Technical Briefing

Kent Wells: Thursday June 10th, 2010

LMRP Cap Oil collection

73,300Cumulative

6,100Cumulative

16,600Cumulative

27,700Cumulative

42,500Cumulative

57,500Cumulative

15,800per day

6,100per day

10,500per day

11,100per day

14,800per day

15,000per day

-

10,000

20,000

30,000

40,000

50,000

60,000

70,000

June 4th June 5th June 6th June 7th June 8th June 9th

Bar

rels

per

day

-

10,000

20,000

30,000

40,000

50,000

60,000

70,000

80,000

Cum

ulat

ive

Bar

rels

Cumulative barrels Barrels/day

Lightering – Transferring Oil from Enterprise to Massachusetts (and Ultimately to Shore)

Discoverer Enterprise

Massachusetts Tanker

Q4000

LMRP Cap with Q4000 Direct Connect(up to 28,000 BOPD combined capacity)

Q4000 Direct Connect

• Q4000 reconfigured for Direct Connect:

Top Kill equipment replaced with production equipment

5,000 – 10,000 barrels of oil per day capacity

• Flare both oil & gas via ‘EverGreen’ burner – used globally but new to GoM

Dual Long Term Containment

#2 Floating Riser

#2 Floating Riser

Helix Producer and Evi Knutsen or Juanita Tanker

Helix Producer and Evi Knutsen or Juanita TankerToisa Pisces and Loch

Rannoch TankerToisa Pisces and Loch

Rannoch Tanker

#1 Floating Riser

#1 Floating Riser

Subsea Dispersant and

Hydrate Inhibition Capability

Subsea Dispersant and

Hydrate Inhibition Capability

Surface: Key Vessels

Plus 2 Additional Tankers:

Evi Knutsen and Juanita

Toisa Pisces

Loch Rannoch

Helix Producer

Production Vessels Storage Tanker Support

Subsea Equipment Fabrication Underway

Overshot Tool58” Diameter

34’ Tall, 75 Tons

Overshot Tool58” Diameter

34’ Tall, 75 Tons

Air Can #126’ Diameter

45’ Long

Air Can #126’ Diameter

45’ Long

New Manifold49’ x 25’ x 11’

45 Tons

New Manifold49’ x 25’ x 11’

45 Tons

Suction Piles14’ Diameter

90’ Long

Suction Piles14’ Diameter

90’ Long

Creating Redundancy & Optionality

• Discoverer Clear Leader

• Enterprise-Class Drillship

• Up to 20,000 barrels per day capacity

• 124,000 barrels oil storage capacity

Timeline and Associated Vessels

June July

LMRP Cap: Discoverer Enterprise

w/ Tanker Support (Massachusetts and Overseas Cascade)

Near Term Containment #1:

Q4000 Direct Connect

Discoverer Clear LeaderMultiple Options

- Kill Line Connection (5 -10)- Replacement Vessel (up to 20)

Long Term Containment #1:

Toisa Picses FPSO w/ Loch Rannoch Tanker

Long Term Containment #2:

Helix Producer w/ EviKnutsen or Juanita Tanker

Creating Redundancy

(15 - 18) (15 - 18) = Oil Capacity per Day(5 - 10)

(20 - 25) (20 - 25)

1st 15th 1st 15th