Polymers Reduce Water Production
Case History
Douglas Sand - Barber County, Kansas
Problem
Operator perforated Douglas Sand @ 3400-3406. Well swab tested 50 barrels of water per hour. Shut in tubing pressure 950#. Well put on pump for 600 BWPD, 100 Mcf gas (declining). Operator determined water-coning from below Douglas formation, near wellbore, poor cement bond or vertical fracture out of zone.
Solution
Polymer Services, LLC designed a multi-stage high density polymer gel treatment to seal the near wellbore channel, with minimal damage to the gas productive interval. A total treatment volume of 75 bbl HDLV polymer gellant was pumped, followed by 60 bbl condensate. The well was shut in 5 days to allow maximum development of gel strength.
Result
Initial production was 250 Mcf Gas, and 200 BWPD. The water depleted to 50 BWPD, and the gas increased to 600 mcf, one month after treatment. After 18 months, production has stabilized at 300 Mcf, with minimal water production
Case History
Harzman 2-17 Beckham County, Oklahoma
Casting: 5 ‡" @ 12,000' TUBING: 2 7/8" @ 11,600
Perforations: 11,670-11,743' and 11,752-11,771' (92' overall)
Formation: Granite Wash
Temperature: 206 degrees @ 11,724'
Salinity: 35,000 ppm
Porosity: 8%
Initial Production: 1 million cfd Well was shut in prior to polymer treatment. No Production. 19-foot interval from 11,664 - 11,685' was producing 78% for the water. Am in-situ polymer gellation treatment was designed for this well, using a modified polyacrylamide chromium-redox system. The recommended treatment procedure is as follows:
- Packer set @ 11,640' to isolate zone for treatment.
- Pump 80 BBL 2% LCl preflush with 5 gal. XC-302.
- Pump 300 BBL PERMBLOK I delayed crosslink polymer system.
- Pump 100 BBL clean-lease crude with 5 gal. LCI to re-establish hydrocarbon permeability.
- Shut well in 48 hours to allow maximum development of gel strength.
- Place well back on production. Well is currently producing 800,000 cfd, after 6 months.
Estimated treatment cost: $22,495.00
Polymer Services, LLC is experienced and committed to developing cost-effective, innovative solutions to all kinds of water management and control problems. If you think you may have an application, give us a call at 1-800-625-3791.
Case History
(Hunton formation Woods County, Oklahoma)
Problem
Well was shut in due to water coning/loading up.
IP had been 120 MCF.
Solution
Polymer gel treatment 425BBL HE-100
Displaced to clear perforations with condensate.
Return well to production after 72 hour shut in time.
Result
Treatment was pumped down production tubing. No Workover Rig was required.
Production stabilized at 100 mcf gas. +10 BWPD, after 6 months.
Payout in 30 days.
