Geological tools and methods for engineers

This module introduces the various classical and modern tools and methods for analyzing sedimentary systems at different scales. The aim is to learn how to analyze, understand and predict the structure of geological layers and the geometry of sedimentary bodies in outcrop and in the subsurface.
The notion of analogy is first explained: using geological outcrop data to better interpret subsurface data, notably through the use and interpretation of digital outcrop models with software such as VRGS. The basic concepts of "sequence stratigraphy", a method for reconstructing the 3D geometry of sedimentary bodies at different scales, are then presented. At the same time, methods for interpreting seismic reflection data, such as well wedging, seismic stratigraphy, clinoform analysis and seismic geomorphology, are taught to complete the understanding and visualization of geological structures and objects in 2 and 3 dimensions, from basin to reservoir scale.
Analysis and understanding of the stratigraphic architecture (layer geometry and facies distribution) of sedimentary series will enable modeling and prediction of fluid transfer in the subsurface (geological modeling module in 3rd year).
Numerous tutorials are designed to put these lessons into practice, and to help students understand their areas of application: natural resources, groundwater, underground storage, natural hazards, development, etc.
Skills to be acquired:
- Identify a sedimentological log based on core analysis
- Understand the basics of acquisition and the applications of digital outcrop models (resources, natural hazards, storage, etc.)
- Interpret digital outcrop models using software: dressing in facies, measuring thicknesses, surfaces, dips, etc.
- Reconstruct the architecture of sedimentary bodies (reservoirs and impermeables) from stratigraphic correlations
- Understand the dynamics and evolution of sedimentary systems
- Understand the role of the main natural factors responsible for the nature and geometry of deposits: tectonics, eustatic variations and sedimentary production, etc.
- Interpret seismic data (2D and 3D) at both stratigraphic and structural levels
- Generate and analyze a synthetic seismic model
- Use seismic interpretation and modeling software
- Integrate all these methods for analyzing outcrop and subsurface data to reconstruct the geometry of sedimentary bodies at different scales.

Basics of geology and sedimentology, notions of sequence stratigraphy Introduction to geophysical methods

Sedimentary toolbox: from core to virtual outcrop (R. Bourillot and S. Leleu)


Sequence stratigraphy (P. Razin)


Seismic interpretation (C. Grélaud)