3-d migration deconvolution
DESCRIPTION
3-D Migration Deconvolution. Jianhua Yu, University of Utah Gerard T. Schuster, University of Utah. Jianxing Hu, GXT. Bob Estill, Unocal. Outline. Why Do Migration Deconvolution (MD) ?. Migration Deconvolution. Implementation of MD. Examples. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/1.jpg)
3-D Migration Deconvolution3-D Migration Deconvolution
Jianxing Hu, GXTJianxing Hu, GXTBob Estill, Unocal Bob Estill, Unocal
Jianhua Yu, University of UtahJianhua Yu, University of UtahGerard T. Schuster, University of Utah Gerard T. Schuster, University of Utah
![Page 2: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/2.jpg)
Why Do Migration Deconvolution (MD) ?
OutlineOutline
Migration Deconvolution
Examples
Conclusions
Implementation of MD
![Page 3: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/3.jpg)
Why Do Migration Deconvolution (MD) ?
OutlineOutline
Migration Deconvolution
Examples
Conclusions
Implementation of MD
![Page 4: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/4.jpg)
Migration noise and artifacts
Migration Noise ProblemsMigration Noise Problems0
3.5
Dep
th (
km)
Weak illumination
Footprint
![Page 5: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/5.jpg)
Purpose of MD Processing:
Improving spatial resolution
Enhancing illumination
Suppressing migration noise and artifacts
![Page 6: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/6.jpg)
Why Do Migration Deconvolution (MD) ?
OutlineOutline
Migration Deconvolution
Examples
Conclusions
Implementation of MD
![Page 7: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/7.jpg)
M = M = L LTT
Migration:
Migrated imageMigrated image
L RL R
L is modeling operatorL is modeling operator
ReflectivityReflectivity
![Page 8: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/8.jpg)
TTRR = ( = (L LL L ) M ) M
-1-1
3-D PRESTACK MD3-D PRESTACK MD
ReflectivityReflectivity
Design an improved MD filter
Migrated SectionMigrated Section
MD is to eliminate the blurring influence in migration image by designing MD operator
Goal:
![Page 9: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/9.jpg)
Why Do Migration Deconvolution (MD) ?
OutlineOutline
Migration Deconvolution
Examples
Conclusions
Implementation of MD
![Page 10: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/10.jpg)
MD Implementation Steps:MD Implementation Steps:
Step 1: Prepare traveltime table
Velocity cube
Acquisition geometry information
or
Use migration timetable
![Page 11: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/11.jpg)
Calculate the migration Green’s function
MD Implementation Steps:MD Implementation Steps:
Step 2:Y (km)
Dep
th (
km
)
Depth LevelDepth Level ii N
L
![Page 12: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/12.jpg)
Step 4: Invert MD image at the depth Zi by solving linear equations
R
MD Implementation Steps:MD Implementation Steps:
Step 5: Repeat Steps 2-4 until the maximum depth is finished
![Page 13: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/13.jpg)
Why Do Migration Deconvolution (MD) ?
OutlineOutline
Migration Deconvolution
Examples : Synthetic data
Conclusions
Implementation of MD
![Page 14: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/14.jpg)
00
3 km3 km
00
3-D Point Scatterer Model
3 km3 km
11 X 11 Receivers11 X 11 Receivers dxg=dyg=0.3 km
Imaging: dx=dy=50 m
dz=100 m
3X3 Sources; 3X3 Sources; dxshot=dyshot=1.5 km
10 k
m
![Page 15: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/15.jpg)
0
3 X (km)03
Y (km)0
3 X (km)03
Y (km)
0
3 X (km)03
Y (km)
0
3 X (km)03
Y (km)
0
3 X (km)03
Y (km)
0
3 X (km)03
Y (km)
MIG MD
Z=1 km
Z=3 km
Z=5 km
Depth Slices
![Page 16: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/16.jpg)
0
3 X (km)03
Y (km)0
3 X (km)03
Y (km)
0
3 X (km)03
Y (km)
0
3 X (km)03
Y (km)
0
3 X (km)03
Y (km)
0
3 X (km)03
Y (km)
MIG MD
Z=7 km
Z=9 km
Z=10 km
Depth Slices
![Page 17: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/17.jpg)
00
2.5 km2.5 km
00
Meandering Stream Model
2.5 km2.5 km
5 X 1 Sources; 11 X 7 Receivers5 X 1 Sources; 11 X 7 Receivers
3.5
km
![Page 18: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/18.jpg)
MigMig
MDMD
ModelModel
0 Y (km)
X (km
)
2.5
0
2.5
Z=3.5 KM
![Page 19: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/19.jpg)
00
12.2 km12.2 km
00
3-D SEG/EAGE Salt Model
12.2 km12.2 km
9 X5 Sources; 9 X5 Sources; dxshot=dyshot=1 km
201 X 201 Receivers201 X 201 Receivers
Imaging: dx=dy=20 m
![Page 20: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/20.jpg)
3-D SEG/EAGE Salt Model
X (km)Y (km)
Y=7.12 km
![Page 21: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/21.jpg)
Mig and MD ( z=1.4 km, negative polarity)
X (km)3
10
Y (
km
)
5 9.8 5 9.8X (km)
MDMig
![Page 22: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/22.jpg)
MD (z=1.2 km)Mig (z=1.2 km)X (km)
3
10
Y (
km
)
5 9.8 5 9.8X (km)
![Page 23: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/23.jpg)
MD (z=1.2 km)Mig (z=1.2 km)
![Page 24: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/24.jpg)
Why Do Migration Deconvolution (MD) ?
