[ghostrider]

I am not sure, but my guess is that means it will collapse into the area the oil is in and start more and bigger leaks. But I’m just guessing.

I am no expert in this area, but I have read a lot of what experts say. Your guess may be correct. Some of the petroleum engineers have long been concerned that the hydraulic effect of a subterranean leak in the well bore could router out the sand deposits, "soft" rock and/or salt domes and provide a volcanic like path to the pressurized oil pool. I think it is like hydraulic mining where they use high pressure water hoses to router way earthen banks to expose minerals.

[brytlea]

Thank you for a more detailed explanation. That makes sense.