Courses: GEOV113 Seismic Reflection Data: Acquisition and Processing - Autumn 2017

Credits

10.0

Language of Instruction

English

Teaching semester

Autumn

Objectives and Content

The course gives an introduction to seismic exploration, with main focus on the reflection surveying method, and processing of multichannel seismic reflection 2D data. In the "instrumental" part the physical principles of seismic wave propagation are explained, and the modes of operation of the most used instruments are demonstrated. Concepts such as bubble pulse, ghost, directivity, and signal to noise ratio (SNR) are explained. In the "processing part" analog and digital signals are described in time- and frequency domain, and the Fourier transform, sampling in time and space, and aliasing are explained. The central steps in a standard processing sequence are discussed: CMP-sorting, frequency filtering, deconvolution, velocity analysis, mute, stack and migration.

Learning Outcomes

After completing the course GEOV113 the student should know how to:

- explain the standard marine seismic equipment and how it works

- describe the most common methods to damp bubble pulses

- explain how ghost and directivity may influence the seismic picture.

- explain vertical and horizontal resolution

- describe absorption and geometrical spreading

- explain SNR, and describe different forms of seismic noise

- describe seismic multiples and diffractions, and how the effect of such events may be reduced through processing

- describe the main steps in seismic processing from common shot gathers to stacked and migrated data.

Required Previous Knowledge

Basic principles in geophysics, physics of the solid earth, and mathematics

Forms of Assessment

Written, 4 hours

Grading Scale

The grading scale used is A to F. Grade A is the highest passing grade in the grading scale, grade F is a fail.

Contact Information

Student Adviser, Department of Earth Science, E-mail: studiekonsulent@geo.uib.no