Chevron may be the only GoM operator to own its helicopter fleet. Data on their safety performance relative to GoM helicopter contractors do not appear to be available online.
Their news release focuses on hurricane preparedness and the benefits of owning their fleet. I’m not sure how significant these advantages are given that other companies can ensure similar availability through their contracts. A comparative analysis would be of interest.
“Other companies that depend on contracted helicopters to evacuate can’t create their own schedule and might have to start departing the platform days in advance,” said Jose Jaramillo, manager of Chevron’s aircraft operations in the Gulf of Mexico. “With our own helicopters on standby, we have more flexibility in determining when to safely shut down the platform, and after the storm passes, we can quickly remobilize, assess our facilities and bring production back online days faster.”
Chevron.com
The Helicopter Safety Advisory Conference (HSAC) does a very good job of identifying and addressing Gulf of Mexico helicopter safety issues. Per HSAC (report attached):
The leading causes, not all inclusive, of the accidents since 1999 are listed below, and secondary causes of these events include 13 related to helideck size or design related issues.
• 21 engine related,
• 25 loss of control or improper procedures,
• 18 helideck obstacle strikes,
• 13 controlled flight into terrain, and
• 12 other technical failures
Bud's Offshore Energy (BOE) 
Hi Bud
Great service! but the link to HSAC report doesn’t work.
Cheers Jan-Erik
Thank you Jan-Erik. I have removed the link and attached the report. You can also go to http://www.hsac.org/library and click on “Statistics.” You will then have access to all of the HSAC statistical updates. Unfortunately, the 2021 update is still not posted.