Natural oil seepage isn't new, nor does it require satellites to detect.

"OIL AND GAS SEEPAGE FROM OCEAN FLOOR REDUCED BY OIL PRODUCTION

November 18, 1999

(Santa Barbara, Calif.) Next time you step on a glob of tar on a beach in Santa Barbara County, you can thank the oil companies that it isn't a bigger glob.

The same is true around the world, on other beaches where off-shore oil drilling occurs, say scientists, although Santa Barbara's oil seeps are thought to be among the leakiest.
...
In addition, a 50 percent reduction in seepage from the La Goleta seep would remove about 25 barrels of oil per day from the sea surface, which in turn would result in a 15 percent reduction in the amount of tar found on Santa Barbara beaches." "
http://www.ia.ucsb.edu/pa/display.aspx?pkey=412

So, 25 barrels is 15% about 165 barrels per day. So let's guess that without interfere from humans the area might make around 200 barrels per day. Which is about 73000 barrels per year and about 3/4 million barrels per decade.

A supertanker:
The world's largest supertanker ever was built in 1979 at the Oppama Shipyard of Sumitomo Heavy Industries, Ltd. as the Seawise Giant. This ship was built with a capacity of 564,763 DWT
...
As of 2008, the worlds four largest working supertankers are the TI class supertankers , currently known as the TI Asia, TI Europe, TI Oceania, and TI Africa
...
Each of the four sister ships has a capacity of over 441,500 DWT, a length overall of 380.0 metres (1,247 ft) and a cargo capacity of 3,166,353 barrels...

So the most a supertanker could possible spill is about 3 million barrels.

Biggest oil spills in history:
"The Exxon Valdez, the tanker responsible for the worst oil spill in American history, has come back into the news this week, as the Supreme Court finally decides the price that Exxon will pay for ruining the fishing industry in Alaska. But it will likely surprise you to know that the Valdez spill was actually only the 34th largest oil spill in history.
...
The Valdez spilled 10 million gallons off the coast of Alaska, the smallest spill in the top ten was four times larger. :
Kuwait - 1991 - 520 million gallons
Mexico - 1980 - 100 million gallons
Trinidad and Tobago - 1979 - 90 million
Russia - 1994 - 84 million gallons"
Etc.
http://envirowonk.com/content/view/68/1/

There are 42 gallons per barrel.
So Valdez spilled about 238,000 barrels or more than 3 years of crude oil that naturally seeps from Santa Barbara.
Or there is about a Valdez spill every 3 or 4 year for last few thousand years.
And the environmental wackos don't want to do anything to prevent this from happening "naturally".

And though the oil seepage from Santa Barbara County is well known and very noticeable, there is probably more than 10 times this amount occuring globally. Or at least nature is doing a "Valdez" every year- if we assume the Santa Barbara area is truly extraordinary.