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The MMS tracks spill incidents
1 barrel and greater in size of petroleum and other toxic substances
resulting from Federal Outer Continental Shelf (OCS) oil and gas
activities. MMS has historically produced counts and summaries for spills
greater than or equal to 50 barrels (2,100 gallons). The tables below
provide counts for spills of 50 barrels or greater, by year and by OCS
Region. The counts are linked to summaries describing the circumstances
surrounding each spill of 50 barrels or greater for that Region that year.
One barrel (bbl) equals 42 U.S. gallons.
Effective July 17,
2006, MMS revised the regulations for incident reporting. This regulation
did not change the reporting requirement for Spills. Currently all spills
of 1 barrel or more must be reported.
SUMMARY OCS
SPILLS
50 BARRELS 1964 - 2009
(764 KB Excel)
SUMMARY OCS
SPILLS
10-49 BARRELS 1970-2009
(213 KB Excel)
OCS Spills
>
50
Barrels by Category:
 2008-2011
2004-2007
2000-2003
1996-1999
|
OCS Spill Incidents
2008-2011 |
|
Spill > 50 Barrels* |
2008 |
2009 |
2010 |
2011 |
|
GOM |
PAC |
GOM |
PAC |
GOM |
PAC |
GOM |
PAC |
Crude Oil & Natural Gas
Condensate |
19 |
0 |
3 |
0 |
0 |
0 |
0 |
0 |
Refined Petroleum*, e.g.
Diesel, Lube Oil |
5 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Synthetic-Based
Fluids*,** |
2 |
0 |
4 |
0 |
0 |
0 |
0 |
0 |
Chemical, e.g., Zinc
Bromide,
Glycol |
12 |
0 |
3 |
0 |
0 |
0 |
0 |
0 |
| Spill
>Barrels (Totals) |
331,2,3 |
0 |
102 |
0 |
0 |
0 |
0 |
0 |
| Combined
Total for the Year |
33 |
10 |
0 |
0 |
1 Number of spill events with total
spillage of 50 bbl or more. Column does not add because spills
include multi-product spills where no individual product was 50 bbl
or more, and spills which involved the loss of 50 bbl each or more
of two or more individual products.2 Some crude/condensate
spills in 2008 and 2009 are seepage (including observations less
than one bbl) totaling 50 bbl or greater in a calendar quarter from
hurricane-damaged structures undergoing or awaiting decommissioning.
3
2008 includes Hurricanes Gustav and Ike 'passive' spills, unseen
spills based on inventories of products lost from destroyed
structures which were thoroughly dispersed during the storms.
Petroleum losses were minimized due to the successful operation of
safety valves, and all oil and gas operations being shut in prior to
the storms.
*
In the case of drilling muds, only the base fluids (e.g. diesel,
mineral oil, synthetic fluid, etc.) are counted as pollution. A
spill of 100 bbl of 65% diesel-based mud is counted as a 65 barrel
diesel spill. A 100 bbl spill of 55% synthetic-based mud is counted
as a 55 barrel synthetic-based fluid spill.
**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 base fluid used in SBM’s are less toxic to the marine
environment and have the potential to biodegrade. Only the synthetic
base fluids are counted as pollution. SBM's were first
introduced in the Gulf of Mexico around 1999. Petroleum
oil-based muds (OBM's) were the predominant muds prior to this time
(generally with diesel or mineral oil as the base), and are still
used outside of deepwater.
SOURCE: TIMS & MMS Spill
Database as of 3-September-2009
|
|
OCS Spill Incidents 2004-2007 |
|
Spill > 50 Barrels* |
2004 |
2005 |
2006 |
2007 |
|
GOM |
PAC |
GOM |
PAC |
GOM |
PAC |
GOM |
PAC |
Crude Oil & Natural Gas
Condensate |
11 |
0 |
32 |
0 |
7 |
0 |
1 |
0 |
Refined Petroleum*, e.g.
Diesel, Lube Oil |
4 |
0 |
7 |
0 |
0 |
0 |
0 |
0 |
| Synthetic-Based Fluids** |
5 |
0 |
5 |
0 |
5 |
0 |
2 |
0 |
Chemical, e.g., Zinc
Bromide, Glycol |
4 |
0 |
6 |
0 |
2 |
0 |
1 |
0 |
| Spill
>Barrels (Totals) |
221,2,3 |
0 |
491,3 |
0 |
14 |
0 |
4 |
0 |
| Combined
Total for the Year |
22 |
49 |
14 |
4 |
1
Number of spill events with
total spillage of 50 bbl or more. Column does not add because spills
include multi-product spills where no individual product was 50 bbl
or more, and spills which involved the loss of 50 bbl each or more
of two or more individual products.
2 Some crude/condensate
spills in 2006 are seepage (including observations less than one
bbl) totaling 50 bbl or greater in a calendar quarter from
hurricane-damaged structures undergoing or awaiting decommissioning.
3 'Passive' spills, unseen spills based on
inventories of products lost from destroyed structures which were
thoroughly dispersed during the storms ,are included in 2004
(Hurricane Ivan, and 2005 (Hurricanes Katrina & Rita). Petroleum
losses were minimized due to the successful operation of safety
valves, and all oil and gas operations being shut in prior to the
storms.
