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MC 252 #1 – Macondo Prospect OCS-G-32306 Well Control Simulation Results April 29, 2010

MC 252 #1 – Macondo Prospect OCS-G-32306 Well Control Simulation Results April 29, 2010. Case 2 – Surface Exit Up The Riser 7” x 9-7/8” Casing Flowpath; Drillstring in Rotary Table. Assumptions: Drillpipe remains in tact and provides choke at the subsea BOP. Oil Rate Gas Rate

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MC 252 #1 – Macondo Prospect OCS-G-32306 Well Control Simulation Results April 29, 2010

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  1. MC 252 #1 – Macondo Prospect OCS-G-32306 Well Control Simulation Results April 29, 2010

  2. Case 2 – Surface Exit Up The Riser 7” x 9-7/8” Casing Flowpath; Drillstring in Rotary Table • Assumptions: • Drillpipe remains in tact and provides choke at the subsea BOP. Oil Rate Gas Rate 110,000 bpd 155 mmscf

  3. Case 4 – Surface Exit Up The Riser 7” x 9-7/8” Casing Annulus Flowpath • Assumptions: • Wellhead packer does not provide isolation. Oil Rate Gas Rate 64,000 bpd 91 mmscf

  4. Case 7 – Seafloor Exit 7” x 9-7/8” Casing Annulus Flowpath • Assumptions: • Drillpipe inside Riser with LMRP disconnected at subsea BOP • Worst-Case Restricted Seafloor Annulus Flow Oil Rate Gas Rate 69,500 bpd 70 mmscf

  5. Case 8 – Seafloor Exit 7” x 9-7/8” Casing Annulus Flowpath • Assumptions: • Crushed Riser splits 5-1/2” drill pipe at subsea BOP and allows flow out 6-5/8” drill pipe. ID Oil RateGas Rate 5.625” 51,80054 4.000” 42,10045 3.000” 23,60026 2.000” 8,600 10 0.730” 1,000 2

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