Production from all four wells flowing to Royal Dutch Shell plc's Brutus tension-leg platform in the Gulf of Mexico were shut-in after a 13-mile oil sheen was spotted almost 100 miles south of Port Fourchon, LA. The total release was small, estimated at around 2,100 bbl of oil, or 88,200 gallons. Shell said the sheen was observed near its Glider field, a group of four subsea wells in Green Canyon Block 248. No drilling activities were taking place at the time, Shell said. Production from the wells flows through a subsea manifold to Brutus, which is in 2,900 feet of water. Brutus, 165 miles southwest of New Orleans, began production in 2001 (see Daily GPIAug. 16, 2001). The Department of Interior's Bureau of Safety and Environmental Enforcement is leading an incident investigation. No injuries were reported and no evacuations were made from the platform, which is designed to house up to 94 people. The Marine Spill Response Corp. and Clean Gulf Associates were contracted by Shell to conduct cleanup and containment work.