After a frac job has been performed, the well must be cleaned out to remove any proppant remaining in the wellbore. Using coiled tubing (CT), or continuous tubing as it is sometimes called, is an excellent way to get the well cleaned up in an underbalanced condition and ready to go on production.
Coiled tubing, although generally more expensive in Russia than other cleanout methods, provides a number of advantages for achieving improved well productivity. Using nitrogen mixed with brine, the well can be cleaned out in an underbalanced state, which improves solids removal and reduces formation damage. Afterwards, the well can also be lifted using only nitroge...
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