Gels are used worldwide to control water co-production in gas and oil wells (WSO treatments) but the criticality of a correct placement in the Italian scenario had strongly limited their use in this Country. For instance, in gravel packed wells or in wells where the "ID casing/ID tubing" ratio is over 2.5, inflatable packers cannot be efficiently used for gel diversion; moreover, dual injection has to be usually applied with these tools, making a treatment very often too expensive and, as a result, unacceptable.
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