Chevron has announced plans to shift its deepwater Big Foot tension-leg platform (TLP) from its existing location in the US Gulf of Mexico to more sheltered waters due to a damage caused to subsea installation tendons.

The start of production will be delayed at the platform as a result of the movement.

According to the US-based energy company, of the various tendons that have been pre-installed in preparation for connection to the platform, some lost buoyancy between 29 May and 31 May.

"Chevron said it is in the process of assessing the damage caused to the tendons."

At the time when the accident took place, the Big Foot TLP was not connected to any subsea wells or tendons and escaped any damaged.

The incident did not cause any injuries and no fluids leaked into the environment.

Chevron said it is in the process of assessing the damage caused to the tendons.

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The tendons, which are not connected to subsea wells, are used to attach the TLP to the seafloor.

Situated on the Walker Ridge block 29 about 362km south of New Orleans, the Big Foot oilfield is operated by Chevron with a 60% interest.

The remaining partners comprise Statoil with 27.5% and Marubeni Oil & Gas with 12.5%.

The field was discovered by the company in 2006 by the Big Foot No 2 well and lies at a water depth of 1,500m.