Case History: FDR-1100 (Formation Damage Removal) with PA-100 (Co-Solvent) with 5% HCL


Date: -


Customer: Independent with subject well located in San Patricio County Texas

Pertinent Well Data:  Hunter 11R  

Formation: Unknown                                                                        Perfs: 4852’-4860’            

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

Other Data:          Bottom Hole Temperature @ 140˚F

Problem:

The well would not flow. MGM Northstar recommended using FDR-1100 which is an organic acid mixed with an anionic surfactant package which is low in pH and is designed to penetrate and disperse light hydrocarbons and fines. PA-100 Series is used in the dispersion, penetration, and removal of paraffin/asphaltene deposits, and heavy hydrocarbon based sludge. BC-20 is an effective, low cost, antimicrobial agent for use in oilfield applications such as stimulation and fracturing fluids, drilling muds, work over or completion fluids, water treatment and water flood applications.

Production Estimates Prior to Last Work-over:

Gas:  .5 MCFD                       Oil:  Trace BOPD                   Water:  15 BWPD

Production Estimates After Work-over:

Gas: .75 MCFD                      Oil:  25 BOPD                        Water:  3.5 BWPD

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

MGM Northstar provided the following system as outlined below:

  1. Treated down annulus with the following:
    1. 1200 gallons 2% KCL + MS-100 + Biocide Spearhead
    2. 2000 gallons 5% HCL +  FDR-1100/PA-100 + additives
    3. Over-Flushed with 100 Barrels  2% KCL + MS-100 + Biocide

*Shut-in times of 12 hour.

Results:

The well was allowed to be shut-in overnight and then swabbed in the next day. The well has been flowing at a rate of 1.2 MCFD for the last 30 days.

Summary:

FDR-1100 is an excellent carrier of fines and other insoluble left behind from previous stimulation treatments. It is also used for the removal of swollen clays that have had invasion of foreign fluids. The recommended treating volume is 50 to 100 gallons per foot of net pay. Volumes may change based on the severity of the damage and desired penetration in and into the formation. PA-100 Series can be used in 2% KCL Water or solvents as a pre-soak before stimulation treatments, such as acidizing and/or fracturing. This method is used to remove any light hydrocarbons, and to water wet the formation, thus preparing the formation face so that optimized performance can be expected from the acid and/or fracturing stimulation procedure. BC-20 is an effective, low cost, antimicrobial agent for use in oilfield applications such as stimulation and fracturing fluids, drilling muds, work over or completion fluids, water treatment and water flood applications.