Course content
What kinds of Geophysical Data could be used?
Various kinds of geophysical data are available. They are separated into Seismic and Non-Seismic data. Seismic is, without any doubt, the main method used in the oil and gas industry. But Non-Seismic data (gravity, magnetics, electrical, electromagnetics, spectral, etc.) is the main source of information in shallow subsurface applications (engineering, mapping pollution, archaeology). It is also used at the early reconnaissance of hydrocarbon plays and in mapping prospects below salt. However, seismic has its limitations and therefore also non-seismic methods are used successfully as complementary tools in subsurface evaluation. In combination with seismic data, they can significantly reduce the uncertainty of subsurface models as they measure different physical properties of the subsurface. Another important application is in determining the depth to basement.
The Course
The potential of gravity and magnetics will be discussed.
In part 1, various aspects of gravity will be discussed, based on an EAGE publication, such as the Earth gravity field, determining anomalies in the global field, establishing the depth of density anomalies, be it spherical or anticlinal and the resolution, which is limited because of it being a potential field described by a 1ste order differential equation. Most promising is the development of gravity gradiometry, whereby gradients in the gravity field can be directly measured. These are less sensitive to airplane and ship movement.
In part 2, the Earth's magnetic field will be studied. Being due to the internal dipole source, direct interpretation of magnetic (dipole) data is inherently more difficult than (monopole) gravity data. As different causative sources can produce the same surface measurements, non-uniqueness in the interpretation is even more severe than for gravity data. However, promising developments to mitigate these issues will be discussed.
The course
There are two types of courses, one F2F (classroom) and the other virtual using the internet. In both courses Gravity and Magnetic applications will be discussed using lectures and by making many practical exercises. In addition, you will benefit from Moodle facilitating interactions with other participants. In case of the virtual version you can submit your questions in the discussion panel or your solutions of the exercises and receive feedback.
Learning, methods and tools
The course uses a Blended Learning approach based on a user-friendly Learning Management System, called Moodle. In Moodle different modules provide study material, videos, and exercises. The solutions to these exercises can be checked and if the exercise is not clear or the solution cannot be found you can submit your "solution" and ask for feedback. Also, each part contains a quiz which is meant to reinforce the learning. The quiz consists of multiple-choice questions. For each question, all answers can be tried. The idea is that if the answer is not correct, one can go back to the course material to find out what the right answer should be. So, it is not an exam.
Email: j.c.mondt@planet.nl
Website: www.breakawaylearning.nl
Day by day programme
Teamwork will consist of:
Summary/Presentation of learning pointspreviousday
Day 1
09:00-09:30 Biography, Program, Moodle, 52 Things, Teams
09:30-11:30 Geophysical Methods, Gravity JDF I
10:30-11:00 Exercise: Depth Sphere
11:00-11:15 Refreshments
11:15-13:00 Exercise: Depth Anticline
13:00-14:00 Lunch
14:00-14:30 Videos: Gravity
14:30-15:00 Exercise: Gravity Sphere
15:00-15:15 Refreshments
15:15-16:00 Gravity JDF II
16:00-17:00 Exercise: Grav2dc 4D, Swing
17:00-17:30 Quiz 1
17:00-17:30 Team a: Preparation Summary of day 1
Day 2
09:00-09:30 Team a: Summary of day 1
09:30-10:00 Gravity JDF III
10:00-11:00 Exercise: Depth Estimation
11:00-11:15 Refreshments
11:15-13:00 Exercise Olympic, Tapei Tower
13:00-14:00 Lunch
14:00-14:30 Videos: Tokyo Skytree, Gravity Train
14:30-15:30 Exercise: Grav2dc Inv
15:30-15:45 Refreshments
15:45-16:15 Introduction Machine Learning
16:15-17:00 Exercise:Gravity Resolution
17:00-17:30 Quiz 2
17:00-17:30 Team b: Preparation Summary of day 2
Day 3
09:00-09:30 Team b: Summary of day 2
09:30-10:00 Magnetics
09:30-11:30 Exercise: Magnetics
10:30-11:00 Magnetics JDF I
11:00-11:15 Refreshments
11:15-12:00 Exercise: Mag2dc Incl, Mag Anomaly
12:00-13:00 Magnetics JDF III
13:00-14:00 Lunch
14:00-15:00 Videos: The North
15:00-15:30 Grav-Mag Sign
15:30-15:45 Refreshments
15:45-16:15 Exercise: Resolution Basement
16:15-17:00 Seis-Grav-Mag-Grad
17:00-17:30 Quiz 3
17:00-17:30 Team c: Preparation Summary of day 3
Day 4
09:00-09:30 Teamc: Summary of day 3
09:30-10:15 Magnetics JDF IV
10:15-11:00 Exercise: Mag2dc Inv
11:00-11:15 Refreshments
11:15-12:00 Local Magnetics
12:00-13:00 Exercise: Magnetic Latitudes
13:00-14:00 Lunch
14:00-14:30 Videos: Magnetic Dangers, PGK Machine learning
14:30-15:30 Exercise: Grav-Mag
15:30-15:45 Refreshments
15:45-16:00 ML Keras, TensorFlow
16:00-16:30 Exercise: Geomodel Inv
16:30-17:00 Supervised, Unsupervised and Semi-Supervised learning
17:00-17:30 Quiz 4