January to March, 2009 – W & T Offshore, Inc.

Pollution:	54.1 bbl	Crude Oil/ Condensate:	54.1 bbl Crude Oil
Refined Petroleum:	None	Synthetic Oil Fluids*:	None
Chemicals:	None	Event:	Pollution
MMS Investigation Report:	Accident Incident Reports Only	Activity:	Decommissioning/Salvage
Lease:	G05525	Operation:	Submerged Platform
Area:	Eugene Island	Causes:	Hurricane Ike
Block:	371	Distance to Shore:	93 Miles
Platform:	B	Water Depth:	415 Feet

Remarks: The Eugene Island 371 B  4-pile fixed platform with skirts, installed in Federal waters in 1987, was destroyed by Hurricane Ike in September 2008.  Approximately 54.1 bbl seeped from the structure between January 1 and March 31, 2008.

2008 NRC Report:  None

April 19, 2009 – LLOG Offshore, Inc.

Remarks:  Operating from the semisubmersible drilling rig Noble Lorris Bouzigard (constructed in 1975), after perforating the subject well during the initial completion operation, the hole lost 14.4 ppg calcium bromide completion fluid.  Gas in riser and 709 bbl of calcium bromide completion fluid was discharged through the diverter.  All non-essential personnel were evacuated while Wild Well Control and Halliburton worked to bring under control.  Drillpipe was hot tapped on 4/22/2009, circulated well all day with no additional gas detected.  Incident currently under investigation - information subject to change.

NRC Report:  903185

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May 3, 2009 – Shell Offshore Inc.

Pollution:	70.0 bbl	Crude Oil/ Condensate:	None
Refined Petroleum:	None	Synthetic Oil Fluids*:	None
Chemicals:	70.0 bbl Methanol	Event:	Pollution
MMS Investigation Report:	Accident Incident Report Only	Activity:	Development/Production
Lease:	G08241	Operation:	Production
Area:	Garden Banks	Causes:	Equipment Failure
Block:	426	Distance to Shore:	168 miles
Platform:	A - Auger	Water Depth:	2,860 Feet

Remarks:   While the operator on the Garden Banks A-Auger tension leg platform (installed in 1994) was attempting to equalize pressure across a subsea safety valve (SCSSV) on a well prior to opening it.  When 58 bbl of methanol were pumped into a methanol line feeding a group of three wells, the methanol flowed either into one of the other two wells, via a malfunctioning valve, or was released to the environment through a leak. Because this leak was at a subsea location with a 2860 foot water depth and the tubing interconnections are complex, the diagnostic process is complicated.  In the process of identifying the leak, an additional 12 bbl of methanol was pumped through the tubing during tests, for a total release of 70 bbl of methanol prior to securing the leak.

NRC Report:  904605  and 904792

May 28, 2009 – Devon Energy Production Company, Inc.

Pollution:	102.7 bbl	Crude Oil/ Condensate:	None
Refined Petroleum:	None	Synthetic Oil Fluids*:	102.7 bbl           Synthetic Base Fluids in 223.3 bbl of 46% Rheliant SBM
Chemicals:	None	Event:	Pollution
MMS Investigation Report:	Completed 27-July-2009	Activity:	Exploration
Lease:	G19545	Operation:	Drilling
Area:	Keathley Canyon	Causes:	Equipment Failure & Human Error
Block:	291	Distance to Shore:	200 miles
Rig:	Seadrill West Sirius	Water Depth:	5,851 Feet

Remarks:  Devon Energy reported 223.3 bbl of 46% Rheliant 46% synthetic based mud (SBM) was unintentionally discharged from the Seadrill West Sirius semisubmersible drilling rig (built in 2008) into the Gulf of Mexico.  This discharge was a result of an incorrect valve lineup on the hydraulic supply to the Diverter Control Unit.  It is estimated that the lost SBM contained approximately 102.7 barrels of synthetic base fluids.  In addition, prior to discovering the incorrect valve line-up, returns were lost during cementing operations with no evidence that the trip tank was not being properly monitored. The investigation determined that an improper seal of the telescopic slip joint resulted from the lack of hydraulic supply pressure causing the loss of SBM.  A hydraulic supply block valve was inadvertently left closed following recent maintenance operations, leading to inadequate pressure to seal the slip joint.

Accident Investigation Report:  Form2010 28-May-2009 KC291

NOAA Incident News:  8029

NRC Report:  906859

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July 25, 2009 – Shell Pipeline Company

Pollution:	estimated 1,500 bbl Preliminary	Crude Oil/ Condensate:	1,500 bbl Crude Oil
Refined Petroleum:	None	Synthetic Oil Fluids*:	None
Chemicals:	None	Event:	Pollution
MMS Investigation Report:	Under Investigation	Activity:	Development/Production
Lease:	N/A	Operation:	Pipeline, Production
Area:	Ship Shoal	Causes:	Under Investigation
Block:	142	Distance to Shore:	33 miles
Pipeline Segment:	# 4006	Water Depth:	50 Feet

Remarks: At 6:00 p.m. on Saturday, July 25, 2009, the Shell Pipeline Company shut-in the Eugene Island Pipeline System due to the loss of  pressure.  The DOT-regulated 20" oil pipeline segment #4006 (originating in South Marsh Block 128 and terminating in South Timbalier Block 11) installed in Federal waters in 1996, had developed a leak in Ship Shoal Block 142.  The initial spill estimate on Monday, July 27 was 1,400 bbl.  The Marine Spill Response Corporation (MSRC) responded to the spill. A total of 220 gallons of Corexit 9527 dispersants were applied on Monday by the MSRC's King Air aircraft.  Two of MSRC's responder class vessels were dispatched, the Louisiana Responder began skimming on Monday morning, and the Gulf Responder should be on site Tuesday.  Shell engaged a dive vessel to inspect the section of pipeline involved with a goal to develop a repair and restart plan later in the week.

NRC Report:  912739

NOAA Incident News:  8061

One barrel (bbl) equals 42 U.S. gallons (gal)

Synthetic Oil Fluids*: In deepwater drilling, synthetic-based muds (SBM’s) are preferred over petroleum oil-based muds (OBM’s) due to the SBM's superior performance properties. The synthetic oils used in SBM’s are relatively non-toxic to the marine environment and have the potential to biodegrade.

60%**: Indicates that for a synthetic-based mud release, the exact percentage of volume of synthetic base oil to total volume of mud released was not available and 60% was used as a reasonable approximation.

75%***: Indicates that for an oil-based mud release, the exact percentage of volume of base oil to total volume of mud released was not available and 75% was used as a reasonable approximation. Diesel is assumed to be the base oil in OBM unless otherwise specified.