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Description of Individual Course Units

Course Unit Code Course Unit Title Type Of Course D U L ECTS GPE 5135 RAY TRACING SEICMIC MODELLING METHODS ELECTIVE 2 2 0 7

Offered By

Graduate School of Natural and Applied Sciences

Level of Course Unit

Third Cycle Programmes (Doctorate Degree)

Course Coordinator

PROFESSOR DOCTOR GÜNAY ÇIFCI

Offered to

GEOPHYSICAL ENGINEERING

Course Objective

The goals of this course are to help to seismic interpretation and determine ray paths between points in the earth and to compute the traveltimes along these paths. Given a two- or three-dimensional model of the earth and the configuration of seismic sources and receivers, ray-tracing can provide sufficent information to approximate the results of a seismic experiment.

Learning Outcomes of the Course Unit

1   Raytracing has played large applications in the solution of both direct and inverse seismological problems of lateraly varying 2 or 3D layered media, 2   So this course can play a very important role on many inversion techniques (seismic tomography), 3   Ray-tracing is a flexible approach to seismic modelling. It could be used to many earth models, it is not restricted like finite-element modelling, 4   The raytracing can be used in most of methods to interpret seismic body wave, both in structural seismology and in seismic source studies using the principles of the ray method, 5   to give the students further modelling.

Mode of Delivery

Face -to- Face

Prerequisites and Co-requisites

None

Recomended Optional Programme Components

None

Course Contents

Week Subject Description 1 Kinematic and Dynamic ray tracing, The Advantages of Depth Imaging, 2 Model Building Concepts, 3 Seismic Domains, 4 Building the Initial Model (I) Defining Layer Structure 5 Building the Initial Model (II) Defining Layer Velocity, 6 The Requirements of an Accurate Image, 7 Refining the Model Using the Products of Prestack Depth Migration - The Depth Gather, 8 Quiz 9 Pitfalls, Problems and Limitations, 10 3D Considerations, 11 Velocity Model Determination by Tomography of Depth Migrated Gathers, 12 Influence of Seismic Anisotropy on Velocity Analysis and Depth Imaging, 13 Case History 1 Solving the Fault Shadow Problem, 14 Case History 2 - Efficient Development of Velocity Models over Gulf of Mexico Salt Structures and South Calabira Deep Seismic Examples.

Recomended or Required Reading

S.W. Fagin, Seismic Modelling of Geologic Structures: Applications to exploration Problems, Geophysical developments SEG 1992.

Planned Learning Activities and Teaching Methods

The course will be based on the brief theoritical concepts, presentation and exercises format.

Assessment Methods

SORTING NUMBER SHORT CODE LONG CODE FORMULA 1 ASG ASSIGNMENT 2 PAR PARTICIPATION 3 FIN FINAL EXAM 4 FCG FINAL COURSE GRADE ASG * 0.40 +PAR * 0.10 +FIN * 0.50 5 RST RESIT 6 FCGR FINAL COURSE GRADE (RESIT) ASG * 0.40 +PAR * 0.10 + RST * 0.50

Further Notes About Assessment Methods

None

Assessment Criteria

To be announced.

Language of Instruction

Turkish

Course Policies and Rules

To be announced.

Contact Details for the Lecturer(s)

gunay.cifci@deu.edu.tr (232) 3017290 - 278 55 65 /126

Office Hours

Tuesday 10-12, Thursday 10-12

Work Placement(s)

None

Workload Calculation

Activities Number Time (hours) Total Work Load (hours) Tutorials 14 2 28 Lectures 14 3 42 Preparations before/after weekly lectures 14 2 28 Preparing assignments 14 2 28 Preparing presentations 14 2 28 Reading 2 1 2 Preparation for final exam 1 4 4 Quiz etc. 2 1 2 Final 1 2 2 TOTAL WORKLOAD (hours) 164

Contribution of Learning Outcomes to Programme Outcomes

PO/LO PO.1 PO.2 PO.3 PO.4 PO.5 PO.6 PO.7 PO.8 PO.9 PO.10 PO.11 PO.12 PO.13 LO.1 5 4 4 2 5 5 5 3 3 3 4 5 5 LO.2 5 4 5 3 5 4 5 4 3 3 4 3 4 LO.3 5 4 4 3 5 4 5 4 3 4 5 4 5 LO.4 5 5 5 5 5 4 4 4 3 4 5 5 5 LO.5 5 5 5 4 5 4 4 4 3 4 5 4 4