DMO Deconvolution
M. Zhou & Jianxing HuM. Zhou & Jianxing Hu
Geology and Geophysics Department Geology and Geophysics Department University of UtahUniversity of Utah
Progress ReportProgress Report
OutlineOutline ObjectiveObjective• MethodologyMethodology• Numerical ResultsNumerical Results Point Scatterer ModelPoint Scatterer Model
SEG/EAGE overthrust ModelSEG/EAGE overthrust Model
• ConclusionsConclusions
ObjectiveObjective
Eliminate DMO artifactsEliminate DMO artifacts
OutlineOutline
• ObjectiveObjective MethodologyMethodology• Numerical ResultsNumerical Results• ConclusionsConclusions
DMO ProcessDMO Process
(x-h,0)(x-h,0)
DMO SmileDMO Smile
Prestack Prestack migration ellipsemigration ellipse
DMO ellipseDMO ellipse
(x,0)(x,0) (x+h,0)(x+h,0)
t t oror z z
tt
DMO Artifacts In COGDMO Artifacts In COG
Point in Point in DMO (ZO) sectionDMO (ZO) section
DMO ellipseDMO ellipseDMO impusle DMO impusle
responseresponse
DMO artifactsDMO artifacts
DMO Impulse Response FunctionDMO Impulse Response Function
DMO Data = True ZO DMO Data = True ZO ** IRF IRF
True ZO = DMO Data True ZO = DMO Data ** (IRF) (IRF)-1-1
convolutionconvolution**
DMO DeconvolutionDMO Deconvolution
Point in Point in True ZO sectionTrue ZO section
DMO impusle DMO impusle responseresponse
DMO sectionDMO section
(IRF) (IRF) -1-1 = =**
DMO DeconvolutionDMO Deconvolution
Event in Event in DMO (ZO) sectionDMO (ZO) section
DMO SectionDMO Section
Event afterEvent afterDMO DeconvolutionDMO Deconvolution
Deconvolved DMODeconvolved DMOTrue ZO sectionTrue ZO section
DMO DeconDMO Decon
OutlineOutline
• ObjectiveObjective• MethodologyMethodology Numerical ResultsNumerical Results Point Scatterer ModePoint Scatterer Mode SEG/EAGE Overthrust ModelSEG/EAGE Overthrust Model
• ConclusionsConclusions
Point Scatterer ModelPoint Scatterer ModelD
epth
(K
m)
Dep
th (
Km
)X(m)X(m)
00
2.52.5
5.05.0
7.57.5
10.0 10.0
500500 2500250015001500
Constant velocity of 5 Km/sConstant velocity of 5 Km/s
Point Scatterer DataPoint Scatterer Data
00
0.50.5
1.01.0
1.51.5
2.02.0
Tim
e (s
ec)
Tim
e (s
ec)
X(m)X(m)500500 2500250015001500
Synthetic ZO DataSynthetic ZO Data
X(m)X(m)500500 2500250015001500
Stacked DMO DataStacked DMO Data
X(m)X(m)500500 2500250015001500
Stacked & Deconvolved DataStacked & Deconvolved Data
Point Scatterer DataPoint Scatterer Data
00
0.50.5
1.01.0
1.51.5
2.02.0
Tim
e (s
ec)
Tim
e (s
ec)
X(m)X(m)500500 2500250015001500
Point Scatterer ModelPoint Scatterer Model
X(m)X(m)500500 2500250015001500
KM Migration Image ofKM Migration Image of Stacked DMO DataStacked DMO Data
X(m)X(m)500500 2500250015001500
KM Migration Image of KM Migration Image of Stacked & Deconvolved DataStacked & Deconvolved Data
OutlineOutline
• ObjectiveObjective• MethodologyMethodology Numerical ResultsNumerical Results Point Scatterer ModePoint Scatterer Mode SEG/EAGE Overthrust ModelSEG/EAGE Overthrust Model
• ConclusionsConclusions
X (Km)X (Km)
0.50.5
1.01.0
1.51.5
2.02.0
2.52.5
5.05.0 10.010.0 15.015.0
Tim
e (s
ec)
Tim
e (s
ec)
Synthetic Zero-offset DataSynthetic Zero-offset Data
SEG/EAGE Overthrust DataSEG/EAGE Overthrust Data
X (Km)X (Km)
0.50.5
1.01.0
1.51.5
2.02.0
2.52.5
5.05.0 10.010.0 15.015.0
Tim
e (s
ec)
Tim
e (s
ec)
Stacked DMO DataStacked DMO Data
SEG/EAGE Overthrust DataSEG/EAGE Overthrust Data
X (Km)X (Km)
0.50.5
1.01.0
1.51.5
2.02.0
2.52.5
5.05.0 10.010.0 15.015.0
Tim
e (s
ec)
Tim
e (s
ec)
Stacked & Deconvolved DMO DataStacked & Deconvolved DMO Data
SEG/EAGE Overthrust DataSEG/EAGE Overthrust Data
X (Km)X (Km)
0.50.5
1.01.0
1.51.5
2.02.0
2.52.5
5.05.0 10.010.0 15.015.0
Tim
e (s
ec)
Tim
e (s
ec)
Synthetic Zero-offset DataSynthetic Zero-offset Data
SEG/EAGE Overthrust DataSEG/EAGE Overthrust Data
OutlineOutline
• ObjectiveObjective• MethodologyMethodology• Numerical ResultsNumerical Results ConclusionsConclusions
ConclusionsConclusions
• Decrease DMO artifacts;Decrease DMO artifacts;
• Improve the quality of DMO image;Improve the quality of DMO image;
• Improve the resolution of poststack Improve the resolution of poststack
image.image.
DMO deconvolution can:DMO deconvolution can:
Future WorkFuture Work
Test on 2-D field dataTest on 2-D field data
Apply to 3-D dataApply to 3-D data
Decrease computational costDecrease computational cost
AcknowledgementsAcknowledgements
I am grateful for the financial I am grateful for the financial support from the members of support from the members of the 2000 UTAM consortium.the 2000 UTAM consortium.
