COURSE UNIT TITLE

: ATTRIBUTES IN MARINE SEISMIC

DEGREE PROGRAMMES

Description of Individual Course Units

Course Unit Code Course Unit Title Type Of Course D U L ECTS
DJJ 5050 ATTRIBUTES IN MARINE SEISMIC ELECTIVE 3 0 0 9

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

Gas accumulations or gas hydrates under the sea floor compose characteristic anomaly zones on seismic data. Applying complex trace attributes and amplitude-offset variations give details about these formations. This course includes determination of gassy sediments and gas hydrates using seismic attributes which observed single-channel and multichannel seismic reflection data and AVO analysis. All analysis methods are discussed theoretically and then severally methods are on trial directly applications on the computer with using Promax software.

Learning Outcomes of the Course Unit

1   General Characteristics of Seismic Data
2   Character of Zero-Offset Reflections
3   DHI
4   Complex Seismic Trace
5   Instantaneous Attributes
6   Characteristic of Angled Reflections
7   AVO Analysis
8   Interpretation of AVO

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 Seismic Data 1.1. Seismic Data Gathers 1.2. Shot Gather 1.3. CDP Gather 1.4. Stack and Its Characteristics 1.5. Data Processing In Marine Seismic
2 Character of Zero-Offset Reflections 2.1. Zero-Offset Reflection 2.2. Zero-Offset Approach with Stack 2.3. Amplitude, Frequency and Phase Characteristics of Seismic Traces that Forming Cross Section Stack
3 Special Geological Structures 3.1. Shallow Gas Bearing Geologic Structures and Their Characteristics 3.2. Gas Hydrate Deposits and Their Characteristics. 3.3. Bright Spots 3.4. Traps and Reefs 3.5. Gas and Gas Hydrate Deposits Effects on the Seismic Data
4 Complex Seismic Trace 4.1. Analytic Signal 4.2. Hilbert Transform 4.3. Types of Seismic Attributes 4.4. Definition and Computing of Complex Trace
5 Computing of Instantaneous Attributes 5.1. Instantaneous Amplitude-Phase-Frequency, Apparent Polarity. 5.2. Average Frequency, Instantaneous Acceleration, Instantaneous Dominant Frequency, Instantaneous q. 5.3. Instantaneous Relative Impedance, Normalized Amplitude 5.4. Envelope Modulated Phase, Envelope Time Derivative, Second Derivative, 5.5. Integration
6 1st midterm Exam
7 Interpretation of Instantaneous Attributes-1 7.1. Gas and Gas Hydrate Bearing Structures Instantaneous Attributes Variations and Interpretation (Instantaneous Amplitude-Phase-Frequency, Apparent Polarity)
8 Interpretation of Instantaneous Attributes-2 8.1. Gas and Gas Hydrate Bearing Structures Instantaneous Attributes Variation and Interpretation (Weighted Mean Frequency, Instantaneous Acceleration, Instantaneous Dominant Frequency, Instantaneous q., Instantaneous Relative Impedance, Normalized Amplitude, Envelope Modulated Phase, Envelope Time Derivative, Second Derivative, Integration
9 Interpretation of Instantaneous Attributes-3 9.1. Application to Single and Multi-Channel Seismic Data of The Central Black Sea
10 Characteristic of Angled Reflections 10.1. Wide-Angle Reflection 10.2. Zoeppritz Equations 10.3. Amplitude Variation (AVO) with Incidence Angle and The Effects
11 2nd Midterm Exam
12 AVO Analysis 12.1. Analysis of AVO A&B 12.2. AVO Velocity Analysis 12.3. Intercept and Gradient 12.4. Intercept (*) Gradient, Intercept (*) Gradient (*) Correlation Coefficient 12.5. Crossover Angle, Sign (Intercept) (*) Gradient, 12.6. Fluid Factor 12.7. Poissons Reflectivity
13 Interpretation of AVO 13.1. AVO Attribute Stacks 13.2. AVO Weighted Stacks 13.3. Vstack and Wstack 13.4. Vstack (-) Wstack, Vstack (/) Wstack, Wstack (/) Vstack, 13.5. AVO Product Indicators 13.6. Classification of AVO Anomalies 13.7. Class I-II-III-IV Sands
14 Presentation of Projects: Instantaneous attributes on the seismic lines which containing accumulation gas and the application of AVO.

Recomended or Required Reading

Yılmaz, Ö, 1987. Seismic Data Processing, SEG Publications, Tulsa.
Castagna, J.P., 1993. Offset-Dependent Reflectivity: Theory and Practice of AVO Analysis, SEG Publications, Tulsa.

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 1 MIDTERM EXAM 1
2 MTE 2 MIDTERM EXAM 2
3 ASG ASSIGNMENT
4 FIN FINAL EXAM
5 FCG FINAL COURSE GRADE MTE 1 + MTE 2 + ASG/3 * 0.60 + FIN * 0.40
6 RST RESIT
7 FCGR FINAL COURSE GRADE (RESIT) MTE 1 + MTE 2 + ASG/3 * 0.60 + RST * 0.40


Further Notes About Assessment Methods

None

Assessment Criteria

Two midterm exams of 20% each, an individual project work of 20% and a final exam of 40%.

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-14:00

Work Placement(s)

None

Workload Calculation

Activities Number Time (hours) Total Work Load (hours)
Lectures 12 3 36
Preparations before/after weekly lectures 12 6 72
Preparation for midterm exam 2 24 48
Preparation for final exam 1 40 40
Preparing presentations 1 12 12
Midterm 2 3 6
Final 1 3 3
TOTAL WORKLOAD (hours) 217

Contribution of Learning Outcomes to Programme Outcomes

PO/LOPO.1PO.2PO.3PO.4PO.5PO.6PO.7PO.8PO.9PO.10PO.11PO.12PO.13
LO.14151154111455
LO.25141143111455
LO.35151132111435
LO.45121123111545
LO.54131142111545
LO.62121122111545
LO.75121123111555
LO.85121122111555

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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