Gas inject ion

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There comes a point in the life-cycle of any oil reserve when primary recovery
can no longer be undertaken due to natural gas depletion. Extra compression is
required to force the oil to the surface in a process known as secondary recovery.
Gas injection is one such form of secondary (or tertiary) recovery. Two or more
wells are employed where at least one is required for the sole purpose of
injecting gas into the reservoir.
Denser oil from the depths of the reservoir is displaced towards the bores of the
producing wells. The process can occur thousands of feet underground and
therefore requires the tremendous head of pressure that a barrel compressor can
generate.




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