OutlineOutline
Migration Deconvolution
Examples: 2-D field data
Conclusions
Implementation of MD
![Page 25: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/25.jpg)
PS PSTM Image ( by Unocal)PS PSTM Image ( by Unocal)
0 6X (km)
0
8
Tim
e (s
)
![Page 26: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/26.jpg)
0 6X (km)
0
8
Tim
e (s
)
MDMDPSTM(courtesy of Unocal)PSTM(courtesy of Unocal) PSTMDPSTMD
![Page 27: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/27.jpg)
0 6X (km)
3
8
Tim
e (s
)
MDMDPSTM(courtesy of Unocal)PSTM(courtesy of Unocal) PSTMDPSTMD
![Page 28: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/28.jpg)
Why Do Migration Deconvolution (MD) ?
OutlineOutline
Migration Deconvolution
Examples: 3-D field data
Conclusions
Implementation of MD
![Page 29: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/29.jpg)
3-D Land Field Data
: Receivers: Receivers: Sources : Sources
![Page 30: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/30.jpg)
1.6 s1.6 s
Inline
Cro
sslin
e3D PSTM (courtesy of Unocal) MD
![Page 31: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/31.jpg)
2.0 s2.0 s
Cro
ssli
ne
3D PSTM (courtesy of Unocal) MD
![Page 32: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/32.jpg)
3
Mig in Inline (Courtesy of Unocal) MD
![Page 33: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/33.jpg)
Mig
MD
Mig
MD
![Page 34: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/34.jpg)
Mig (Courtesy of Unocal) MDInline Number1 90 1 90
1
300
Cro
sslin
e N
um
ber
Inline Number
(2 kft)
![Page 35: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/35.jpg)
Fault
Fault
![Page 36: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/36.jpg)
(3.6 kft)
Inline Number1 90 1 901
265
Cro
sslin
e N
um
ber
Inline Number
Mig (Courtesy of Unocal) MD
![Page 37: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/37.jpg)
Inline Number1 901.1
7.0
Dep
th (
kft
)
90 Inline Number1
Mig (courtesy of Unocal) MD
(Crossline=50)
![Page 38: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/38.jpg)
(crossline 200)
1 90 1 901.1
8.0
Dep
th (
kft
)Mig (courtesy of Unocal) MD
![Page 39: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/39.jpg)
1 2501.1
7.0
Dep
th (
kft
)Crossline Number
7.01.1
(Inline =50)
Mig (Unocal)
MD
![Page 40: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/40.jpg)
Why Do Migration Deconvolution (MD) ?
OutlineOutline
Migration Deconvolution
Examples
Conclusions
Implementation of MD
![Page 41: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/41.jpg)
ConclusionsConclusions
Aperture width and filter length in designing MD filter are two key parameters
Improve resolution and suppress migration artifacts
MD cost is related with acquisition geometry
![Page 42: 3-D Migration Deconvolution](https://reader034.vdocuments.site/reader034/viewer/2022051402/56815720550346895dc4bc90/html5/thumbnails/42.jpg)
AcknowledgmentsAcknowledgments• Thank Thank Amramco, UnocalAmramco, Unocal, and , and ChevronChevron--
Texaco Texaco for providing the data sets for providing the data sets
• Thank 2002 Thank 2002 UTAM sponsorsUTAM sponsors for their for their financial supportfinancial support
• The help and comments from The help and comments from Alan LeedsAlan Leeds and and George YaoGeorge Yao are very appreciated are very appreciated
• http://utam.gg.utah.eduhttp://utam.gg.utah.edu