IVF Workshop

1

Introduction
2

Acknowledgments
3

Part 1 - Definitions
4

Multi-trace Seismic Attributes
5

Seismic Coherence
6

Coherence
7

Seismic Time Slice through a Salt Dome
8

Coherence Time Slice through a Salt Dome
9

Dip/Azimuth - Definition
10

Dip/Azimuth - Trace
11

Dip/Azimuth Slice through a Salt Dome
12

Part 2 - Seismic coherence
13

Why use seismic coherence?
14

Part 3 - Viewing Coherence
15

Time Slices vs Horizon Slices
16

Methods for obtaining a coherence slice froma 3-D seismic volume

Example
Gulf of Mexico: South Marsh Island
17

Seismic Time Slice
18

Coherence Time Slice
19

Coherence Horizon Slice
Refined interpretation
20

Coherence Horizon Slice
Early interpretation
21

When to use
Time vs horizon slices
22

Part 3 - Examples
23

Complex Faulting
24

Offshore Trinidad
Seismic & Coherence
25

Offshore Trinidad
Coherence & Dip/Azimuth
26

Offshore Trinidad
Seismic
27

Incised Valley System

Red Fork
28

Location map
29

Seismic Cross Section
30

Coherence Slice
31

Spectral Decomposition
32

Stratigraphic well log cross section
33

Interpreted Distribution of Valley Fill Stages
34

Coherence Slice
Wells with faults in Red Fork and Inola intervals
35

Slump feature on edge of Modern-day incised valley
36

Coupled Stratigraphy and Structure

North Sea
37

Coherence & Dip/Azimuth Slice
38

Coherence Time Slices
39

Schematic vertical section
40

Identification of Paleo-depositional Setting

Nigerian Continental Slope
41

Seismic Amplitude & Coherence
42

Coherence
43

Kitimat Submarine Slide
44

Dip/Azimuth
45

Vertical seismic section
46

Coherence
47

Conclusions
48

Caveat!