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ARE SBOPS SAFE – Ophir Energy Plc

Ophir Energy Plc · May 1, 2010 · 37 slides

Investor presentation from the Shale Experts oil & gas presentation and slide database. Every page is imaged and its text indexed for search across operators, plays, basins and time.

Slides

  1. ARE SBOPS SAFE – Ophir Energy Plc – slide 1
    Are SBOPs Safe f David Bond Ophir Energy plc
  2. ARE SBOPS SAFE – Ophir Energy Plc – slide 2
    Africa - Net Deepwater Acreage Competitive(square Advantage kilometres or sqkm) 15,000 20,000 25,000 30,000 35,000 40,000 45,000 50,000 55,000 60,000 65,000 70,000 75,000 80,000 85,000 90,000…
  3. ARE SBOPS SAFE – Ophir Energy Plc – slide 3
    One of the key constraints facing the oil and gas industry currently is lack of drilling equipment due to increased demand. This is particularly acute for equipment capable of drilling in deepwater. In 2006, Fearnley Offshore produced a…
  4. ARE SBOPS SAFE – Ophir Energy Plc – slide 4
    Five wells in 86 days (excluding mobilisation). Two gas discoveries - Fortuna & Lykos. First use of Surface Blow Out Preventer (SBOP) on drillship. SBOP extends water depth range from 1,200 m to in excess of 1,800m Loading…
  5. ARE SBOPS SAFE – Ophir Energy Plc – slide 5
    Equatorial Guinea: Block R Deep Venture water depth capability Too deep for Deep Venture Deep Venture Water Depth Capability 5
  6. ARE SBOPS SAFE – Ophir Energy Plc – slide 6
    Equatorial Guinea: Block R 100% of prospects now accessible with SBOPs Deep Venture Water Depth Capability 6
  7. ARE SBOPS SAFE – Ophir Energy Plc – slide 7
    Large ID 18 Subsea BOP. Weight W i ht about b t 200 tto 300t. 300t Large ID low pressure riser normally needs buoyancy in deepwater. Well control via choke and kill lines on outside of riser. Need large deck space and…
  8. ARE SBOPS SAFE – Ophir Energy Plc – slide 8
    In 1995 Unocal started 18 Surface experimenting with SBOPs to BOP reduce overall drilling costs. 18 stack suspended in moon pool from riser tensioners. Casing cemented in at seabed. No emergency disconnect facility. 13 21…
  9. ARE SBOPS SAFE – Ophir Energy Plc – slide 9
    13 18 Surface Surface BOP BOP Shell modified system to include Subsea Shut-In Device (SID). Allows application of SBOP in harsher environments. Including SID allows SBOP to be 13 used on a DP or moored vessel. Subsea…
  10. ARE SBOPS SAFE – Ophir Energy Plc – slide 10
    Diverter Slip Joint Stress Joint 135/8 Connector Surface BOP 135/8 Connector 135/8 Connector SID Stress Joint 183/4 Connector Riser 133/8 Casing Surface BOP Arrangement 10
  11. ARE SBOPS SAFE – Ophir Energy Plc – slide 11
    Multiple Control Systems i) Multiplex ii) Acoustic iii) ROV ShearRams Shear Rams Intervention 183/4 Connector Connecto SID stored between rigs g conventional BOP Subsea Shut In Device (SID) 11
  12. ARE SBOPS SAFE – Ophir Energy Plc – slide 12
    Transition Joint SID Running SBOP: Running SID into the Moonpool 12
  13. ARE SBOPS SAFE – Ophir Energy Plc – slide 13
    Large amount of detailed engineering planning to make it all fit together efficiently Running SBOP: Preparing to Run Tension Ring 13
  14. ARE SBOPS SAFE – Ophir Energy Plc – slide 14
    Preparing to pick up p p SBOP Running SBOP: Preparing to Pick Up SBOP 14
  15. ARE SBOPS SAFE – Ophir Energy Plc – slide 15
    SBOP landed l d d on 135/8 wellhead Simple Land Rig BOP Choke Line Running SBOP: Landing SBOP on Wellhead 15
  16. ARE SBOPS SAFE – Ophir Energy Plc – slide 16
    Slip JJoint Sli i t being b i installed. This allows rig to move whilst Riser Tensioners hold riser still Running SBOP: Preparing to Run Slip Joint 16
  17. ARE SBOPS SAFE – Ophir Energy Plc – slide 17
    SBOP goes underwater as the SID is lowered to land on Wellhead Running SBOP: SBOP Going Underwater 17
  18. ARE SBOPS SAFE – Ophir Energy Plc – slide 18
    SID Connector Guide Funnel 183/4 Wellhead 36 Conductor SID Connected to Wellhead from the ROV 18
  19. ARE SBOPS SAFE – Ophir Energy Plc – slide 19
    Running SBOP: SBOP in place in the Moonpool 19
  20. ARE SBOPS SAFE – Ophir Energy Plc – slide 20
    36 Conductor 133/8 Casing Conventional 183/4 Wellhead 20
