What fills the void of the oil gone under our feet?

The problem that you describe is real, but it's usually small.

As one of the other people answering pointed out, the oil is not usually in a cavern, so when you pull oil out, you generally don't leave behind a big hole that will cause the land above it to collapse.

Gradual land subsidence (and, rarely, sudden collapses) can occur when water, petroleum, or other material is pumped out of the ground.

In Alviso (near San Jose, California), groundwater pumping has caused the ground to gradually sink 15 feet over a period of decades. In an area near the Dead Sea (in Israel), the imbalance between water being pulled out and water flowing back into the ground has caused sinkholes large enough to "swallow" a person.

Even slow subsidence can cause problems. As the ground shifts, pipes buried in the ground can break. In addition, the foundations of buildings may shift and the building may lean or break.

The same is true when you pull oil out of the ground. However, since we pump a lot more water than oil out of the ground, the effect of pumping out oil is usually much smaller than the effect of pumping out water. Nonetheless, the problem still occurs: National Geographic magazine points out that parts of Louisiana are subsiding due to oil pumping.

Ground subsidence or collapse is a genuine possibility, but probably not a major problem in most areas where gas and oil are pumped out of the ground.

The oil does not exist in an open void like a cavern. It exists in porus sandstone and the oil is drained from that, even with the oil gone the sandstone is still a solid.

Used to work for oil company in the drilling department

Volume gets filled by water or gas (hydrocarbon).

Well, we know why YOU believe in global warming. Did Al Gore III steal your meds?

of course not it's being filled with al gores bull!

Magma. Go look and see for yourself.

worms