According to Drilling Contractor magazine July/August 2008, Chevron drills 40% of their global footage in GOT, so regardless of whether it's oil or gas or both, the sector is dynamic and busy meaning that Helicopters will be a vital aspect of the next few years.
If Chevron is engaging in posturing as put forward in an earlier post and if it is true that SiChang/Bristow has aircraft problems then it's possible that Chevron are simply going through the motions.
As a member of the bottom feeding pondscum it matters little who gets the contract. If the incumbents lost the contract but keep their guys and move them to other jobs they will be sorted and if the new guys hire them on instead, they will still have jobs and all it will mean is a different colour tent is erected and the circus plays on.