eric barajas has the details from louisiana. >> reporter: concern over an oil well explosion, soon gave way to relief. all 13 workers onboard were accounted for. rescued while floating in the gulf. >> all 13 members aboard the oil platform have survived with no serious injuries. >> reporter: the explosion occurred thursday morning.roducn an oil production platform located in shallow waters in the gulf ignited. >> it is a production platform and not a drilling rig. >> reporter: coast guard officials say workers were able to shut down production before evacuating the facility. the owner of the platform, mariner energy, says it has seven wells that produce oil and natural gas. officials do not know what caused the explosion. >> when we asked the specific work they were doing, they weren't able to confirm for us what their responsibilities were. >> reporter: there were reports of a mile-long oil sheen spotted near the blast site. coast guard knocked down those reports. >> coast guard helicopters on-scene and helicopters on-scene have no visible reports of a sheen on the water. >> we obvious

abc's eric barajas has the details. >> reporter: concern over an oil well explosion soon gave way to relief. all 13 workers on board were accounted for, rescued while floating in the gulf. >> all 13 members aboard the oil platform have survived with no serious injuries. >> reporter: the explosion occurred thursday morning more than 90 miles south of louisiana's vermilion bay. an oil production platform located in shallow waters of the gulf ignited. >> during an exercise, it is a production platform and not a drilling rig. >> reporter: coast guard officials said workers were able to shut down production before evacuating the facility. the owner of the platform, mariner energy, said it had seven wells that produce oil and natural gas. officials do not know what caused the explosion. >> we asked the type of specific work they were doing. they weren't able to confirm for us what exactly the responsibilities there were. >> reporter: there were initial reports of a mile-long oil sheen spotted near the blast site. the coast guard knocked down those reports. >> coast guard helicopters on-sce