• The Environment

    What Fills the Space Left in Wells When Oil is Extracted From the Ground?

    By Paul Adams Posted on 11.3.2008 4 Comments

    You might guess that magma or tumbling rocks fill the void, but the truth is much more prosaic: water. Petroleum deposits, which are naturally mixed with water and gas, lie thousands of feet below the earth’s surface in layers of porous rock, typically sandstone or limestone. (Contrary to what you might imagine, drilling for oil is more like sucking oil from a sponge with a straw than from a giant pool of liquid.)


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