Antoine Armandine Les Landes

• PhD
• Engineer at Geological and Mining Research Bureau

Evolution of the pressure at the intersection of the three-fault system before the earthquake of 11 november 2019 at Le Teil (France)

Seismic hazard assessment in stable continental regions (“intraplate domain”) involves specific difficulties, due to the lower recurrence of events compared to active zones, and to the fact that the triggering processes are particularly complex and still poorly understood. Several recent studies emphasize the role of local processes such as erosion...

Evolution of the pressure at the intersection of the three-fault system before the earthquake of 11 november 2019 at Le Teil (France)

On 11 November 2019, the Le Teil Mw4.9 earthquake occurred in southeast France, in the vicinity of a surface quarry. We focus this work on the effect of hydraulic recharge linked to the infiltration of meteoric water in the fault zones in the period preceding the earthquake. In the reference simulation, we used the in situ soil moisture at 30 cm de...

The 4.9 Mw earthquake of 11 November 2019 at Le Teil (France) occurred at a very shallow depth (about 1 km), inducing the surface rupture of La Rouvière fault. The question was raised shortly after about the potential impact of a nearby surface quarry. Thanks to satellite differential interferometry, here, we revealed the existence of a secondary s...

The metamodel-based approach (also referred to as the surrogate approach) is commonly applied to overcome the computational burden of numerical models that are used to simulate the evolution of reservoir fluids and pressures in response to any production scheme. In this study, we propose an adaptation of this approach for aquifer thermal energy sto...

The Mw 4.9 earthquake of 11 November 2019 at Le Teil (France) occurred at a very shallow depth (about 1 km) inducing the surface rupture of La Rouvière fault, nearby of a limestone quarry. Thanks to satellite differential interferometry, we detected the existence of the secondary surface rupture of the quasi-parallel Bayne Rocherenard fault. A newl...

In order to assess the thermo-hydraulic modelling capabilities of various geothermal simulators, a comparative test suite was created, consisting of a set of cases designed with conditions relevant to the low-enthalpy range of geothermal operations within the European HEATSTORE research project. In an effort to increase confidence in the usage of e...

This paper focuses on the numerical simulation of geothermal systems in complex geological settings. The physical model is based on two-phase Darcy flows coupling the mass conservation of the water component with the energy conservation and the liquid vapor thermodynamical equilibrium. The discretization exploits the flexibility of unstructured mes...

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To be exploited, geothermal resources require heat, fluid, and permeability. These favourable geothermal conditions are strongly linked to the specific geodynamic context and the main physical transport processes, notably stresses and fluid circulations, which impact heat-driving processes. The physical conditions favouring the setup of geothermal...

In geothermal exploration, the potential to locate thermal anomalies is compromised in some “blind” geological contexts (lack of thermal information at depth and of surface manifestations). We propose an approach to help locating thermal anomalies based on a groundwater flow model and a geomechanical model. The approach incorporates a thorough stru...

Fault zone have a high potential for geothermal energy extraction. But their usability is highly conditioned by their productivity potential which must be estimated prior to drilling. The hydraulic behavior of the reservoir can be investigated through numerical simulations based on conceptual models of fault zone. DFN depicting the internal fault z...

ERE3.4 - Conventional and unconventional geothermal resources: Advances in integrated approaches for exploration and monitoring

Climate change is thought to have major effects on groundwater resources. There is however a limited knowledge of the impacts of past climate changes such as warm or glacial periods on groundwater although marine or glacial fluids may have circulated in basements during these periods. Geochemical investigations of groundwater at shallow depth (80-4...

Saline fluids with moderate concentrations have been sampled and reported in the Armorican basement at the regional scale (northwestern France). The horizontal and vertical distributions of high chloride concentrations (60-1400mg/L) at the regional scale support the marine origin and provide constraints on the age of these saline fluids. The curren...

Saline fluids with moderate concentrations have been sampled and reported in the Armorican basement at the regional scale (northwestern France). The horizontal and vertical distributions of high chloride concentrations (60-1400mg/L) at the regional scale support the marine origin and provide constraints on the age of these saline fluids. The curren...

http://www.theses.fr/2014REN1S101 Groundwater resources represent approximately 98% of global freshwater resources available for humans on our planet; therefore groundwater is a fundamental resource for our societies. Due to climate change and the strong link between climate and water cycle and so groundwater resources, an understandable concern h...

Groundwater resources represent approximately 98% of global freshwater resources available for humans on our planet; therefore groundwater is fundamental resource of our societies. Due to climate change and strong link between climate and the cycle of water, an understandable concern is appeared about the potential impacts of climate change on wate...

In recent decades, saline fluids have been sampled worldwide at great depths in continental basements. Although some of them have been attributed to marine transgressions, the mechanisms allowing their circulation are not understood. In this paper, we describe the horizontal and vertical distributions of moderately saline fluids (60 to 1400 mg L−1)...

Peatlands are complex ecosystems driven by many physical, chemical, and biological processes. Peat soils have a significant impact on water quality, ecosystem productivity and greenhouse gas emissions. However, the extent of peatlands is decreasing across the world, mainly because of anthropogenic activities such as drainage for agriculture or grou...

Saline fluids at shallow depth (50 – 450 m) in the Armorican basement were investigated. Fluids with salinities ranging from 80 to 900 mg/L mix with modern shallow groundwaters containing anthropogenic solutes. The most saline fluids are deeper or more isolated from mixing. These fluids reveal Br/Cl and SO4/Cl ratios that are typically marine. This...

In recent decades, saline fluids have been sampled worldwide at great depths in continental basements. Although some of them have been attributed to marine transgressions, the mechanisms allowing their circulation are not understood. In this paper, we describe the horizontal and vertical distributions of moderately saline fluids (60 to 1400 mg L−1)...