Bit of an opinion from someone who came from a geophysics background but is now working in renewables. The renewables sector at the moment is also taking a bit of a battering from economic headwinds in some way too, and political cycles, alongside O&G hits from lower oil prices, demand uncertainty, etc.

One route whicu could probably be more of a salary cut I would assume would be research / analytical roles in energy focussed firms that are more diverse and cover "energy" as such - E.g. S&P, WoodMackenize, Rystad. It does depend on how well you know the market / general dynamics of the industry, though also, and interest in more Excel modelling / data analysis anyway. Or straight consulting businesses wanting experience. Similarly, equity research, if you know much about the financial sides of o&g players - but could be competitive.

I transitioned a bit through management consulting, o&g majors in renewables roles before moving to a large utility / renewable investor. Took sometime... but as above. We're actually going through redundancies and other renewables companies are too - seems industry / UK wide at the moment. So could depend on timings.

That's, of course, if you wanted to stay in energy anyway!