Safer, Finer, Better Dukhan 3D: An ultra high density, full wide azimuth seismic survey for the future Jean-Jacques Postel CGGVeritas

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1 Safer, Finer, Better Dukhan 3D: An ultra high density, full wide azimuth seismic survey for the future Jean-Jacques Postel CGGVeritas 2nd Finding Petroleum event on onshore seismic November

2 Outline Evolutions of Land 3D in Middle East Qatar Petroleum project: main challenges CGGVeritas integrated solution Conclusion

3 Common Shot 3D Imaging: Standard Land 3D Large group interval, arrays

4 Common Shot 3D Imaging: WAZ High Density Single sensor, single source, Trace density multiplied by more than 50

5 Outline Evolutions of Land 3D in Middle East Qatar Petroleum project: main challenges CGGVeritas integrated solution Conclusion

6 The Challenges of the Dukhan Project Mature reservoir Large oilfield discovered in wells Natural depletion Development has staged A new reservoir model needed Complex surface conditions Industrial areas and Sebkha Desert and transition zone High resolution wide azimuth Unprecedented volume of data Heavy logistics (super crew) Implementation of latest technologies Field data management, QA & QC Leading edge equipment implementation Integrated surface/downhole acquisition Integrated processing & imaging

7 Outline Evolutions of Land 3D in Middle East Qatar Petroleum project: main challenges CGGVeritas integrated solution Conclusion

8 Live Patch Max cross-line offset:2100m Max in-line offset:2516m SPREAD: 36 lines with 672 receivers 7.5m receiver and source interval Receiver line interval 120m Source line interval 90m Square bin 3.75m Fold : Over 500 Live patch 5km by 4.2km of channels

9 The Challenges in Scope and Location 164 km² Airgun Transition 0-12 m 669 km² Vibroseis No night vibration Extended vibration hours 24 hr vibrator operations 30 km² Explosive Sekkra

10 The Challenges of the Project in Numbers 863 sq.km 2,909,044 source points 3.75m x 3.75m bin 40,000 Sercel channels with single geophone 2TeraBytes of data per day (4,000 CDs) 3 different energy sources 24 hour operations 24 months of recording 700 km of telemetric cables 2,000 solar panels (110KVA) 17 Nomad65 Sercel 92 vehicles 20 vessels 120 trailers 11,000 km driven per day 12 tons of diesel per day 55 tons of water per day 2 tons of food & drinks per day 370 junior employees 60 managers/technicians 30 nationalities 320,000 working hours/month Over 5 Mh worked without LTIs

11 Planning: Operations Schedule Area by Area Recorded 1x Recorded 2x Recorded 3x Recorded 4x SP 1 origin RP Swath examples Shooting plan (SP) Areas

12 Real Time DGPS Positioning Reference positioning network Mapping (including access, hazards, exclusions, safe operating corridors) Check offsets Support VSP Erect permanent markers

13 Energy Emission Vibroseis 12 in simultaneous recording Air Gun 920 cu.in / 460 cu.in / Mini Source Explosive Single hole 10m depth

14 Recording Data Laying geophones and seismic cables ahead of recording Connecting batteries & solar panels Monitoring of ground equipment with the recording truck (24 hours) Management stakeless recording of 3 fleets of 4 vibrators Troubleshooting (24 hours) Picking up ground equipment after recording for redeployment by front crews

15 Sebkha & Tidal Areas Tractor and track drilling of shotholes in sebkha, casing holes in advance of recording operations Monitoring of tides and water levels to deploy recording equipment Monitoring of explosive daily deliveries, loading of seismic explosives and electric detonation for seismic data recording Cleaning of shothole sites by green crew Logistic by special low ground pressure vehicle when possible if all equipment is not hand carried in and out

16 Combined Surface & Massive 3D Vertical Seismic Use VSPs to improve reservoir knowledge and refine surface seismic processing parameters In partnership with Baker Hughes 8 Massive 3D VSPs Sercel Maxiwave 100 levels tool Recording unit synchronized with seismic recorder Record all surface seismic channels within 2 km radius of the well location (30000 VP)

17 3D VSP Processing/Imaging/Inversion 3D VSP processing Tool reorientation, FB picking, statics, SC deconvolution Wave field regularization, Interpolation/ level/c for 3D processing, HR Imaging purposes Wave field separation (Up/Down,P,S), U/D deconvolution z t zc full WF P Down P Up P Up NMO corrected

18 Base Camp Logistics & Support Project Management Coordination & Planning QHSE Client representative Logistics & Support Repair & Maintenance Workshops Journey management Clinic / Medevac Catering & Housekeeping QA/QC

19 Hardware at the Base Camp 16 x nodes and 6 TB server Data Storages: 104TB usable 3x Recorder NAS 2TB RAID10 8 x ibm 3592 cart drive and tape server

20 Quality Control Workflow: Every Second Counts

21 TeraQC A Unique QA/QC Tool

22 Linearly moved out (4200 m/s) Cross spread data Many refractors, many ray paths exist Receivers Shots

23 Early Field Results Good reflection from primary to secondary target levels High resolution data, Hz New faults located on early results

24 Data processing No Noise Attenuation 3DFK Adaptive Groundroll Attenuation

25 Data processing of HD data (QP EAGE 11) Time slice Cross line

26 Outline Evolutions of Land 3D in Middle East Qatar Petroleum project: main challenges CGGVeritas integrated solution Conclusion

27 Can you tell we were there? During After

28 Conclusion A broad and unique portfolio of expertise Sound project management Team spirit & highly trained people Operational & QHSE excellence R&D team imbedded in the field Sercel technology & support Leading edge processing technology and skills

29 Acknowledgments to Qatar Petroleum