Gravity and Magnetic Methods for Exploration
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Gravity and Magnetic Methods for Exploration Course
Introduction:
Gravity and Magnetic Methods for Exploration is developed to enhance exploration findings through the techniques of gravity and magnetic data analysis. Get to know these methods and how they can be used in an exploration program to map the subsurface 3D geological structure.
This program shall address the role Gravity and Magnetic Methods play in an exploration program, and most importantly when and how to use these methods. The program will cover the theoretical drivers of these methods, including acquisition.
Course Objectives:
- Learn the Application of Gravity and Magnetic Methods
- The training program allows the attendees an appreciation of how the gravity and magnetic exploration methods work (i.e. physics) and what controls the shape and size of anomalies.
- Understand the Acquisition of Exploration Data and Their Anomalies
- The methods of acquisition of exploration data (traditional land, sea and air, with space and tensor methods included) are reviewed together to construct grids and maps of the different anomaly types.
- Gain Insights of the Geology through Advanced Processing
- Attendees will be able to understand how the grids (and profiles) undergo ‘Advanced processing’ in a similar manner to ‘seismic attribute analysis’ to generate derivative maps that allow the position (edges) of sub-surface geological structures to be mapped.
- Overcome Magnetic Interpretation Problems
- Understand the fundamental magnetic interpretation problems that occur close to the magnetic equator and how they can be partly overcome. The derivatives are then used to provide depth estimates to the tops of structures giving a 3D visualization of basement structures under investigation.
Who Should Attend?
This training program is developed and designed for people who are involved in exploration projects, and would like to apply complementary methods that can enhance seismic methods. This program is suitable for Exploration Geophysicists through to Exploration Project Managers needing to make exploration decisions. In order to fully appreciate the course, ideal attendees are geophysicists with at least 2-3 years experiences, or new Exploration Project Managers.
- Exploration Geophysicists
- Exploration Geologists
- Exploration Managers
Course Outlines:
Introduction - Back to Basics
- Introduction And Overview Of Course
- Gravity And Magnetic Responses To 3D Variation In Density And Magnetization Of Rocks
- Gravity Anomaly Types And Responses
- Exercise
Advanced Processing
- What Are Derivatives?
- Amplitude Derivatives
- Phase Derivatives
- Demo: Using GET grid to analysis gravity and magnetic grid data using data from Officer Basin, Australia.
- Exercise
Structural Mapping
- Which Derivatives to Use?
- 2D Lineament Tracking-Automated
- Problems Of Tracking Lineaments At The Equator And
- How To Partly Solve Them
- Exercise
Dept Estimation
- 2D (profile) methods for depth estimation of magnetic sources
- Manual methods
- Werner/Euler/SPI/ methods
- Exercise
- Profile/Grid methods: Euler/SPI
- 3D (grid) methods for Depth estimation for magnetic data
- Exercise
Integrated Interpretation
- Review of the role of the 2D and 3D forward modeling interpretation method
- Integrated 2D and 3D modeling of gravity and magnetic data
- Demo: GMsys 2D gravity and magnetic modeling of Malay basin. The importance of understanding geological processes
- Case Histories : Bolivia, West Africa margin, Cameroon, Sudan
- Wrap-up
