Petroleum System, Seismics and Exploration Management

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Synthesis

1 – Introduction : Is there still a future for exploration ?World statistics about reserves, production and consumption, the peak oil question, future projections, impact of unconventional oil ¿.

2 -The Petroleum System :
Definitions of elements and processes of the Petroleum System

Source rocks :
Definitions and characteristics
Source rocks through geological times
Maturation: maturity evaluation techniques
Migration: the Petroleum System efficiency
Fluids:
Oil and gas characterization and classifications
Oil to oil and source rock correlations from biomarkers and isotopes
Fluid alterations: biodegradation, cracking, H2S
Reservoir:
Characteristics
Sandstone depositional environments, fields examples
Carbonate depositional environment, field examples
Reservoir diagenesis
Traps:
Classifications
Structural traps
Stratigraphic traps
Mixed traps
Salt tectonics
Conclusions and recommendations for petroleum system studies.

3 – The main tool: Reflection Seismics

Principles:
Rock physics, velocities and acoustic impedance, influence of lithology and fluids, frequencies and resolution, P &S waves
Acquisition:
Offshore and onshore, sources and arrays, records
Short movies : Seismic surveys in Yemen and Mauritania
Processing:
Processing sequence before and after stack, deconvolution, multiples, CDP, velocity analysis, stack,
migration, 2D v 3D, PSTM, PSDM
Practical exercise of migration
Interpretation:
Objectives : geometry, lithology and fluid content
Morphological picking
Facies Analysis
Limits and Constraints
Images and attributes
Mapping
Synthesis
New developments and applications:
Acquisition: High Resolution, Long Offset, Seabed, PS
Processing: PSDM, Inversion, AVO
Interpretation: DHIs
Drilling: Site Surveys, Borehole Seismics, Pressure prognosis
Production : 4D Seismics, Wide and Multi Azimuth 3D Survey

4 – Exploration management
Petroleum basin and prospect quantitative evaluation and risks
The exploration process:
-Hunting ground’ selection
Property acquisition, E & P contracts
Exploration programmes

5 – Practical exercise: oil charging, quantitative evaluation of an oil prospect

6 – Conclusions: the future of oil and gas exploration

7 – Quiz control based on 2 multiple choice questions

8 – For information: geoscientists careers and recruitment at Total

Language

Français & Anglais

Audience type

-Students, at a BSC level in geology and geophysics, with no previous petroleum geology experience. Assuming a general geological/geophysical background, this course can provide an interesting introduction to the oil & gas exploration and petroleum geology. -Students with already a petroleum geology background; this course will complement their academic university courses, by showing industry applications and recent examples from professionals. -Students, at a Master level, in reservoir engineering, with a comprehensive background in geology/seismic, who should benefit from an introduction to the principles of petroleum geology and exploration. In their future professional lives, they will work with explorationists. It will help them to understand the explorationists’ ways of thinking and working, for a better work collaboration.

Planned duration

A 5 days course, including practical exercises

Support material

Power Point slides in English only, For course in English: A good understanding of English (if possible TOEFL/TOEIC level) is required to profitably attend and really take benefit of this course.