Chevron disclosed late Monday that the Floatec-designed Big Foot tension-leg platform would miss its late 2015 first oil target after unspecified damage was discovered over the weekend to its subsea installation tendons, several of which "lost buoyancy" and sank to the ocean floor.

The problem was evident in six of the 16 tendons used to connect the facility to the seafloor, and will likely cause a considerable delay.

"Assuming