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In the oil industry, a "bottom kill" is a procedure used to permanently seal a leaking well. This method involves pumping cement through a relief well that runs parallel to and eventually intersects the original well. This technique was successfully employed to seal the Deepwater Horizon oil spill in September 2010, after other methods like a "top kill" failed. "Bottom water," on the other hand, refers to the water located directly beneath oil or gas in productive formations.12

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