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GL5052: SEISMIC REFLECTION PROCESSING, IMAGING AND QUANTITATIVE INTERPRETATION (2016-2017)

Last modified: 16 Nov 2016 18:05


Course Overview

The student will be trained on the most important essentials of reflection seismics: The theory of seismic waves and their application to data processing both in pre-stack (CMP processing, velocity analysis, stacking, migration) and post-stack environments. Practical exercises involving processing of seismic reflection data will form a significant part of the course with the aim of familiarising students with the key software packages.



Course Details

Study Type Postgraduate Level 5
Session First Sub Session Credit Points 15 credits (7.5 ECTS credits)
Campus None. Sustained Study No
Co-ordinators
  • Dr David Iacopini

What courses & programmes must have been taken before this course?

  • GL Geology And Petroleum Geology (GL) (Studied)
  • Any Postgraduate Programme (Studied)

What other courses must be taken with this course?

None.

What courses cannot be taken with this course?

None.

Are there a limited number of places available?

No

Course Description

I. Pre-stack processing
1. Reformatting seismic data; assigning geometry to seismic trace headers
2. Trace gathering
3. Velocity analysis: NMO stretching, muting, making semblance, coherance maps
4. Comparing semblance maps, picking a semblance map; picking reflection events
5. Normal move-out correction; stacking CMP gathers
6. Editing: Killing and muting traces
7. Testing and applying deconvolution (deterministic and statistical: wavelet amplitude and phase shaping, predictive deconvolution) band pass filtering
8. Residual statics correction, velocity analysis iteration
 9. Multiple suppression (FK, FX, Radon-domian, Tua-p and SRME)
10. Migration: principles, methods (Kirchloff, FD, FK), Post- and pre- stack time and depth migration
11. Forwarding modelling migration: Beam, Gaussian Beam, reverse time migration, anistrophy beam/reverse time migration
12. post-stack time migration
13. challenges of 4D seismic processing
II. Post-stack image processing and quantitative seismic interpretation
1. AVO: model examples, comparison of methods, anistrophy; time-migrated versus depth-migrated seismic suitability for AVO and seismic inversion
2. Pre-conditioning noise cancellation methods; filter (diffusive, edge preserving, dip-azi steering filter, structural oriented filters); semblance, variance and structurally oriented semblances and their uses; complex attributes and their application for mapping seismics; cross-plotting attributes, volume blending, geobodies, building seismic facies models
3. Inversion modelling: comparing deterministic inversion of P, Vp/Vs and probabilistic approaches.

Degree Programmes for which this Course is Prescribed

  • MSc Geophysics

Contact Teaching Time

Sorry, we don't have that information available.

Teaching Breakdown


Assessment

There are in-course exercises for formative feedback. The summative element consists of two exercises totalling 60% of the assessment, and an examination (40%) the exercises are: 1. a workbook recording practical work throughout the whole course (20%), and 2. an assigned exercise (40%). The examination will be by mulitple choice and will be computer marked.

Formative Assessment

None.

Feedback

None.

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