Water shutoff through fullbore placement of polymer gel in faulted and in hydraulically fractured producers of the prudhoe bay field

摘要

Selective shoutoff of undesired water influx by nonselective (fullbore) placement of treating chemicals has been successfully demonstreated in production wells of teh Prudhoe Bay field. This was accomplished through: (1) careful choice of candidates with known high conductivity water influx pathways (fault, hydraulic fracture, thief), (2) placement that exploited conductivity differences without zonal isolation, and (3) use of established polymer gel chemistry with previously demonstrated ability to shut off water preferentially to oil.