We've just processed an Envisat ASAR radar image of the Campos Basin that was taken on November 25. As expected, it shows a much smaller apparent oil slick originating from the location of the SEDCO 706 drilling rig, operated for Chevron by Transocean, than we observed back on November 12:
|Envisat ASAR satellite radar image taken November 25, 2011. Slicks are dark streaks and patches. Location of SEDCO 706 drill rig is marked. Image courtesy European Space Agency.|
Surface wind speed over the leak site was good, about 5-15 knots (3-8 meters/sec), blowing from the north-northeast. A very narrow slick about 120 meters wide and 50 kilometers long extends south from the rig location, covering about 6 square kilometers. Assuming the slick is 1 micron thick, we estimate it holds about 1,584 gallons (38 barrels) of oil.