Some salt solution mines consist of a single
well with concentric casings extending into
the salt cavern. Others consist of several
adjacent wells extending into a single large
cavern.
Brine is withdrawn either through the outer
concentric casing in a single well cavern, or
through a separate casing in a multiple well
salt cavern. The size and shape of solution
mined caverns canbe measured and
controlled with well logging devices and
operating techniques, thus minimizingthe
potential for surface subsidence. After the end
of use for salt or chemical production,
solution-mined salt caverns are often used to
store petroleum or other products.