I understand that you can't simply stop extracting, but as long as you're allowed to own oil and not drill it you should be fine. If you're having cash flow problems, you can sell the land.
Are there enough "use it or lose it" mineral rights problems to mess with the market?
A lot of the world's oil rights are held by unstable and/or autocratic regimes, who might well prefer to have the wealth in more liquid form.
What is something you used to believe, preferably something concrete with direct or implied predictions, that you now know was dead wrong. Was your belief rational given what you knew and could know back then, or was it irrational, and why?
Edit: I feel like some of these are getting a bit glib and political. Please try to explain what false assumptions or biases were underlying your beliefs - be introspective - this is LW after all.