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!