Migration Deconvolution Migration Deconvolution Applied to Pemex Marine Applied to Pemex Marine

Seismic DataSeismic Data

Guoan Luo and Sergio ChGuoan Luo and Sergio Chaavez-Perezvez-Perez**

**Mexican Petroleum Institute (IMP)Mexican Petroleum Institute (IMP)

Feb 3, 2006Feb 3, 2006

OutlineOutline

• Objectives

• Migration Deconvolution

• PEMEX Data

• Ongoing and Future Work

OutlineOutline

• Objectives

• Migration Deconvolution

• PEMEX Data

• Ongoing and Future Work

ObjectivesObjectives

Apply MD to a rather complex marine data set

Speed MD up and make it a practical imaging tool

OutlineOutline

• Objectives

• Migration Deconvolution

• PEMEX Data

• Ongoing and Future Work

Migration image

Reflectivity

Migration

Modelingd=Lm

mmL LT

L d T mig

Г L LT

Migration Green’s Function

mm L LT -1

][ mig

Г L LT -1

][-1

L LT -1

][ L LT -1

][mL LT m

Migration deconvolution

mig

Deblurring Operator

OutlineOutline

• Objectives

• Migration Deconvolution

• PEMEX Data

• Ongoing and Future Work

20 m.

40 m.

60 m.

80 m.100 m.

200 m.300 m

.400 m

.500 m.

N

IB-102

YAXILTUN-1

ZAZIL HA-1

KAYAB-1 MOAN-1

KANTAAN-1

TABAY-1

TUNICH-101

CHACMOOL-1

CEEH-1

MALOOB-101KU-405

ZAAP-1

AKAL-2001

AKAL-1C-2011

TAKIN-1

NIX-1

KUKULKAN-1

TAKIN-101

LOC. HALACH-1

PECH-1

LOC. PETEN-1

LOC. MANAB-1

LOC.-LAKIN-1

1000 m

FRONTERA

NUEVOCAMPECHITO

CD. DEL CARMEN

TERMINOS LAGUNE

KAMBUL -1

BACAB-1

BOTS-1

LUM-1

SAM-1

POK-1EK BALAM-DL3

BALAM-1EK-101

Campeche BayArea

Location Map

Modified from Rojas et al

5 km

Mitra et al (2005)

Structural EvolutionMitra et al (2005)

Tim

e (s

)0

3.6

0 25X (km)

Migrated Section (inline 200)

Tim

e (s

)0

3.6

0 25X (km)

Migrated Section (inline 400)

Tim

e (s

)0

3.6

0 20Y (km)

Migrated Section (crossline 400)

Tim

e (s

)0

3.6

0 20Y (km)

Migrated Section (crossline 600)

OutlineOutline

• Objectives

• Migration Deconvolution

• PEMEX Data

• Ongoing and Future Work

XY

T

1001

801

1250

25mX25m 100mX100m

Data Cube Grid

Reference Point

Time slice at 1200 ms

Migration vs MD

X (km) 250 X (km) 250

Y (km

)0

20

MDMIG

X (km) 250 X (km) 250

Y (km

)0

20

Time slice at 1600 ms

Migration vs MD

MDMIG

X (km) 250 X (km) 250

Y (km

)0

20

Time slice at 2400 ms

Migration vs MD

MDMIG

0 25X (km)0 25X (km)

Tim

e (s

)0

3.6

MIG MDInline 200

Migration vs MD

0 25X (km)0 25X (km)

Tim

e (s

)0

3.6

MIG MDInline 400

Migration vs MD

MIG MDCrossline 400

Tim

e (s

)0

3.6

0 20Y (km)0 20Y (km)

Migration vs MD

MIG MDCrossline 600

Tim

e (s

)0

3.6

0 20Y (km)0 20Y (km)

Migration vs MD

MIG MDCrossline 200

Tim

e (s

)0

3.6

0 20Y (km)0 20Y (km)

Migration vs MD

MIG MDCrossline 800

0 20Y (km)0 20Y (km)

Tim

e (s

)0

3.6

Migration vs MD

Ongoing WorkOngoing WorkInitial 3D Poststack MD tests show

• Improved spatial resolution in time slices

• Improved structural definition in area of interest

Future WorkFuture Work

3D Prestack MD tests

Improve MD performance for complex velocity models

Make it a more practical imaging tool

AcknowledgementsAcknowledgements

2005 UTAM Sponsors

PEMEX (Petróleos Mexicanos)