Mark 2033 on your calendar. That's when the TengizChevron lease expires. Chevron is already working on renewing. If they do renew, it will not be the incredible deal they got back in 1993. In 1993, Kazakhstan had just left the Soviet Union and were "naive". The incredible terms carried Chevron through some rough times and bumbling leadership. Next time will be a lot less lucrative.
How important is Tengiz to Chevron? If production stopped or faltered for more than 24 hours, , the TCO Operations Manager would get a phone call from the second in command.
I expect all this job trimming going on right now is CVX realizing they won't be in business eight years from now.