Seismic Interpretation and Basin Analysis of Rift Basin Systems
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Seismic Interpretation and Basin Analysis of Rift Basin Systems Course
Introduction:
Rifts represent part of an evolutionary sequence of crustal and upper mantle stretching that leads to normal faulting resulting from the extension. Rift basins, as a distinct geological category, account for only about 5% of the area of basins of the world, however, understanding rift systems helps to unravel a very large portion of the earth’s geology. In addition to rift basins being the foundation of much of the geological history of the earth, they are additionally extremely attractive areas for hydrocarbon accumulations. Despite their relatively small geographical distribution they are known to account for 12% of the known oil reserves.
Course Objectives:
By the end of the training course, participants will be able:
- To understand the earth processes that form rift basins
- To be able to identify and interpret on seismic the main structural features characteristic of rift basins
- To be able to interpret the main stratigraphically phases characteristic of a rift basin
- To have an understanding of how petroleum systems develop in rift basins and also the geographical distribution of the main hydrocarbon plays
- Will have developed a good sense of where to go looking for hydrocarbon traps in rift basins
Who Should Attend?
This training course is suitable for exploration and development geologists, seismic interpreters, sedimentologists, petrographers and other upstream subsurface professionals who are interested in optimally utilizing seismic and geological data in the interpretation of rift basins and for identifying the main hydrocarbon plays.
Course Outlines:
An Introduction to Rift Basins
- Understand what the different basin types are
- Identify the typical features of a rift system
- Develop 3D visualization skills
- Understand how the present is the key to the past. A study of modern rift systems helps to interpret those represented in the geological record
Topics to be covered
- Outline and overview
- Earth processes that lead to the formation of a rift basin
- A modern day rift development – East Africa
- Typical features of a rift basin
- Multiple rifting phases and superposition
- Outcrop geology and the study of rift basins
Tectonic Evolution and the Structural Setting of Rift Basins
- Understand key technical laws and principles
- Identify the main fault styles in rift basins
- Understand the main structural processes that form rift basins
- Identification on seismic of the main hydrocarbon traps that form in rift basins
Topics to be covered
- Crustal stretching models, extension and the development of rift basins
- Identifying the main features of rift basins on seismic
- Fault styles in rift basins and the main hydrocarbon trap types
- Footwall uplift and associated processes
- Hanging wall processes.
- Transtensional overprint and more complex basin development
Identification of Rift Phases and the Stratigraphy of Rift Basins
- Identify key aspects of sedimentary sequences
- Interpret sequences from seismic
- Understand the key controls of basin deposition
- Develop key interpretation skills
- Able to recognize all of the systems tracts and to know where these develop in a typical shelf to basin transect
Topics to be covered
- Pre-rift, syn-rift and post rift development and identification
- Controls on rift basin stratigraphy
- Sequence stratigraphy and seismic sequence stratigraphy in rift basins
- Using integrated well log data to identify different rift phases
- Seismic facies and sedimentary systems in rift basins
- The use of applied biostratigraphy in rift systems for age dating, correlations and Palaeo environmental interpretation
The Development of Petroleum Systems in Rift Basins
- Develop seismic interpretation skills
- Improve 3D visualization skills
- Understand the process of how to explore in a rift basin
- Identify the key hydrocarbon trap types developed in rift basins and also to know where to find them
- Identify good quality hydrocarbon source rocks from well log, seismic and also geological data
- Determine from geological and well data whether source rocks are mature for hydrocarbon generation
Topics to be covered
- Hydrocarbon source rock development and distribution in rift basins
- Migration of hydrocarbons in rift basins
- Reservoir presence and development in rift basins
- Structural, stratigraphic and combination traps where to go looking for oil in rift basins
- The use of seismic attributes to explore in rift basins and the pitfalls
- Seal presence and hydrocarbon seal integrity
- The use of basin modelling in rift basins
Case studies of Rift Basins
- Develop seismic interpretation skills
- Understand how to fully integrate seismic and geological data
- Develop exploration skills in searching for oil and gas in rift basins
- Understand exploration risk in rift basins using real examples
- Understand data challenges for exploration in rift basins using real examples
Topics to be covered
- The distribution of rift basins in the world
- The different types of rift basins marine, lacustrine and aulacogens
- The Gulf of Suez, Egypt
- The sedimentary basins of Libya ages and styles
- The Sirt Basin, Central Libya
