God's purpose

I heard a Christian ask the question "What purpose did God have in mind for all that petroleum buried in the Gulf of Mexico? There must be a reason."

That got me to wondering what the Intelligent Designerists would say to that. Did the Intelligent Designer put all that crude down there so BP could turn it loose in the ocean? Did the big guy need that oil to lubricate the bearings the Earth spins on? Did the IDer need it so he could invent oil companies?

Do all minerals have a purpose?

Is the DI listening? Inquiring minds want to know.