Example Wells from Database
Three example wells will be discussed in this section. Wells were selected to illustrate the range of how different wells have responded to gel polymer treatments. Information discussed on these example wells is the type of data available on a larger number of wells in the online database.

Example of a Nice Initial Response with Above Average Incremental Oil Recovery
The Johnson B #3A is located in the SE SW SW of Section 29-T11S-R18W in Ellis County, Kansas. This well is in the Bemis-Shutts Field. Casing is set at 3718 ft. and perforated from 3526-3533 and 3576-3580. It was treated in August of 2001 by TIORCO using the MARCIT^SM system. The pre-polymer acid job was 250 gal followed by 1621 barrels of polymer. The treatment consisted of 118 bbls at 3500 ppm, 1001 bbls at 4000 ppm and 502 bbls at 5000 ppm. The treatment was overflushed with 80 bbls of oil. The maximum surface treating pressure was 51 psi and 97% (1578 bbls) of the treatment was at a vacuum at the surface. The average injection rate was 1025 bbls per day.

Prior to the treatment this well was producing 2 BOPD and 677 BWPD with a producing fluid level of 834 ft. above the perforations. The well was shut-in for 10 days following the treatment and returned to production. The initial production following the treatment was 116 BOPD and 62 BWPD. One month later the well was producing 43 BOPD and 130 BWPD. Six months following the treatment it was producing 14.5 BOPD and 147 BWPD. The producing fluid level following the treatment was approximately 200 ft. above the perforations. This well has produced approximately 8532 bbls of incremental oil to date as a result of the treatment. There were no artificial lift equipment changes on this well. Figure 2 is a plot illustrating production from this well.

Figure 2: Example of a Nice Initial Response with Above Average Incremental Oil Recovery

Example of Average Response
The Peavey A-6 is located in the NW SW of Section 13-T11S-R18W in Ellis County, Kansas. This well is in the Bemis-Shutts Field. Casing is set at 3342 ft. and it is an open-hole completion from 3342-3346. It was treated in August of 2001 by TIORCO using the MARCIT^SM system. The pre-treatment acid job was 250 gal followed by 3806 barrels of polymer. The treatment consisted of 897 bbls at 3500ppm, 1251 bbls at 4000 ppm, 1254 bbls at 5000 ppm and 404 bbls at 6000 ppm. The treatment was overflushed with 80 bbls of oil. The maximum surface treating pressure was 446 psi and 64% (2433 bbls) of the treatment was on a vacuum at the surface. The average injection rate was 1050 bbls per day.

Prior to the treatment this well was producing 11 BOPD and 1056 BWPD, the producing fluid level was not reported. The well was shut in for 7 days and returned to production. The initial production following the treatment was 22 BOPD and 162 BWPD. One month later the well was producing 27 BOPD and 153 BWPD. Six months following the treatment it was producing 21 BOPD and 192 BWPD. The producing fluid level following the treatment was approximately 1253 ft. above the perforations. This well produced approximately 4952 bbls of incremental oil as a result of the treatment. The artificial lift changes were the pumping unit was speeded up and a larger bottom-hole pump was installed early in 2002. Figure 3 is a plot illustrating production from this well.

Figure 3: Example of Average Response

Example of Poorer Response
The Colahan A #41 is located in the C W/2 NE of Section 24-T11S-R17W in Ellis County, Kansas. This well is in the Bemis-Shutts Field. Casing is set at 3389 ft. and perforated from 3386-3389 and also has open-hole from 3389-3390.5. It was treated in August of 2001 by TIORCO using the MARCIT^SM system. The pre-treatment acid job was 500 gal followed by 2988 barrels of polymer. The treatment consisted of 897 bbls at 3500 ppm, 1394 at 4000ppm, 602 at 5000 ppm and 95 bbls at 6000 ppm. The treatment was overflushed with 80 barrels of oil. The maximum surface treating pressure was 923 psi and 8% (245 bbls) of the treatment was on a vacuum at the surface. The average injection rate was 850 bbls per day.

Prior to the treatment this well was producing 3 BOPD and 500 BWPD with a producing fluid level of 2016 ft above the perforations. The well was shut-in for 7 days and returned to production. The initial production following the treatment was 34 BOPD and 52 BWPD. One month later the well was producing 21 BOPD and 46 BWPD. Six months following the treatment it was producing 10 BOPD and 48 BWPD. The producing fluid level following the treatment was approximately 100 ft. above the perforations. This well produced approximately 1474 bbls of incremental oil as a result of this treatment. The artificial lift change was a larger bottom-hole pump was installed in December 2001. Figure 4 is a plot illustrating production from this well.

Figure 4: Example of Poorer Response