A selective water control process that can control water production has been developed. This process incorporates small particle size cement (SPSC) in an oil-based slurry containing a surfactant. The system allows high concentrations of SPSC in the oil and retards the SPSC reaction with water to allow deep penetration into high permeability microchannels and fractures to shut off water. The slurry will set only if it contacts mobile water and therefore provides an excellent water control treatment.

The selective water control process has been used in conjunction with polymers crosslinked by metal crosslinkers to obtain reduction of water without the problems associated with crosslinked polymer, i.e., polymer production with accompanying corrosion and bacteria problems. This paper demonstrates the application of the selective water control process in various types of formations, ranging from sandstone to fractured limestone, dolomite, and chert. Field case histories of the process are presented for perforated and openhole completions.

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