I wonder if there is a way to poison an oil well, so that it becomes un-economical to purify. Chemical separation is obviously what the whole petrochemical ind

I wonder if there is a way to poison an oil well, so that it becomes un-economical to purify. Chemical separation is obviously what the whole petrochemical industry is about, so maybe something like injecting radioactive material. Then you pay the well owner to poison and seal off their well.