Depth m

1
Raw Seismograms
0
6.0 -6.0
Time (s)
0.8
Four-Layer Sand Channel Model
1.5
0
Depth (m)
-1.5
2100
0
2100
Midpoint (m)
2
Interferometric Seismic Imaging

• Gerard T. Schuster

3
(No Transcript)
4
SELECTIVE HISTORY PASSIVE IMAGING
Validity
NO
YES
YES
YES
Earthquake 1900s
NO
YES/NO
YES
NO
NO
YES
YES
YES
YES/NO
YES
NO?
YES
YES
YES
YES
YES
5
Optical Lens
Optical Lens
Optical Lens
6
Interference Pattern
s
s
Optical Lens
7
(No Transcript)
8
Seismic Ghost Reflection
Ghost
Direct
Find R(x,z) but not know source location
?
9
Seismic Interferogram Correlate Traces
Seismic Ghost Reflection
Ghost
Direct
1
2
M
10
Raw Seismograms
0
0
6.0 -6.0
0.8
0.8
Four-Layer Sand Channel Model
1.5
0
0
-1.5
0
2100
Midpoint (m)
11
Raw Seismograms
0
6.0 -6.0
0.8
Migration Image 1-s Stack
1.5
0
-1.5
0
2100
Midpoint (m)
12
70 Raw Seismograms
0
6.0 -6.0
Time (s)
0.8
Migration Image 50 1-s Stacks
0
1.5
Depth (m)
-1.5
2100
0
2100
Midpoint (m)
13
Geological Model
X (m)
4
0
0
V1
V2
Depth (m)
V3
V4
V5
V6
3
14
Velocity Model (J. Yu)
X(km)
X(km)
0 4
0 4
0
0
3.5
3.5
Depth(km)
2.0
2.0
3
3
Interval Velocity
RMS Velocity
15
Autocorrelogram
Shot Gather
Traces
1 200
0
Time (s)
4
CSG 10
16
Ghost Autocorrelogram Depth Migration
X (km)
1.6
2.1
0
Depth (km)
2.8
With primaryghost
17
Acquisition Survey
East (kft)
0
4.5
0
Drill bit
North (kft)
Well Rig
3C Receivers
-5
0
Depth (kft)
10
18
Raw CGR 96
Proc. CGR 96
1 Trace 10
1 Trace 10
0
Time (s)
7
5-40 Hz
19
Acquisition Survey Map
Well Rig
0
Line AC4
North (ft)
Drill bit
3C Receivers
-5000
0
1500
3000
4500
East (ft)
20
SP
1255
1215
1235
1.0
Drill hole
Time (s)
2.0
3.0
Ghost Autocorrelogram Image(Corr. window8 s)
21
(No Transcript)
22
Free-Surface Multiple
Ghost
Primary
1
2
23
Seismic Interferogram Correlate Traces
Ghost
Primary
1
2
24
Nine-Layered Model (J. Sheng)
Model
Crosscorrelogram image
Distance (km)
Distance (km)
3.0
3.0
0
0
25
Nine-Layered Model
Product Image Kirchcorrel.
Kirchhoff Image
artifacts
Distance (km)
Distance (km)
3.0
3.0
0
0
26
SEG/EAGE Salt Model
0
0.6
1.2
Depth (km)
1.8
2.4
3.0
3.6
0 5.0
10.0 15.0
Distance (km)
27
Crosscorrelogram Image
0
0.6
1.2
Depth (km)
1.8
2.4
3.0
3.6
0 5.0
10.0 15.0
Distance (km)
28
Kirchhoff Image
0
0.6
1.2
Depth (km)
1.8
2.4
3.0
3.6
0 5.0
10.0 15.0
Distance (km)
29
Product Image
0
0.6
1.2
Depth (km)
1.8
2.4
3.0
3.6
0 5.0
10.0 15.0
Distance (km)
30
(No Transcript)
31
Hydro-FracturingUnknown Source
?
?
32
Hydro-FracturingUnknown Source
Master
S
P
P
P
33
70 Ringy 30 Hz Seismograms
0
1.0
Time (s)
0.8
Kirchhoff Migration Image
-1.0
0
1.0
2100 m
Correlogram Migration Image
-1.0
0
1.0
-1.5
2100 m
0
2100
Midpoint (m)
34
Migration Image 1-s Stack
-1.0
6.0
-6.0
1.5
-1.5
Midpoint (m)
35
(No Transcript)
36
Seismic P and PS Transmission
?
37
P and PS Transmission Interferograms
Seismic P and PS Transmission
Master
P
S
S
P
38
Crosswell Model (D. Sheley)
0
Vp /Vs 1.5
5500 m/s
Source 1500 Hz
ds 2 m
Depth (m)
dg 2 m
Well Separation 100 m
5000 m/s
114
114
0
Offset (m)
39
Synthetic Data
40
Conventional PS Transmission Migration
True Velocity
10 Velocity
0
Depth (m)
114
Offset (m)
0
100
Offset (m)
0
100
41
Reduced-Time PS Migration
True Velocity
10 Velocity
0
Depth (m)
114
Offset (m)
0
100
Offset (m)
0
100
42
Comparison 10 Velocity
Conventional PS
Interferometric PS
0
Depth (m)
114
Offset (m)
0
100
Offset (m)
0
100
43
Kidd Creek Crosswell
0
Receiver
Source
Well
Well
20
Depth (m)
40
60
Offset (m)
0
50
44
Data Problems

