Does pumping oil out of the ground leave caves and holes underground?

[pureoilrecovery]

I am newbie here. I'm curious, does pumping oil out of the earth leave chasms, caves or holes under the earth? I've heard before that the oil is tightly squeezed between rocks, mixed with sand, etc., however...if this is true then why are the scientists in the gulf of Mexico describing a sea floor collapse? Some of the news stories are saying that giant chasms are opening up underground where the mass amounts of oil are flowing out unrestricted. And, if groundwater or sea water is replacing the oil being taken out by oil rigs across the earth, then why don't we see a MASSIVE amount of water levels dropping? Billions of gallons of oil are being pumped out each day...what's replacing that?

[The Deacon]

Personally, I prefer my SPAM greasy, not oily.

[eric m.]

:rolleyes:

[KNaB]

Wow! Stealth spam in the OT forum.