  21. ARE SBOPS SAFE – Ophir Energy Plc – slide 21
    Limited Casing g Strings: g Using 133/8 riser limits casing strings. Need to use liners. Not suitable for deep high-pressure wells: Generally need more casing strings, ie hole too small. Surface S face pressure p ess e…
  22. ARE SBOPS SAFE – Ophir Energy Plc – slide 22
    Conventional 36 22 18 18 133/8 113/4 95/8 7 6 hole to TD 6 Not to scale Conventional Casing Design 22
  23. ARE SBOPS SAFE – Ophir Energy Plc – slide 23
    SBOP Casing Design Conventional SBOP 36 36 or 30 22 133/8 18 95/8 133/8 113/4 7 Contingency 7 95/8 7 6 hole to TD Not to scale SBOP Casing Design 23
  24. ARE SBOPS SAFE – Ophir Energy Plc – slide 24
    1. Are SBOPs Safe 2. How do you demonstrate it Are SBOPs Safe 24
  25. ARE SBOPS SAFE – Ophir Energy Plc – slide 25
    Managed g by y Stena Drilling. g Station Keeping Study to confirm the Deep Venture capability bilit - Kongsberg, K b Norway. N Riser Analysis to ensure no riser failure - 2H Offshore, Woking. Quantitative Risk Assessment -…
  26. ARE SBOPS SAFE – Ophir Energy Plc – slide 26
    Study performed by Kongsberg. No effects of adding SBOP. Disconnect time less than conventional Subsea BOPs. Station Keeping Analysis of Deep Venture 26
  27. ARE SBOPS SAFE – Ophir Energy Plc – slide 27
    Riser Analysis 2H Offshore: Focus on likely fatigue life. Understand if VIV suppression required. Any wave loading issues. issues Conclusions: Vam Top 133/8- eight year fatigue life. Vam Top FE - 43 year fatigue life:…
  28. ARE SBOPS SAFE – Ophir Energy Plc – slide 28
    Quantitative Risk Assessment (QRA) IRC Houston Performed detailed QRA similar to that performed by Shell and Stena on the Stena Tay. Tay Understand effect of using g a dynamically y y positioned p vessel. Understand U d t d…
  29. ARE SBOPS SAFE – Ophir Energy Plc – slide 29
    Quantitative Risk Assessment (QRA) Looks at the failure path leading to a blow out. Describe logic leading to failure. Apply probabilities/frequencies to each failure point. The Th result lt indicates i di t th the lik…
  30. ARE SBOPS SAFE – Ophir Energy Plc – slide 30
    Quantitative Risk Assessment (QRA) Blowout AND Take a Kick BOP Fails to Close Equipment Fails AND OR Reservoir Equipment q p out of spec p Mud weight too low OR OR Swab Human error Human error Mud weight too low Build…
  31. ARE SBOPS SAFE – Ophir Energy Plc – slide 31
    Quantitative Risk Assessment (QRA) Blowout X AND Take a Kick BOP Fails to Close Equipment Fails AND OR Reservoir Equipment q p out of spec p Mud weight too low OR OR Swab Human error Human error Mud weight too low…
  32. ARE SBOPS SAFE – Ophir Energy Plc – slide 32
    Quantitative Risk Assessment (QRA) Blow Out Mechanisms Kick and BOP Fails Kick and BOP Closed too late Riser Failure and BOP Fails Kick and Shoe Failure (underground blowout) Choke and Kill Failure and Kick See SPE/IADC…
  33. ARE SBOPS SAFE – Ophir Energy Plc – slide 33
    Drillship Comparison of Subsea BOP vs SBOP w/SID Blowout Frequency per Well Drilled 1.00E-03 Subsea BOP SBOP with SID well drilled SSA 1.00E-04 wout Frequency per w 1.00E-05 Blow 1.00E-06 Failure to…
  34. ARE SBOPS SAFE – Ophir Energy Plc – slide 34
    Drillship p Comparison p of SBOP vs SBOP with SID Blowout Frequency per Well Drilled 1.00E-03 SBOP SBOP with SID ncy per well drilled 1.00E-04 ut Frequen 1.00E-05 Blowou 1.00E-06 Failure to control/isolate…
  35. ARE SBOPS SAFE – Ophir Energy Plc – slide 35
    Blowout Duration Subsea BOP vs. SBOP with SSA (Frequency per Well Drilled) 1.00E-03 Duration (per Well Driilled) Subsea BOP SBOP with SSA 1 00E 04 1.00E-04 Blowout Frrequency D 1.00E-05 B…
  36. ARE SBOPS SAFE – Ophir Energy Plc – slide 36
    Are SBOPs Safe Absolutely, QRA suggests significantly safer Absolutely than a single Subsea BOP. Provided: 1. Engineered g correctly y 2. Understand limitations Conclusions 36
  37. ARE SBOPS SAFE – Ophir Energy Plc – slide 37
    SBOPs p potentially y safer than conventional Subsea BOPs: driven by essentially by having two BOPs. SID essential on DP vessel. vessel Recommended on moored vessel. Conclusions 37

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