Zero Visibility Operations Planning - DrillSafe

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Impact of Environment on <strong>Operations</strong> • Running TGB - May end-up away from rig centre – due to strong currents - May be landed on an angle if seabed soft or uneven - Could sink in the soft seabed 8
Impact of Environment on <strong>Operations</strong> • Running 30” & 20” with PGB - Could be pushed away from well centre - PBG angle might be unknown if bulls eyes aren’t visible with ROV 9
Page 1 and 2: Petrel-7 Zero Visibility Operations
Page 3 and 4: What Causes Zero Visibility at Petr
Page 5 and 6: Seabed Survey Water Depth ~98m LAT
Page 7: NW Field Seismic Main Line Multiple
Page 11 and 12: Impact of Environment on Operations
Page 13 and 14: Solution Criteria • To overcome t
Page 15 and 16: Recommended Solution - Positioning
Page 17 and 18: USBL vs LBL • Ultra-short Baselin
Page 19 and 20: Operational Challenges • Deployin
Page 21 and 22: Installation of the LBL Array • B
Page 23 and 24: Multi-Beam Sonar • Initial result
Page 25 and 26: Actual Results - Running Casing 25
Page 27 and 28: Acoustic Inclinometers • Inclinom
Page 29 and 30: Lessons • Allow time to field tri

Zero Visibility Operations Planning - DrillSafe

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