exploring for future gas in azerbaijan: global technology ...€¦ · value of 3d seismic data:...
TRANSCRIPT
© BP 2006
Exploring for future gas in Azerbaijan: Global technology and local cooperation
Greg Riley
BP Azerbaijan, Georgia & Turkey
Oil and Gas Conference June 5th, Baku, Azerbaijan
Azerbaijan Historical Oil and Gas Production
Azerbaijan Oil and Gas business
• Azerbaijan has built a >1million barrel equivalent/day oil and gas
industry
• Upstream, midstream and downstream assets and supporting
infrastructure
To maintain industry near this scale
• Continued investment in improving recoveries of existing fields
• Large-scale oil and gas exploration required to maintain supply
Oil a
nd
Ga
s p
rod
uctio
n in
10
00
s o
f ba
rrels
oil e
qu
iva
len
t pe
r da
y
Onshore Offshore
billi
on
s o
f b
arr
els
oil e
qu
iva
len
t
Oil
Gas
Total
Azerbaijan Historical Oil and Gas Discoveries
Onshore Nearshore Offshore
150 year history of Oil and Gas exploration
• > 30 billion barrels discovered to date
• Onshore to offshore deeper waters
• Latest discoveries deeper higher
pressure gas
ACG OBC PSDM Shah Deniz OBS FWI
04/06/2014
Pre-
Fasilia
Pre-
Fasilia
Shah Deniz
PreFasila
Shafag Asiman
Fasila and PreFasila
BAKU
Future Gas Sources Exploring Deeper Reservoirs
A history of seismic advances in Azerbaijan
2000 2001 1995 2006 2007 2004 2005 2011 1996 1997 1998 1999 2002 2003 2010 2008 2009
ACG
3D TS SD 3D TS
ACG 4D
OBC Trial
Anisotropic Depth
Processing
FWF Inversion
Processing
1. Exploration/Appraisal 2D and 3D Surveys
Regional 2D and PSA specific 3D towed streamer acquisition (time domain processing)
2. Testing new ideas for Appraisal and Development
Depth domain processing tests/application to existing 3D seismic
Key tests on Ocean Bottom Cable acquisition and 4D seismic.
3. Deploying New Technology and return of Gilivar
The ACG ‘CARSP’ project deploys OBC for new 3D/4D images
Shah Deniz acquires full field OBC
ACG and SD apply advanced anisotropic depth migration to improve image of steep flanks
Full Waveform Inversion is used to improve crestal velocities
Return of the Gilivar – 3D data processed in Baku to PSDM.
2D ACG Full Field OBC – 4D
SD OBC
2012
Shafag Asiman 3D
Depth Image
Reprocessing
2013 2014
Advances in Seismic Technology Exploration – The return of the Gilavar TS 3D
Air guns
6x6km
Cables 560 m 250m
100m
Shafag-Asiman
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2
ESIA
ACQ
PSTM
PSDM
2013 2011 2012
Mob
Time
Processing
• Acquired in 1996-98
• Poor S-N ratio
• Dipping noise
Shafag-Asiman: 2D seismic data Original Processing
• Reprocessed by
SOCAR with PSTM
workflow
• Improved resolution
at deep levels
• Reduced noise
• Some artefacts at
depth remain
Shafag-Asiman 2D seismic data Seismic Reprocessing 2008
• Acquired and
processed by
Caspian
Geophysical JV
• Improved resolution
at deep levels
• Reduced noise
• Some artefacts at
depth remain
Shafag-Asiman 3D seismic data Prestack Time Migration (PSTM)
• Acquired and
processed by
Caspian
Geophysical JV
• Improved resolution
at deep levels
• Reduced noise
• Improved image at
crestal area
Better structural definition and event
continuity (4 tomographic iterations )
Shafag-Asiman 3D seismic data Prestack Depth Migration (PSDM)
Shafag-Asiman: 2D seismic data Original Processing
• Acquired in 1996-98
• Poor S-N ratio
• Dipping noise
Iteration 1 Iteration 2
Iteration 4 Iteration 3
Value of 3D seismic data: Tomographic Processing and Pore Pressure prediction from velocity
well
BP, 2012
ACG
Paleogeographic Interpretation from:
• Regional well database
• Extensive 2D seismic coverage
• 3D data/detailed interpretation
• Outcrops
Improved seismic adds resolution to reservoir
Advanced processing flow at Shafag-Asiman:
− Tomographic velocity analysis for PSDM velocity model
− Advanced noise attenuation techniques (e.g. 3D SRME)
Local focus
− Strategic drive to process data locally
− Majority of 2010-2012 processing done at Caspian
Geophysical (CG) and SOCAR
− Developing local expertise
− Many processing steps done in Azerbaijan for the first
time (e.g. tomographic velocity model building, 3D SRME,
high-end 4D TS processing at East Azeri field). CG
personnel have been trained accordingly to meet the
requirements
− Building capability
− CG increased hardware capacity - CPUs increased about
3.7 times (616 vs. 168) and disk space increased 2.4
times (165 Tb vs. 70 Tb).
Advances in Seismic Technology Developing local capability
Application of Basin Modelling Technology at Scale
Today Future
3D Basin Modelling
used in Caspian for
last decade to study:
• Migration History
• Fluid and Pore
Pressure
Predictions
• Seal Capacity
• Hydronamic flow
and tilted contact
models
• Basin Model calibration to seismic
data project to validate different
scenarios
20 K PSI The Next Frontier
Azerbaijan Historical Oil and Gas Production
Azerbaijan Oil and Gas business
• Azerbaijan has built a >1million barrel equivalent/day oil and gas
industry
• Upstream, midstream and downstream assets and supporting
infrastructure
To maintain industry near this scale
• Continued investment in improving recoveries of existing fields
• Large-scale oil and gas exploration required to maintain supply
Oil a
nd
Ga
s p
rod
uctio
n in
10
00
s o
f ba
rrels
oil e
qu
iva
len
t pe
r da
y
Onshore Offshore