Numerical simulation and evaluation of passive seismic interferometric methods
for geological gas storage monitoring
Context
This postdoctoral position is part of a collaboration between Grenoble Alpes University
(UGA) and Geolinks, a young company developing innovative methods and applications
in geophysics, particularly in the field of passive seismic techniques.
Description
Ambient Seismic Noise Interferometry (ANSI) is a passive seismic method that has
gained momentum in the last decade for continuous subsurface monitoring in various
geo-industrial contexts, such as geological storage, groundwater management, and
geothermal exploration.
In the context of geological gas storage (e.g., CO2, CH4), the method could be applied to
monitor the extent and evolution of the gas plume and the integrity of overlying strata,
contributing to the comprehensive monitoring strategies for these high-stakes
structures in strategies to reduce the ongoing climate change.
The primary objective of the postdoctoral research is to investigate, through numerical
simulations, the ability of these interferometry methods to detect and locate pressure
and/or saturation changes within a gas storage reservoir, thus quantifying the method’s
sensitivity and resolution for monitoring purposes.
The project includes the following steps:
- Implement a strategy for simulating ambient seismic noise interferometry measurements using 3D wave propagation simulation tools developed by the Seiscope consortium at UGA (SEM46 code).
- Conduct simulations on 4D environments where the spatial and temporal distributions of seismic properties have been pre-defined (via another project).
- Extract synthetic ambient seismic noise interferometry datasets from these simulations.
- Analyze and quantify measurable variations in seismic velocity and attenuation within the synthetic dataset, in collaboration with Geolinks’ research team.
- Evaluate biases associated with heterogeneous distributions of seismic noise sources through additional simulations.
Position Details
- Duration: 18 months
- Location: Grenoble (ISTerre/UGA), with occasional travel to Nantes and Paris.
- Salary (gross) : 51000 euros / year.
Candidate Requirements
- PhD in Earth Sciences or Applied mathematics.
- Geophysics/Seismology expertise: Interpretation of seismic waves.
- Experience with numerical simulation tools.
- Programming skills: Proficiency in Python; knowledge of compiled languages
such as C or Fortran is a plus. - Teamwork: Ability to collaborate effectively with a multidisciplinary team.
Application
To apply to this post-doctoral position, please send your resume and motivation letter to
the following email addresses:
thomas.kremer@geolinkservice.com
romain.brossier@univ-grenoble-alpes.fr
contact@geolinkservice.com