*
In the case of drilling
muds, only the base fluids are counted as pollution. Spills
where the whole mud volume was 50 barrels or greater but the base
oil/fluid was less than 50 barrels are annotated at the end of the
narratives (two in 2004, one in 2005, and four in
2006).
**
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 base fluid used in SBM’s are less toxic to the marine
environment and have the potential to biodegrade. Only the synthetic
base fluids are counted as pollution. SBM's were first
introduced in the Gulf of Mexico around 1999. Petroleum
oil-based muds (OBM's) were the predominant muds prior to this time
(generally with diesel or mineral oil as the base), and are still
used outside of deepwater.
SOURCE: TIMS & MMS Spill Database
as of 3-September-2009
|
Spill Analysis
CY 2007
(Under Construction)
|
OCS Spill Incidents 2000-2003 |
|
Spill > 50 Barrels* |
2000 |
2001 |
2002 |
2003 |
|
GOM |
PAC |
GOM |
PAC |
GOM |
PAC |
GOM |
PAC |
Crude Oil & Natural Gas
Condensate |
3 |
0 |
1 |
0 |
1 |
0 |
0 |
0 |
Refined Petroleum*, e.g.
Diesel, Lube Oil |
0 |
0 |
0 |
0 |
2 |
0 |
3 |
0 |
| Synthetic-Based
Fluids** |
5 |
0 |
5 |
0 |
7 |
0 |
7 |
0 |
Chemical, e.g., Zinc
Bromide,
Glycol |
0 |
0 |
3 |
0 |
2 |
0 |
2 |
0 |
| Spill
>Barrels (Totals) |
71 |
0 |
9 |
0 |
122 |
0 |
12 |
0 |
| Combined
Total for the Year |
7 |
9 |
12 |
12 |
*
In the case of drilling
muds, only the base fluids are counted as pollution. Spills
where the whole mud volume was 50 barrels or greater but the base
oil/fluid was less than 50 barrels are annotated at the end of the
narratives (two in 2004, one in 2005, and four in
2006).
** 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 base fluid used in SBM’s are less toxic to the marine
environment and have the potential to biodegrade. Only the synthetic
base fluids are counted as pollution. SBM's were first
introduced in the Gulf of Mexico around 1999. Petroleum
oil-based muds (OBM's) were the predominant muds prior to this time
(generally with diesel or mineral oil as the base), and are still
used outside of deepwater.
1 Number of spill events with
total spillage of 50 bbl or more. Column does not add because spills
include multi-product spills where no individual product was 50 bbl
or more, and spills which involved the loss of 50 bbl each or more
of two or more individual
products.
2 2002 includes 'passive'
spills from Hurricane Lili, unseen spills based on inventories of
products lost from destroyed structures which were thoroughly
dispersed during the storms. Petroleum losses were minimized
due to the successful operation of safety valves, and all oil and
gas operations being shut in prior to the storms.
SOURCE:
TIMS
& MMS
Spill Database as of 3-September-2009
|
|
OCS Spill Incidents 1996-1999 |
|
Spill > 50 Barrels* |
1996 |
1997 |
1998 |
1999 |
|
GOM |
PAC |
GOM |
PAC |
GOM |
PAC |
GOM |
PAC |
Crude Oil & Natural Gas
Condensate |
0 |
1 |
1 |
0S |
3 |
0 |
2 |
0 |
Refined Petroleum*, e.g.
Diesel, Lube Oil |
2 |
0 |
0 |
0 |
1 |
0 |
1 |
0 |
| Synthetic-Based
Fluids** |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0 |
Chemical, e.g., Zinc
Bromide,
Glycol |
1 |
0 |
2 |
0 |
5 |
0 |
1 |
0 |
| Spill
>Barrels (Totals) |
3 |
1 |
3 |
0S |
9 |
0 |
5 |
0 |
| Combined
Total for the Year |
4 |
3 |
91 |
5 |
*
In the case of drilling
muds, only the base fluids are counted as pollution. Spills
where the whole mud volume was 50 barrels or greater but the base
oil/fluid was less than 50 barrels are annotated at the end of the
narratives (two in 2004, one in 2005, and four in
2006).
** 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 base fluid used in SBM’s are less toxic to the marine
environment and have the potential to biodegrade. Only the synthetic
base fluids are counted as pollution. SBM's were first
introduced in the Gulf of Mexico around 1999. Petroleum
oil-based muds (OBM's) were the predominant muds prior to this time
(generally with diesel or mineral oil as the base), and are still
used outside of deepwater.
S
In
1997,
163 bbls of Federal OCS
production (from Platform Irene)
spilled as a result of a pipeline failure in State
waters
1 Number of spill events with
total spillage of 50 bbl or more. Column does not add because spills
include multi-product spills where no individual product was 50 bbl
or more, and spills which involved the loss of 50 bbl each or more
of two or more individual
products.
SOURCE:
TIMS & MMS Spill Database
as of 3-September-2009
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MMS tracks spills
which occur on Federal leases in OCS waters, the submerged lands, subsoil,
and seabed, lying between the seaward extent of the States' jurisdiction and
the seaward extent of Federal
jurisdiction (see spills above). The MMS does not
maintain comprehensive data on spills which have occurred in the State's
jurisdiction. However, in recent years, MMS occasionally has collected
information on State pollution incidents.
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