Go Back  The Hull Truth - Boating and Fishing Forum > BOATING FORUMS > Dockside Chat
Reload this Page >

Shell spots 10-mile oil sheen in Gulf of Mexico


Shell spots 10-mile oil sheen in Gulf of Mexico

Old 04-12-2012, 11:40 AM
Admirals Club Admiral's Club Member
Thread Starter
Join Date: Oct 2006
Posts: 2,869
Received 128 Likes on 78 Posts
Default Shell spots 10-mile oil sheen in Gulf of Mexico


No need to worry the oil company taking care of it.
Old 04-12-2012, 03:34 PM
Senior MemberCaptains Club Member
Join Date: May 2004
Location: Vero Beach, FL
Posts: 2,021
Likes: 0
Received 377 Likes on 160 Posts

We were flying aerial surveys out of Venice in the summer of 2011 (the year after the spill). Three separate times we saw, photographed, and documented oil slicks and sheens several miles long. We reported all three to the CG office, who basically yawned in our faces and said, Oh yeah, you get those little (!) slicks all the time.

But if you spill 3 drops of diesel at the fuel dock, they will come down on you like a ton of bricks. But for the industry, anything under 50 barrels is a non-event.
Old 04-12-2012, 05:12 PM
Senior MemberCaptains Club MemberPLEDGER
Join Date: Sep 2004
Location: Poquoson, VA
Posts: 4,236
Likes: 0
Received 48 Likes on 20 Posts

Only about 240 gallons, obviously a bilge pump out or something.

Natural seepage in the GOM is ~ 65,000 gallons per year....
Old 04-13-2012, 10:06 AM
Admirals Club Admiral's Club Member
Join Date: May 2009
Location: Mobile, Al.
Posts: 2,309
Received 378 Likes on 234 Posts

Natural seepage a year into the GOM is around 140,000 tons a year. That is the entire GOM. Most all calculations use the metric ton as a standard when it comes to oil. If it is mostly light crude (sweet crude), you are looking at about 7 pounds per gallon. So, 140,000 m/tons X 2200 lbs (1 metric ton)= 308,000,000 lbs per year. 308,000,000/7 (weight of 1 gallon of crude) = 44,000,000 gallons/42 gallons (1 barrel is 42 gallons) = 1,047,619 barrels and some change....

This occurs naturally....

Commercial enterprises (Earth Satellite Corporation
and Unocal Corporation) compiled SAR and other
remote sensing data. With the Earth Satellite dataset,
Mitchell et al. (1999) estimated, during an aggregate
survey of the northern Gulf of Mexico, approximately
1,000 km2 of floating oil, presumably from natural
seeps. Assuming an average oil thickness of 0.1 lm,
MacDonald et al. (1993) calculated that 1 km2 of oiled
surface contains about 100 l oil. If the oil persists on
the surface for 12 h (before evaporating or spreading to
a thickness of less than 0.1 lm), summing over the time
the oil slicks are visible results in an estimate of
73,000 t per year for the northern Gulf of Mexico. This
value does not include the oil seeping from the prolific
Campeche Basin offshore from Mexico in the southern
Gulf of Mexico. Assuming the seep scales are proportional
to the surface area, a seep rate for the entire gulf
is about double the northern gulf estimate, giving a
total Gulf of Mexico seep rate of about 140,000 t per

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.