Case History: FDR-1100 (Formation Damager Removal) and ISR-1100 (Iron Sulfide Removal) with nitrogen


Date: April 24, 2013


Customer: Major Independent with subject well located in Refugio County Texas

Pertinent Well Data:

                Formation: Wilcox (Sandstone)                                                      Perfs:     Not Known

                Tubing: 2-3/8”    Casing: 5-1/2”

Other Data:          Bottom Hole Temperature ___˚F

Problem:

The well had lost production due to scale and iron sulfide build-up and was shut in. MGM Northstar recommended using FDR-1100 a blend of non-ionic and anionic packaged in a low PH fluid. Which deliveries a superior water wetting characteristics in both carbonate and sandstone formation. ISR-1100 Series is an anionic surfactant package that is low in pH and is designed to break iron sulfide down into small particulates, making for easier removal when flowing back.

Production Estimates Prior to Last Work-over:

Gas: 0 MCFD             Oil: 0 BOPD                           Water:  0 BWPD

 Production Estimates After Work-over:

Gas:  75 MCFD                      Oil:  3 BOPD              Water:  6 BWPD

Recommendations & Procedure: [testing recommended prior to all jobs]

MGM Northstar provided and pumped the following system as outlined below:

  1. Treated down tubing with nitrogen
  2. Flushed with 5 bbls of 3% KCL with nitrogen
  3. Displace with nitrogen

*Shut-in times of 1 hour.

Results:

The well started to make gas, oil and water.

Summary:

The FDR-1100, is an excellent carrier of fines and other insoluble left behind.