• Time Delay 3 ms ?
• Well Location
• Velocity Model

45
Time Shifted CRG
0
20
Depth (m)
40
60
0
6
Time (ms)
46
Conventional PS
0
20
Depth (m)
60
Offset (m)
0
50
47
Conventional PS
0
20
Depth (m)
60
Offset (m)
0
50
48
Summary
49
Current Future Work
1. Reduce Coherent Noise and Virtual Multiples
2. Earthquake Rec. Funct. Ghost Imaging
3. Reservoir Monitoring with CDP Data
4. Passive Data Experiment
50
Reduced-Time Migration
Shift Traces by R1 Traveltime
Mitigate Src-Rec Statics
R1
R2
51
Acknowledgements
Thanks for support of UTAM sponsors. Thank J.
Rickett and J. Claerbout for fruitful
discussions.
52
Interference Pattern
Phase Difference
Phase of Rays with Common Path Cancels
53
Outline

• Interferometric Principle Phase Differences

• Passive Seismic Data Ghost Reflection Imaging

• Synthetic Data Results

• CDP Multiple Data Ghost Reflection Imaging

• Synthetic Data Results

• Source Imaging Transmission PS Imaging

• Summary

54
Outline

• Interferometric Principle Phase Differences

• Passive Seismic Data Ghost Reflection Imaging

• Synthetic Data Results

55
Outline

• Interferometric Principle Phase Differences

• Passive Seismic Data Ghost Reflection Imaging

• Synthetic Data Results

• CDP Multiple Data Ghost Reflection Imaging

56
Outline

• Interferometric Principle Phase Differences

• Passive Seismic Data Ghost Reflection Imaging

• Synthetic Data Results

• CDP Multiple Data Ghost Reflection Imaging

• Synthetic Data Results

57
Outline

• Interferometric Principle Phase Differences

• Passive Seismic Data Ghost Reflection Imaging

• Synthetic Data Results

• CDP Multiple Data Ghost Reflection Imaging

• Synthetic Data Results

• Source Imaging Transmission PS Imaging

58

• Interferometric Principle Phase Differences

• F.S. CDP Multiple Migration

F.S. CDP Multiples
?
?
?
59

• Interferometric Principle Phase Differences

• Locating Hydro-Fractures in EOR

F.S. CDP Multiples
?
?
?
?
?
60

• Interferometric Principle Phase Differences

• PS Transmission Migration

F.S. CDP Multiples
?
?
?
?
PS Transmission Migration
?
?
61

• Interferometric Principle Phase Differences

• Passive Seismic Data Ghost Reflection Imaging

?
62

• Interferometric Principle Phase Differences

• Locating Hydro-Fractures in EOR

F.S. CDP Multiples
?
?
?
?
?
63

• Interferometric Principle Phase Differences

• Locating Hydro-Fractures in EOR

F.S. CDP Multiples
?
?
?
?
64

• Interferometric Principle Phase Differences

• PS Transmission Migration

F.S. CDP Multiples
?
?
?
?
?
65

• Interferometric Principle Phase Differences

• PS Transmission Migration

F.S. CDP Multiples
?
?
?
?
PS Transmission Migration
?
?
?
66
Crosscorrelogram RG Migration
G
RG
R
RR
67

• Interferometric Principle Phase Differences

• F.S. CDP Multiple Migration

?
?
68

• Interferometric Principle Phase Differences

• Passive Seismic Data Ghost Reflection Imaging

• F.S. CDP Multiple Migration

F.S. CDP Multiples
?
?
?
?
69
Direct
70
Ghost
Direct
71
70 Raw Seismograms
0
6.0 -6.0
Time (s)
0.8
4-Layer Model
0
1.5
Depth (m)
-1.5
2100
0
2100
Midpoint (m)
72
70 Raw Seismograms
0
6.0 -6.0
Time (s)
0.8
0
1.5
Depth (m)
-1.5
2100
0
2100
Midpoint (m)
73
70 Raw Seismograms
0
6.0 -6.0
Time (s)
0.8
Correlogram Migration Image
0
1.5
Depth (m)
-1.5
2100
0
2100
Midpoint (m)
74
Crosscorrelogram RG Migration
75
Crosscorrelogram RG Migration