Kuwait Oil Company(KOC)'s massive expensive efforts, to control extraneous source water invasion, by casing repair in multireservoir ageing wells particularly run by electrical submersible pump(ESP), is not paying expected dividend. To achieve negative casing integrity is a challenge in ageing wells and achievable negative casing integrity is very low (300-900 psi) which does not sustain against ESP's high drawdown (1000-4500 psi) which has been established from workover data accumulated over a prolonged period reveals leakage from previous squeezed zones, corroded/weak casing and liner top. The leakages are refixed with multiple cement squeezes with available recipes. spending a staggering repair cost of $0.5 million USD/well on an average. But after a short span of the potential productive life of the reservoir, significant water production starts from extraneous sources evident from intake pressure and flow rate variation from the reservoir potential, thereby necessitates intervention. This cycle of casing repair and failure of casing integrity goes on involving high magnitude of recurring losses incurs on establishing casing integrity, unsustainable production and excess water handling. Besides, economically unrepairable wells are forced to compromise on production by reducing casing size to avoid abandoning/drilling fresh wells. Such unsustainable production scenario, likely to affect KOC's 2020 target, highlightens the desperate need to have the solution.An innovative completion solution to mitigate this potentially catastrophic issue will be presented and the paper will discuss the details of the tools, equipment adopted to achieve the objective.Apart from expected huge saving of over $ 21 million USD/anum to KOC this innovative completion solution will definitely benefit the industry in dealing with the issues of ageing wells.
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