Traitement et inversion sismique

Traitement et inversion sismique
Diplôme d'ingénieur de l'École et observatoire des sciences de la Terre (EOST)Parcours Diplôme d'ingénieur de l'EOST

ComposanteÉcole et observatoire des sciences de la Terre (EOST)

Description

Le cours comprend deux parties :

  • Traitement sismique :
    Méthodes et exemples d'études en imagerie profondeur : migration par équation d'onde (WEM), inversion de formes d'onde (FWI).
    Initiation aux développements récents concernant le traitement des données de sismique réflexion par l'étude et la présentation d'articles publiés dans les journaux de géophysique appliquée sur les sujets suivants : Acquisition - Amplitudes - Anisotropie - Migration - Monitoring - Multiples - Ondes S - Proche surface - Propagation - Puits - Réservoir - Signal - Vitesses.
  • Inversion sismique :
    La prédiction des propriétés des réservoirs pétroliers à partir des données sismique est une des clés du développement et de la gestion des gisements. Dans ce cadre, on décrira les enjeux pratiques et la mise en œuvre de méthodes modernes d’interprétation des données sismiques, en s’appuyant sur des cas d'études réels récents. On illustrera les principes et la mise en œuvre des méthodes de prédiction des propriétés de la matrice (porosité, lithologie, saturation, etc.) et de détection des fractures : inversion post- et pre-stack, AVO, analyse et interprétation des attributs sismiques, méthodes géostatistiques, etc.



The course consists of two parts:

  • - Seismic Processing:

Methods and examples of deep imaging studies: wave equation migration (WEM), waveform inversion (FWI).
Introduction to recent developments in seismic reflection data processing through the study and presentation of articles published in applied geophysics journals on the following topics: Acquisition - Amplitudes - Anisotropy - Migration - Monitoring - Multiples - S-waves - Near surface - Propagation - Wells - Reservoir - Signal - Speeds.

  • - Seismic in version:

Predicting oil reservoir properties from seismic data is a key to reservoir development and management. In this context, we will describe the practical issues and the implementation of modern methods of interpretation of seismic data, based on recent real case studies. We will illustrate the principles and implementation of methods for predicting matrix properties (porosity, lithology, saturation, etc.) and detecting fractures: post- and pre-stack inversion, AVO, analysis and interpretation of seismic attributes, geostatistical methods, etc.
 

School regulations

The curriculum includes three years of study: admissions, the organisation of studies, assessments, placements and vivas, graduation and international exchanges are all explained in the current school rules (pdf).

First and second year courses

First and second year courses

  • General modules: mechanics, geology, mathematics, IT, digital analysis, signal processing, inverse methods.
  • Geophysical methods: physics of the Earth, seismology, seismic modelling and imaging, geodesy, gravimetry, potential methods, geomagnetism, electromagnetism, rock physics and fracture, hydrology.
  • Practical work: geophysical measurements in the field (photo) and in the laboratory, geology field placements in the Alps.
  • Languages and economic and social sciences: English, modern language 2, economics, industrial property, management, sustainable development, ethics, quality, company health and safety
  • IT and research projects, shared with the first year of the master’s degree
  • Summer placements at a laboratory or company, with numerous opportunities abroad (international placement contact: Mike Heap)

Third year course

Students have a choice of 3 specialisations in the third year:

  • Geophysics applied to the exploration and production of raw materials: seismic and hydrodynamic characterisation of reservoirs, seismic processing and interpretation, potential methods.
  • Geophysics applied to geotechnics: geotechnics and the resistance of materials applied in civil engineering, geomechanics, hydrogeophysics, electromagnetic methods, earthquake.
  • Hydrogeology, hydrogeochemistry, hydrogeophysics (HydroG3).

Additional teaching:

  • Languages and economic and social sciences: English, energy economy, company strategy and structure.
  • Geophysics field camp in Alsace (photo).  Here are images of a normal fault in the Rhine Graben taken by students.
  • 6-month industry placement culminating in the writing of a dissertation and a viva before a jury in order to obtain the engineering degree. The placements are carried out all over the world.