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PPT file
Migration Deconvolution
Applied to Pemex Marine
Seismic Data
Guoan Luo and Sergio Chavez-Perez*
*Mexican Petroleum Institute (IMP)
Feb 3, 2006
Outline
• Objectives
• Migration Deconvolution
• PEMEX Data
• Ongoing and Future Work
Outline
• Objectives
• Migration Deconvolution
• PEMEX Data
• Ongoing and Future Work
Objectives
 Apply MD to a rather
complex marine data set
 Speed MD up and make it
a practical imaging tool
Outline
• Objectives
• Migration Deconvolution
• PEMEX Data
• Ongoing and Future Work
Modeling
Reflectivity
d=Lm
Migration
Migration image
L d = L L m = m mig
T
T
Migration Green’s Function
Г = L L
T
Migration deconvolution
[L L ] L L m = [L L ] mmig
T
-1
T
T
-1
m = [L L ] mmig
T
Deblurring Operator
Г = [L L ]
-1
T
-1
-1
Outline
• Objectives
• Migration Deconvolution
• PEMEX Data
• Ongoing and Future Work
Location Map
N
KAMBUL -1
TUNICH-101
TABAY-1
KANTAAN-1
KAYAB-1 MOAN-1
ZAZIL HA-1
CHACMOOL-1
CEEH-1
YAXILTUN-1 MALOOB-101
KU-405
IB-102
BOTS-1
ZAAP-1
BACAB-1
POK-1 EK-101
SAM-1
LUM-1
EK BALAM-DL3
BALAM-1
AKAL-2001
AKAL-1
C-2011
5 km
NIX-1
TAKIN-1
KUKULKAN-1
TAKIN-101
LOC. HALACH-1
PECH-1
LOC. MANAB-1
LOC. PETEN-1
Mitra et al (2005)
Campeche Bay
Area
LOC.-LAKIN-1
CD. DEL
CARMEN
NUEVO
CAMPECHITO
FRONTERA
TERMINOS LAGUNE
Modified from Rojas et al
Structural Evolution
Mitra et al (2005)
Migrated Section (inline 200)
0
X (km)
25
0
Time (s)
3.6
Migrated Section (inline 400)
0
X (km)
25
0
Time (s)
3.6
Migrated Section (crossline 400)
0
Y (km)
20
0
Time (s)
3.6
Migrated Section (crossline 600)
0
Y (km)
20
0
Time (s)
3.6
Outline
• Objectives
• Migration Deconvolution
• PEMEX Data
• Ongoing and Future Work
Reference Point
25mX25m
X
1001
1250
T
Data Cube Grid
100mX100m
Migration vs MD
Time slice at 1200 ms
0
X (km)
25
0
X (km)
0
Y (km)
20
MIG
MD
25
Migration vs MD
Time slice at 1600 ms
0
X (km)
25
0
X (km)
0
Y (km)
20
MIG
MD
25
Migration vs MD
Time slice at 2400 ms
0
X (km)
25
0
X (km)
0
Y (km)
20
MIG
MD
25
Migration vs MD
0
X (km)
25 0
X (km)
0
Time (s)
3.6
MIG
Inline 200
MD
25
Migration vs MD
0
X (km)
25 0
X (km)
0
Time (s)
3.6
MIG
Inline 400
MD
25
Migration vs MD
0
Y (km)
20 0
Y (km)
0
Time (s)
3.6
MIG
MD
Crossline 400
20
Migration vs MD
0
Y (km)
20 0
Y (km)
0
Time (s)
3.6
MIG
MD
Crossline 600
20
Migration vs MD
0
Y (km)
20 0
Y (km)
0
Time (s)
3.6
MIG
MD
Crossline 200
20
Migration vs MD
0
Y (km)
20 0
Y (km)
0
Time (s)
3.6
MIG
MD
Crossline 800
20
Ongoing Work
Initial 3D Poststack MD tests show
• Improved spatial resolution in time
slices
• Improved structural definition in area of
interest
Future Work
 3D Prestack MD tests
 Improve MD performance for
complex velocity models
 Make it a more practical
imaging tool
Acknowledgements
2005 UTAM Sponsors
PEMEX (Petróleos Mexicanos)

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