Gulf of Mexico Sheen Spotted, Shell Taking Proactive Measures

THE HAGUE, The Netherlands, April 12, 2012/PRNewswire-FirstCall/ -- NYSE: RDS.A)
(NYSE: RDS.B)

On April 11, Shell notified the National Response Center (NRC) of a light sheen
in the central portion of the Gulf of Mexico, between the Mars and Ursa
production area.
Shell has no current indication that the sheen originates from wells in either
the Mars or Ursa projects.
However, out of prudent caution, Shell has activated the Louisiana Responder, a
Marine Spill Response Corporation (MSRC) vessel.
The Louisiana Responder is an oil spill response vessel with skimming and boom
capabilities.
Shell has also requested flights to monitor the one by ten-mile sheen closely
with additional aerial surveillance.
At this time, the source of this sheen is unknown, and Shell's priority is to
respond proactively, safely, and in close coordination with regulatory agencies.

Updates will be provided as further action is taken.

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