no injection wells exist the well is a cased hole cemented completion with perforations in a 3 meter zone of 6 shots per foot production was initially 1100 barrels per day bpd of liquid and the water cut was 15 with a wor of 0 17 production dropped to about 800 bpd of oil and 200 bpd of brine wor 0 25 after two years of production when the water cut increased to 70 and total liquids dropped to 600 bpd over a month 39 s time for a wor of 2 33 a treatment to control the water production and lower the wor is designed a brine containing 20 wt sodium chloride and with an average ppg concentration of 0 4 vol is injected for thirteen hours at a rate of 1030 bpd the ppg concentration varied from a beginning concentration of 1 2 vol to a final concentration of 0 2 vol and is followed by an overflush of 60 barrels of freshwater containing an rpm at 0 25 wt in the first 50 barrels and just fresh water in the last ten barrels the ppg is injected into the water stream entering the tubing by using a slurry of the ppg in a mineral oil.