Annick Loschetter

Annick Loschetter
French Geological Survey | BRGM · Georesources Division – Geothermal energy and energy storage Unit

Master of Engineering

About

30
Publications
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123
Citations
Introduction

Publications

Publications (30)
Article
Full-text available
A wider exploitation of deep geothermal reservoir requires the development of Enhanced Geothermal System technology. In this context, drilling and stimulation of high-enthalpy geothermal wells raise technical challenges. Understanding and predicting the rock behavior near a deep geothermal wellbore are decisive to implement stimulation strategies t...
Article
Full-text available
To understand the main properties of cement, a ubiquitous material, a sound description of its chemistry and mineralogy, including its reactivity in aggressive environments and its mechanical properties, is vital. In particular, the porosity distribution and associated sample carbonation, both of which affect cement's properties and durability, sho...
Article
Full-text available
This study presents the results of soil gas concentrations and flux monitoring in an urban area with emphasis on CO2 gas. First goal is to establish if gas hazard may exist at city scale and, if not, to locate areas where the presence of gas emissions is likely to occur. Second objective is to evaluate the ways risk management can be undertaken in...
Article
Full-text available
If a leakage of CO2 out of a geological reservoir were to happen and to reach the vadose zone below a building, CO2 could migrate through the vadose and the building's slab and accumulate in the building, leading to possible acute risk for the inhabitants. A representative-scale experiment, including a prototype for a building, was developed to bet...
Conference Paper
If a leakage of CO2 out of a geological reservoir were to happen and to reach the vadose zone below a building, CO2 could migrate through the vadose and the building’s slab and accumulate in the building, leading to possible acute risk for the inhabitants. A representative-scale experiment, including a prototype for a building, was developed to bet...
Conference Paper
Full-text available
This study presents the results of soil gas concentrations and flux monitoring in an urban area with emphasis on CO2 gas. First goal is to establish if gas hazard may exist at city scale and, if not, to locate areas where the presence of gas emissions is likely to occur. Second objective is to evaluate the ways risk management can be undertaken in...
Article
Earthquake early warning systems (EEWSs) that rapidly trigger risk-reduction actions after a potentially-damaging earthquake is detected are an attractive tool to reduce seismic losses. One brake on their implementation in practice is the difficulty in setting the threshold required to trigger pre-defined actions: set the level too high and the act...
Conference Paper
Full-text available
La présence de CO2 d’origine naturelle magmatique est connue depuis longtemps en Auvergne. Sur l’agglomération de Clermont-Ferrand, des signalements en raison de concentrations anormales de CO2 ont conduit à la réalisation d’une étude dédiée par le BRGM en 2015. Cette étude concerne l’acquisition de nouvelles données de concentration en gaz d’origi...
Article
Estimating the probability of eruption by jointly accounting for different sources of monitoring parameters over time is a key component for volcano risk management. In the present study, we are interested in the transition from a state of low-to-moderate probability value and to the one of high probability value: the latter value generally support...
Article
The performance of Permanent Scatterers PS Interferometry (PSI) analysis is highly limited where the presence of large vegetated cover (agricultural terrains/forests) reduces signal coherence. A possible solution relies on the installation on ground of artificial devices (Corner Reflectors CR) to complement the existing PS network. Yet, the number...
Chapter
Injection of CO2 into deep aquifers may cause surface heave of several millimetres / year. This was revealed by the interferometry analysis of satellite images from the descending orbit (ASAR-sensor of ENVISAT mission) over the period 2003-2009 during CO2 injection at KB-501 well of In Salah (Algeria). These data are of high interest for getting be...
Article
To guarantee the safety of CO2 storage operations, to meet regulatory requirements and thus to be accepted by the public, the operator of a CO2 storage site has to demonstrate that the risks are adequately managed, which includes the treatment of potential irregularities. This paper proposes a methodology to choose a corrective measure and to optim...
Article
Full-text available
This article proposes to test the feasibility of long-term surface deformation monitoring based on synthetic aperture radar (SAR) interferometry on carbon dioxide (CO2) storage sites with land cover representative of potential European injection sites (agricultural or forests with minimum built-up land cover). Because no operational injection site...
Article
CO2 capture and storage is recognized as a promising solution among others to tackle greenhouse gas emissions. This technology requires robust risk assessment and management from the early stages of the project (i.e. during the site selection phase, prior to injection), which is a challenging task due to the high level of aleatory and epistemic unc...
Article
Full-text available
In the present study, we applied two strategies for improving the use of InSAR/PSI techniques for long-term monitoring ground surface deformation induced by CO2 injection areas presenting a large cover of vegetation (agricultural fields, forests, etc.). The first approach relies on advanced processing techniques using the Diffuse-Scatterers-like (D...
Article
Full-text available
Practical implementations of operational earthquake forecasting (OEF) and earthquake early warning (EEW) require a decision (or many decisions) to be made in order to mitigate risk. For example, for OEF a decision may be made to remove hazardous material from an industrial site during a period of heightened seismic hazard to reduce the chance of a...
Article
Methodologies for quantitative risk assessment regarding CO2 storage operations are currently scarce, mostly because of the lack of experience in this field and the relatively significant degree of uncertainty regarding the subsurface intrinsic properties and the processes occurring after the injection starts. This paper presents a practical approa...
Conference Paper
Full-text available
CO2injection for storage activity results in ground surface deformation on long periods (several tens on years). Monitoring the evolution of the phenomenon is then required for risk management purposes. Space-borne InSAR can be regarded as an interesting alternative to ground based geodetic techniques (levelling). However, implementing interferomet...
Conference Paper
Full-text available
This work aims at developing the bases necessary for taking into account in an integrated manner the soil and sub-soil issues in urban development. The diversity of actors and their concerns lead us to develop different tools, with dedicated uses: 1) a multi-actor debate-aid tool based on multi-criteria analysis, that makes more readable the divers...
Article
Full-text available
This work aims at developing the bases necessary for taking into account in an integrated manner the soil and sub-soil issues in urban development. The diversity of actors and of their concerns lead us to develop different tools, with dedicated uses: 1) a multi-actor debate-aid tool based on multi-criteria analysis, that makes more readable the div...
Conference Paper
Full-text available
Amongst the various geological storage options currently under consideration, CO2 storage in coal formations presents the most economic potential for middle-term spreading but also the most uncertainties and technical difficulties. Indeed, the profit from methane recovery could cover part of the costs, but little testing for this technique has been...
Article
Geological storage of the greenhouse gas CO2 has the potential to be a widespread and effective option to mitigate climate change. As any industrial activity, CO2 storage may lead to adverse impact on human health and the environment in the case of unexpected leakage from the reservoir. These potential impacts should be considered in a risk assessm...
Article
Full-text available
CO2 capture and storage is recognized as a promising solution to tackle greenhouse gas emissions. Containment effectiveness of the reservoir is required to ensure harmlessness to humans and to the environment. However, leakage may occur via existing faults, an abandoned well or a sealing deficiency of the cap rock, and impact surface elements. This...

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Archived project