Migration Deconvolution Applied to Pemex Marine Seismic Data

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)