COURSE UNIT TITLE

: DATA PROCESSING IN MARINE SEISMIC

DEGREE PROGRAMMES

Description of Individual Course Units

Course Unit Code Course Unit Title Type Of Course D U L ECTS
DJJ 5051 DATA PROCESSING IN MARINE SEISMIC ELECTIVE 3 0 0 8

Offered By

Graduate School of Natural and Applied Sciences

Level of Course Unit

Second Cycle Programmes (Master's Degree)

Course Coordinator

PROFESSOR DERMAN DONDURUR

Offered to

MARINE GEOLOGY AND GEOPHYSICS
MARINE GEOLOGY AND GEOPHYSICS

Course Objective

Multichannel seismic reflection data processing requires some specific data processing methods in a specific order and using appropriate parameters. This course purposes describing all these spesific methods in both theoretical manner and practical applications. Basics aspects are seismic data formats, principles of seismic data processing, Promax software, pre-processing, filtering methods and characteristics, 2D Fourier transform and its applications, deconvolution, CDP concept, velocity analysis, NMO correction and stack, seismic migration.

Learning Outcomes of the Course Unit

1   Principals of Data Processing
2   Pre-processing
3   Frequency Filtering
4   Deconvolution
5   CDP
6   Velocity Analysis
7   NMO Correction and Stack
8   Seismic Migration
9   Multiple reflections and their removal
10   Specific techniques in data processing

Mode of Delivery

Face -to- Face

Prerequisites and Co-requisites

None

Recomended Optional Programme Components

None

Course Contents

Week Subject Description
1 General Characteristics of Marine Seismic Data 1.1. Parameters of Data Collection and Selection 1.2. Data Collection Geometry 1.3. Seismic Data Formats 1.4. Shot Gather and Properties 1.5. Noises In Marine Seismics
2 Principals of Data Processing 2.1. Fourier Transform 2.1.1. Fourier Series 2.2. Special Functions 2.3. Autocorrelation, Crosscorelation, Convolution 2.4. Z Transformation 2.5. Sampling Theorem 2.6. Gates and Gating
3 Pre-processing 3.1. General Marine Seismic Data Processing Flow 3.2. Demultiplex 3.3. Format Transformation and Data Loading 3.4. Geometry Definition 3.5. Data editing 3.6. Gain Applications 3.7. Muting
4 Frequency Filtering 4.1. Digital Filter Types 4.2. Amplitude and Phase Spectrums of Bandpass Filter 4.3. Frequency Folding 4.4. Filter Operator Design In Time and Frequency Domain 4.5. 2B Fourier Transform 4.6. Frequency and Wave Number Concepts 4.7. 2B Frequency Folding 4.8. f-k Dip Filters
5 Deconvolution 5.1. Definition of Deconvolution and The Effects 5.2. 1B Convolution Model and Principle of Superposition 5.3. Statistical and Deterministic Deconvolution 5.4. Deconvolution Prerequisites 5.5. Types of Wavelet and Its Effect to Deconvolution 5.6. Prewhitening 5.7. Autocorrelation
6 Spiking Deconvolution 6.1. Definition of Spiking Deconvolution 6.2. Inverse Filtering 6.3. Inverse Filtering with Least Squares Method 6.4. Optimum Wiener Filters 6.5. Wiener Spiking Deconvolution 6.6. Wiener Form Filters
7 Predictive Deconvolution 7.1. Definition of Predictive Deconvolution 7.2. Operator Length and Its Selection 7.3. Prediction Lag and Its Selection 7.4. Impressing of Multiple Reflections 7.5. Choosing Autocorelation Time Gate 7.6. Bandpass Filter After Deconvolution 7.7. Signature Processing
8 Midterm Exam
9 CDP (Common Depth Point) 9.1. Sort 9.2. Fold 9.3. Common Shot Gather 9.4. CDP Gather 9.5. Common Offset Section 9.6. CDP Stack Section and Zero Offset Approach
10 Velocity Analysis 10.1. Types of Seismic Velocity 10.2. x2-t2 Method 10.3. Constant Velocity Scan 10.4. Constant Velocity Stack 10.5. Supergather Concept and Velocity Spectra 10.6. Horizon Velocity Analysis
11 NMO Correction and Stack 11.1. Reflection Hyperbola, Normal Move Out and Levin s Equation 11.2. NMO Correction 11.3. NMO Stretching 11.4. Stack and Its Effects
12 Introduction to Seismic Migration 12.1. Basic Concepts of Migration 12.2.Exploding Reflector Method 12.3. Effects of Migration 12.4. Introduction to Migration Types
13 Seismic Migration 13.1. Kirchhoff Migration 13.2. Finite Difference Method 13.3. Frequency-Wave Number Migration 13.4. Migration Velocity Analysis
14 Presentation of Projects: Applying all the Seismic data processing Stages on the Seismic lines.

Recomended or Required Reading

Yılmaz, Ö, 1987. Seismic Data Processing, SEG Publications, Tulsa.
Jones, E.J.W., 1999. Marine Geophysics, John Wiley & Sons.
Sheriff R.E. and Geldart L.P., 1995. Exploration Seismology: Second Edition, Cambridge University Pres.
Dondurur, D., 2009. Deniz Sismiğinde Veri Işlem, TMMOB Jeofizik Mühendisleri Odası, 294 sayfa.

Planned Learning Activities and Teaching Methods

Theoretical aspects will be taught by presentations. Applications will be done at Geophysics Lab. of Institute of Marine Sciences and Technology.

Assessment Methods

SORTING NUMBER SHORT CODE LONG CODE FORMULA
1 MTE MIDTERM EXAM
2 ASG ASSIGNMENT
3 FCG FINAL COURSE GRADE MTE * 0.50 + ASG * 0.50


Further Notes About Assessment Methods

None

Assessment Criteria

A midterm exam of 30%, and individual project work of 20% and a final exam of 50%.

Language of Instruction

English

Course Policies and Rules

To be announced.

Contact Details for the Lecturer(s)

Assoc. Prof. Dr. Derman DONDURUR
Deniz Bilimleri ve Teknolojisi Enstitüsü
Inciraltı-Izmir

Office Hours

Tuesday-13:00

Work Placement(s)

None

Workload Calculation

Activities Number Time (hours) Total Work Load (hours)
Tutorials 10 3 30
Lectures 13 3 39
Preparation for final exam 1 24 24
Preparation for midterm exam 1 12 12
Preparing assignments 12 8 96
Midterm 1 3 3
Final 1 3 3
TOTAL WORKLOAD (hours) 207

Contribution of Learning Outcomes to Programme Outcomes

PO/LOPO.1PO.2PO.3PO.4PO.5PO.6PO.7PO.8PO.9PO.10PO.11PO.12PO.13
LO.15141155511555
LO.25141155511555
LO.35141155511555
LO.45141155511555
LO.55151155511555
LO.65151155511555
LO.75151155511555
LO.85151155511555
LO.95151155511555
LO.105151155511555

CONTACT INFORMATION
Dokuz Eylül Üniversitesi Cumhuriyet Bulvarı No: 144 35210 Alsancak / İZMİR
Phone: +90(232) 412 12 12 - Fax: +90 (232) 464 81 35

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