURFACE MODELSFOR SOCIETAL CHALLENGES

P. TOULHOATBRGM Deputy CEO & Scientific Director

Orléans - FranceFebruary 2018, 21-23

BRGM FRENCH GEOLOGICAL SURVEY WWW.BRGM.FR

3D GEOLOGICAL MODELING AT BRGM 50 years of experience continuous production of multi-purpose 3D

geological modelso geological knowledgeo applications towards predictive

geosciences commercial tools (e.g. Petrel, Isatis, Surpac…) « home-made » innovative solutions:

o GDM Suite o GeoModellero and others standalone developments…

current target would be to combine and integrate all approaches in a common platform, implementing the transition from (desktop) tools to information systems

o easily explore existing modelso take the best from each approach and build

hybrid models (e.g. integration of BIM and/or LIDAR and geological models)

o open to collaborations

Plateau de SaultMartel et al., 2015

Albian and Neocomianaquifers of the Paris Basin

Bourgine, 2016


Geological Data Modeling

a set of complementary components:o delivery processing

viewer and web geological datao Interpolation

geostatistical toolbox, data modeling and exploration

o 2,5D modelingstratigraphical pile to combine multiple layers: interpolated thicknesses and/or elevations with an explicit descriptioni.e. f(x,y)

a focus on geological data managemento cross validation tools…


Bouillante geothermal field, GuadeloupeCalcagno et al., 2012

3D Geological Modeling originally developed for 3D geological

cartographyo 3D description of complex geological

architectures: erosions, fault networks, intrusions…

o co-kriging of both interfaces location and orientation data

o first software to use implicit geological modeling

geophysical forward and inverse modeling (Monte Carlo approach)

recent developments on unstructured mesh generation for simulation applications

collaboration with Intrepid Geophysics

Givet, ArdennesLacquement et al., 2011


SOME FIELDS OF RESEARCH AND DEVELOPMENT continuous production of multi-purpose 3D geological models for predictive

geoscienceso disseminate geological knowledge: storing and delivering geological models with

on-demand representation and visualizationo characterize subsurface resources: raw materials, water, energy…o sharing models for thematic applications: export informed meshes for

(multi)physics simulations

French Geological Referential Platform (RGF)

improving the efficiency of model production and developing new modeling techniques

o multi-scale models, fault networks, anisotropies, integration of LIDAR/million points acquisitions…

o dealing with geological uncertainties

pushing for the standardization of geological concepts and data exchangeo BRGM is co-chairing the joint OGC / CGI-IUGS GeoScience DWGo promote and implement those standards in several collaborative projects


TOWARDS FULLY INTEGRATED GEO-PHYSICAL MODELS

from 3D geological modelsto hydrothermal models

Baie du Lamentin (Martinique)

the most efficient way to mitigate the geological risk is the collaborative integration of multidisciplinary data and interpretations into models of the subsurface the challenge is to have a two-way integration: physical simulations ran on geological

models and geological models validated/modified from the output of physical simulations


exploration scaledetailed regional geology : intrusive, metamorphic units, deformations, folds, faults, dykes networks…integration of gravity, magnetism,geological mapping, geochemistry…

identify geometries and favourable host rocks

prospect scaledelineate mineralized envelops, alteration, dykes , faults...select geophysical methods depending on alteration type and mineralogyintegration of drilling, geochemical anomalies, core analysis, grades…

resource assessment

belt scalearchitecture of crustal domainscrustal shear zones, lithospheric slab, heat/fluid transfer pathways, physical properties (density, magnetism, heat, seismic velocities)

understanding metallogenicprocesses and ore distribution

EXPLORATION – MINERAL RESOURCE – PREDICTIVITY


Geomodel BIM project

BIM project

BIM project

providing subsurface knowledge to BIM…

enhancing geomodelling from BIM data…

http://www.minnd.fr/en/

GeoScienceDWG

integrated city model

URBAN GEOLOGY: THE MEETING OF TWO COMMUNITIES

geomodelling helps building sustainable infrastructures and smart cities…

… construction projects enables to get geoscientific knowledge

We need Geomodelling / Building Information Modelling interoperability !


FRENCH GEOLOGICAL REFERENTIAL PLATFORM

a scientific and technological challengeto develop a 3D description of the geological bodies that make up the subsurface and to understand the mechanisms that govern their evolution over time

a 3D Information Systemto provide a continuous, homogeneous and coherent coverage of the geological knowledge in three dimensionsto anticipate and respond to new demands from society that involve the subsurface(e.g. energy, risks, resources, urbanization and pollution…)


FRENCH GEOLOGICAL REFERENTIAL PLATFORMRegional projects corresponding to geological objects Vosges – Rhine graben – 2013 demonstrator Pyrenees – final conference in spring 2019

2018-… French Alps

within the frame of the european AlpArrayprogram, lithosphere to the surface and applied geology

Paris basinfocus on the high resolution 3D management of the geological subsoil


crustal structures and seismicityArgentin 2015

highlighted thinned lower crust domains and European mantle upwellingconstrain the rifting/convergence mechanisms during the Pyrenean orogeny

Wang et al 2016

observed gravimetry computed from model

mantle upwelling

UNVEIL THE CRUSTAL AND LITHOSPHERIC STRUCTURES OF THE PYRENEAN BELT

joint Monte Carlo litho-gravimetric-seismic tomography inversion 3D Imagery of density and velocity.

Wehr 2017


3D GEOLOGICAL MODELS TO ASSESS AND PROTECT KARSTIC HYDROGEOLOGICAL RESOURCES

collect data and build a consistent database new acquisitions in uncertain areas: structural fieldwork,

gravimetry, exploration drillings… select significant geological units build a 3D geological model inform the geological model with petrophysical

properties build a 3D hydrogeological model

assess and protectthe hydrogeological resource

of the Plateau de Sault area(Eastern Pyrenees)

Martel et al. 2015 Monod et al. 2016


3D GEOLOGICAL MODELS TO UNDERSTAND AND PREDICT HYDROTHERMAL RESOURCE

Taillefer 2017

thermal springs along the Têt fault zone(Eastern Pyrenean foothills)

fieldwork to characterize the system 3D geological model of the main structures unstructured mesh generation hydrothermal modeling (mass and heat transfer)


3D GEOLOGICAL MODELS TO UNDERSTAND AND PREDICT HYDROTHERMAL RESOURCE

model predicts correctly the location and temperature of the

4 main thermal springs

topography exerts a dominant control on the deep flow pathways and fault zones act as main heat collectors

HAVE A FRUITFULWORKSHOP!

4TH MEETING OF THE EUROPEAN 3D GEOMODELLING COMMUNITY

Orléans - FranceFebruary 2018, 21-23

delivering subsurface modelsfor societal challenges

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4 MEETING OF THE EUROPEAN 3D GEOMODELLING COMMUNITY · French Geological Referential Platform (RGF) improving the efficiency of model production and developing new modeling techniques