Case History: BSR-3113-Barium Sulfate Scale Remover(1)
Date: April 17, 2013
Customer: Major Independent with subject well located in the Gulf of Mexico
Pertinent Well Data:
Formation: J-1 & J-2 Sands: J-3 & J-4 Sands Perfs: 14,196’-14,276’; 14,320’-14,341’
Tubing: 3 1/2” 12.7# Casing: 7 5/8” 45.3#
Other Data: Bottom Hole Temperature 230˚F
Scale was collected from a downhome source and it was determined to be barium sulfate scale. Oil/water samples were collected, screened and analyzed. FeS was in high concentrations and carbonate scaling tendencies were high.
Production Estimates Prior to Last Work-over:
Gas: 598 MCFD Oil: 300 BOPD Water: 350 BWPD
Production Estimates After Work-over: not given
Gas: 2500 MCFD Oil: 1200 BOPD Water: 450 BWPD
Recommendations & Procedure: [testing recommended prior to all jobs]
MGM Northstar was awarded the opportunity to evaluate the well situation and provide the proper stimulation system for clean-up. MGM Northstar recommended using BSR-3113 a barium sulfate scale remover, providing three different mechanisms of BaSO4 removal. BSR-3113 dissolves BaSO4 at a 0.25 lb/gallon removal rate. BSR-3113 is also an excellent product for complete CaSO4 removal, the lattice that cements barium sulfate in place. BSR-3113 is safe to use on wells that have Resin Coated Sand present. A sonic tool was used in the procedure.
MGM Northstar provided and pumped the following system as outlined below:
- Rig-Up pump truck to tubing.
- Pump 460 gallons BSR-3113.
- Flush with treated 2%KCL to top perf.
- Shut in for 24 hours.
*Shut-in times of 24 hours or longer is recommended.
- Swab back load plus 25 bbls.
- Pump 2,550 gallons 15% HCL Specialty Acid System
- Flush with treated 2% KCL to bottom perf plus 15 bbls
- Soak 1 hour.
- Swab back load plus 20 bbls
- Pump 275 gallons Scale Inhibitor in 75 bbl squeeze pill.
- Shut-in 24 hours
The return waters were clean of scale when screened. After a 4 month test, the well had sustained results credited to the clean-up and squeeze. The 230 ˚F bottom hole temp assisted in the success of the treatment.