IN THE MISSOURI CITY AIR 
Wild West Well Control is expected to finish capping an oil well this evening on McHard Rd. just west of the Fort Bend Tollway that blew out last night, sending foul-smelling fumes southeast into Fort Bend County. Nearby residents got a nose-ful: “Winds carried the smell across a large portion of the area; it is believed that the smell was from hydrogen sulfide. Total Fire has been conducting air monitoring in the area and has been unable to detect significant amounts of the chemical in the air.” [Fort Bend County OEM]
Photo: Fort Bend County OEM
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I have no association with this well but it wasn’t a hydrogen sulfide smell. That is an odorless, deadly poisonous gas. It was probably mercaptans.
H2S is not odorless, it smells like rotten eggs.