The Big Foot platform. Image courtesy of Chevron.

Chevron is continuing to monitor the offshore Big Foot tension leg platform after several of the unit’s tendons lost buoyancy earlier this month.

The company told Rigzone that nine of the platform’s tendons lost buoyancy and sunk between May 29 and June 4 and it is now monitoring the remaining seven tendons.

The $5.1 billion platform was not connected to any wells when the incident occurred and no spills were reported.

The company deployed four remotely operated vehicle to monitor and asses activities on the platform along with thirteen marine vessels to support response operations, Rigzone said.

No timeline for repairing the tendons has been released yet.

The platform was not damaged during the incident.

Chevron is coordinating activities for the platform from a command center in Houston with the help of a U.S. Coast Guard representative who is serving as a liaison at the center.

The 16 tendons are used to attach Big Foot to the seafloor and are not connected to subsea wells.

There are currently no producing wells at Big Foot.

Chevron said earlier this month that the platform will be moved to sheltered waters from its location in the deepwater U.S. Gulf of Mexico.

The company had planned to turn on the tap at the Big Foot field later this year but production is now expected to kick off sometime next year.

The Big Foot platform has a production capacity of 75,000 barrels per day of oil and 25 million cubic feet per day of natural gas.

The Big Foot field is located in the U.S. Gulf of Mexico, about 225 miles south of New Orleans in water depths of about 5,200 feet.

Discovered in 2006, Big Foot sits in the Walker Ridge Area and holds estimated total recoverable resources in excess of 200 million oil equivalent barrels.


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