Representative body Oil & Gas UK (OGUK) have released a report showing up to 30,000 jobs may be lost in the sector.
The report is based on a survey of OGUK members, and shows up to three-quarters of respondents in offshore supply chains planning to increase their work outside of oil and gas.
It also says drilling in the North Sea could be down 50% on 2019, with levels of investment falling to levels last seen in the 1970s.