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| GEOL0229-1 | Oil geology
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| Duration : | 15h Th, 15h Pr |
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| Credits/ECTS : |
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| Holder(s) : | Pierre cornet |
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| Language : | Langue française |
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| Course contents : | The course begins with a review of production and distribution of known world reserves of oil and gas, their use, and perspectives for the future. Next, we proceed to a description of the composition and geological creation of hydrocarbons, the geological conditions necessary for their maturation and accumulation in the form of underground fields of oil and gas (petroleum systems). Then the course will review techniques of exploration: geophysical methods, analysis of data from wells, definitions of prospecting and evaluation of reserves. A brief review of drilling procedures and methods of bringing fields into production concludes the course.
Class work: exercises using paper documents: seismic lines, recordings of wells and various maps from actual fields. These are interpreted in quantitative terms under supervision of the instructor, and then student work is corrected working as a group. The next part of the course involves the identification of zones of interest, identification of prospects, and the evaluation of the volume of hydrocarbons expected to be produced. |
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| Course objective : | Training in the conditions of genesis and accumulation of hydrocarbons and oil exploration techniques. |
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| Prerequisites : | General geology: concepts of structural, sedimentology, geochemistry and geophysics. |
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| Organization : | The course consists of 15 hours of theory and 15 hours of practical work in the following order:
1. Introduction (1 session): global statistics on reserves, production and consumption; energy market: refining, petrochemicals, alternative energies. Practical work: personal Internet research.
2. Petroleum system (1 session): general information on parent rocks, reservoirs and blankets and their combination in a potential trap. Main types of traps. Practical work: personal Internet research.
3. Study of petroleum basins (2 sessions): identification of areas of interest, creating petroleum maps. Characteristics of a petroleum basin: limits and depth, sedimentary fill (stratigraphy, deposit environments), structural evolution. Practical work: regional evaluation of a petroleum basin on the basis of various maps and stratiographic columns; identification of objectives and research into areas of interest (2 hours).
4. Interpretation of drilling data (2 sessions): technical bases, principles and interpretation of logs; sample analysis; identification of elements of petroleum systems, correlations and stratigraphic interpretation. Practical work: interpretation of logs (2 hours).
5. Geophysics (3 sessions): gravimetric and magnetometric analysis; theoretical bases of acquisition and seismic processing, principles of analysis (referenced and cartography) and examples of different structural contexts in sections. Practical work: oil well parametering, interpretation and plotting on maps; identification of areas of potential oil interest (4 hours).
6. Geochemistry and characterisation of parent rocks (2 sessions): organic composition and types of parent rocks; maturation, generation and expulsion of hydrocarbons; methods of characterisation: various analyses; definition of "kitchens" and calculation of oil potential. Practical work: interpretation of geochemical "logs", creating a maturity map and identifying "kitchens" (2 hours).
7. Reservoirs and blankets (2 sessions): physical characteristics of reservoirs and measures of porosity, permeability, saturation...; diagenesis and burying; revision of tectonic-sedimentary environments likely to create reservoirs, zonation and geometry, terrain examples; paleogeographic distribution. Vertical blankets and lateral watertightness. Practical work: analysis of thin sections, examples using core samples, interpretation and correlation of logs (3 hours).
8. Prospectivity (1 session): definition of oil-interest zones, identification of "leads" and prospects, volumetric calculation of accumulations and potential reserves; risk evaluation. Concepts of economicity, acquiring a license, types of contracts. Practical work: creating geopetroleum maps, definition and evaluation of prospects (2 hours).
9. Drilling and production techniques (1 hour): principles of rotary drilling, geological checks, logging and tests; types of equipment and water depth; development principles. |
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| Written notes : | Selection of lecture documents and articles. |
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| Assessment : | Oral examination on understanding of the course, on the basis of documents distributed, including preparation time. The basis of the examination may also consist of personal bibliographical research, defined in advance by the student. |
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| Contacts : | Pierre Cornet, TOTALFINAELF, Exploration et Production, DGEP/GSR/PN/GEOL, 2 place de la Coupole - La Défense 6, 92078 Paris La Défense Cedex - France ; phone : x 33 (0)1 47 44 36 92 ; e-mail : pierre.cornet@totalfinaelf.com |
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