geothermal energy

This study investigates the thermo-hydraulic implications of three geologic scenarios for characterizing the geothermal hydrology of Basse-Terre Island, Guadeloupe. Despite newly acquired magnetotelluric, petrophysical, and geologic data, flow patterns and heat sources have remained elusive. Our simulations were performed in 2D, on a cross section going from La Soufrière volcano in the south to the operating Bouillante geothermal field near the west coast. Simulation results are compared to geologic constraints such as the temperature profile measured at Bouillante and the timing of volcanic activity in the area, which may be indicative of new heat sources at depth. The simulations indicate that during lateral flow from La Soufrière, geothermal fluids would cool too much to explain the temperature at Bouillante. Two other scenarios were found to explain the current thermal structure of the Bouillante geothermal system: a young (ca.  5000 years) and more local magmatic intrusion at depth, or vertical corridors of enhanced permeability that tap hot and porous formations at a few km depth. Without further geologic evidence, neither of these two scenarios can be preferred. The second magma chamber scenario would indicate a more complex magmatic history of the island than previously established. The study shows that geologically constrained scenarios of regional geothermal hydrology can be meaningfully tested with current numerical simulation techniques, providing further insights for geothermal exploration.

2020 cmp picture

 

The paper presents an algorithm to generate sphere packing. Produced packing honors complex geological structural and stratigraphic discontinuities. We demonstrated the ability of the method to create adaptive particle radii in order to reduce the global number of sphere while keeping a precise description of small geological heterogeneities. Packings have been validated both using classical statistical metrics from the literature and solving uniaxial and triaxial mechanical simulations with Discrete Element Methods.

2019Clausolles Image Pub

In this paper, published in Interpretation, we present an implicit method to automatically generate several possible models of salt top surfaces with varying geometries and topologies. This method can be conditioned to available data such as well markers and seismic picks.

The paper can be download freely here : https://hal.univ-lorraine.fr/hal-02331647/document

Clausolles, N., Collon, P., & Caumon, G. (2019). Generating variable shapes of salt geobodies from seismic images and prior geological knowledge. Interpretation, 7(4), T829–T841. https://doi.org/10.1190/INT-2019-0032.1

Resume graphique

In this paper, published in Hydromettalurgy, we investigate indirect in-situ bioleaching as an alternative mining technology for minimizing waste production, environmental impact, and chemical consumption. Laboratory column experiments are described and their results are used to develop a one-dimensional reactive transport model based on PhreeqC software. This model is then adapted to in-situ conditions by considering the preferential flow of fluids through natural or artificial fractures of enhanced hydraulic conductivity.

A free download of the paper would be available here in January 2020 : https://hal.univ-lorraine.fr/hal-02191211

Laurent, G., Izart, C., Lechenard, B., Golfier, F., Marion, P., Collon, P., … Filippov, L. (2019). Numerical modelling of column experiments to investigate in-situ bioleaching as an alternative mining technology. Hydrometallurgy, 188, 272–290. https://doi.org/10.1016/j.hydromet.2019.07.002

LinkedIn OMMADE

 

In this paper published in Computers & Geosciences, we present OM-MADE, an open-source solution to help a first analysis and simulation of long tail multi-peaked Breakthrough curves observed in karstic systems. OM-MADE (One-dimensional Model for Multiple Advection, Dispersion, and storage in Exchanging zones) is an open-source Python code available on the Github platform : https://github.com/OM-MADE/OM-MADE . The capacities of the software to combine dual-advective-dispersive flow and interaction with immobile water along a flow path discretized into several reaches is demonstrated on the Furfooz area (Belgium).

The complete paper can be found here for free download : https://hal.univ-lorraine.fr/hal-02070868/document.

If you use it, please refer to the paper :

Tinet A.J., Collon P., Philippe C., Dewaide L., Hallet V. (2019). OM-MADE: An open-source program to simulate one-dimensional solute transport in multiple exchanging conduits and storage zones. Computers & Geosciences, 127, 23–35.

Geological Objects and Physical Parameter Fields in the Subsurface: A Review

This open-access paper reviews some practical and theoretical frameworks which exist to translate geological concepts into three-dimensional models. The bottomline is that geological parameterizations of subsurface objects offer new ways to quantify subsurface uncertainties and to reduce it. The links between model topology, geometry and properties are also discussed.

 

Graphical Abstract

 

Laurent 2016 epsl
We are please to announce our new publication in Earth and Planetary Science Letters.
Download the paper here (free access until the 21st of December)!

LinkedIn Rongier2017MarineP

In this new paper published in Marine and Petroleum Geology (i) we propose a geometrical and descriptive approach to stochastically control the channel stacking patterns; (ii) we demonstrate trhrough quantitative metrics that this method makes it possible to control the connectivity between the channels by adjusting the geometry of the migrating areas.

The complete paper can be found here for free download.

Rongier G., Collon P., Renard P. (2017). A geostatistical approach to the simulation of stacked channels. Marine and Petroleum Geology, 82, 318–335. DOI: 10.1016/j.marpetgeo.2017.01.027

On June 8th 2017, Benjamin P. Chauvin defended his Ph.D. entitled "Applicability of mechanics-based restoration: boundary conditions, fault network and comparison with a geometrical method".

Congratulations Dr. Chauvin!

 

annotated seq resto light

Uncertainty management in stratigraphic well correlation and stratigraphic architectures: A training-based method

EdwardsEtAl CAGEO2017

This paper, published in Computers & Geosciences, proposes a new way to sample stratigraphic layering uncertainty by generating possible correlation lines between boreholes.

ImageWeb ParquerPaper

In this paper published in Mathematical Geosciences, we propose to reconstruct channelized systems with a stochastic inverse simulation that reproduces the reverse migration of the system. Starting from the last channel path, which is often the one that is brought out on seismic data, the method builds step by step possible past trajectories. As abandoned meanders provide clues about the paleo-locations of the river, they are also integrated time step by time step during the reverse simulation process. An application is provided on a satellite image of a fluvial system.

The complete paper can be found here for free download.

Parquer M.N., Collon P., Caumon G. (2017). Reconstruction of Channelized Systems Through a Conditioned Reverse Migration Method. Mathematical Geosciences, 49(8), 965–994. DOI: 10.1007/s11004-017-9700-3

Validating novel boundary conditions for 3D mechanics-based restoration: an extensional sandbox model example

This paper discusses boundary conditions to be applied for appropriate geomechanical restoration. We use an analog lab model for confronting numerical restoration results and the "ground truth".
This work was performed during the PhD research of Benjamin P. Chauvin in collaboration with Harvard and Chevron.

The complete paper can be found here for free download.

annotated seq resto light

 

We are pleased to announce a mini-workshop on geology and meshing, April 1st, 2016.Slice in a 3D mesh of the Corbieres model

New numerical schemes to simulate hydrodynamic, geomechanical and seismological processes have a great potential to handle geometrically complex geological features. Unlocking this potential calls for appropriate meshing algorithms which can adapt to geological heterogeneities while meeting numerical requirements. On the occasion of the PhD defense of Arnaud Botella, this workshop will provide opportunities to discuss about recent advances, trends and challenges in this field. 

You can now watch the PhD defense and the Q&A (in French) of Arnaud Botella