This paper details extensive laboratory testing of a new and promising relative permeability modifier (RPM) performed using core samples from different sandstone and carbonate cores. Laboratory test results indicated significant decreases in effective water permeability, whilst effective oil or gas permeabilities were largely unchanged. Results of tests conducted with various formation cores, and under varying conditions of temperature, differential flow pressures and rates, and treatment design are detailed. Discussion on observed phenomena such as treatment effectiveness at increasing permeabilities and stability of selective water permeability reduction relative to oil or gas permeability at increasing differential flow pressures. First field applications worldwide, including West Africa and the U.S. are detailed and results analyzed. In addition to applications as a relative permeability modifier, an application as a water control additive in fracturing fluids is also investigated and field results from an initial application in this area are presented.

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