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TABLE 4.1 <br /> NCPA Lodi STIG#1 <br /> Cleanout and Production by Nitrogen Lift <br /> 15-May-93 <br /> Average Cumulative <br /> Coil Tbg Nitrogen Tbg Head Wtr Prod Water <br /> Depth Rate Pressure Rate* Produced** <br /> Time (ft KB) (scfm) (psig) (gpm) (gallons) Comments <br /> 16:20 4585 400 81 20,160 <br /> 17:30 4585 370 200 92 26,628 Very little sand <br /> 4585 Steady prod rate <br /> 18:15 4585 370 200 30,198 Clear wtr,no sand <br /> 18:40 4585 370 200 89 32,886 Clear wtr, no sand <br /> 18:42 4585 370 33,390 Clear wtr,no sand <br /> 19:31 4585 370 105 38,220 Clear wtr,no sand <br /> 20:00 4585 370 200 Clear wtr, no sand <br /> 20:20 4585 370 200 75 41,874 Clear wtr, no sand <br /> 21:30 4585 370 175 90 48,174 Clear wtr,no sand <br /> 22:00 4585 370 Shut off N2. Start POH. <br /> 22:22 0 100 <br /> 22:30 0 90 <br /> 22:36 0 100 <br /> 22:38 0 250 <br /> 22:41 0 70 <br /> 22:43 0 30 <br /> 22:50 0 Well almost dead <br /> 23:00 0 0 90 56,280 Shut in well <br /> Average water production rate between tank gaugings. Some fluctuations in the production rate values are <br /> attributable to the fact that variations in the volume of water in the rig's mud tank were not accounted for. <br /> `*Cumulative volume of water produced based on gaugings of 500-bbl tanks. <br /> Page 2 of 2 -9 <br />