the test well was flowing 57 barrels of oil per day with 120 psi flowing casing pressure on a 9 64 inch choke and pumping 1900 barrels of water per day from the water drainage perforations after the system stabilized for several months the water production was lowered without causing any water breakthrough into the oil perforations the producing water oil ratio was 33 1 a comparison of oil production rates between the completion of this invention and three existing conventional completions is illustrated in fig7 which plots the monthly barrels of oil per day average of the payout 46 of the new completion well 40 and well payouts 47 48 and 49 of conventional wells nos 1 2 and 3 versus initial potential and subsequent months the three conventional wells represented in the graph as nos 1 3 were drilled in 1989 and encountered equal or greater oil column as compared to the well 40 as is typical with wells in this sand all three conventional completions declined during their first two years of production as water coned into the oil perforations in contrast the new completion method of this invention produced more than the initial rate even after 17 months of production in the well 40 in another preferred embodiment of the invention and referring.