History:

The Whetsel #1 SWD holding water tank  had 5' of BS&W, with a very hard pad.

Prior to Bio Tech's treatment program, the operator used continuous chemical treatments with little to no results. 

Bio Tech, Inc. retrieved baseline water samples for treatment recommendation.  Millipore Filtration Analysis, Water Analysis, Filtration Solids Analysis, and Oil In Water analyses were performed on the samples.

Microbial Treatment Program: 

Bio Tech recommended BS&W, corrosion, and oil carryover treatments with the following goals in mind: 

• Reduce BS&W
• Soften, then remediate hard pad
• Reduce oil carryover
• Improve water quality and injectivity
• Reduce the frequency of acid jobs

Bio Tech initiated the following microbial treatment program at the tank:

Treatment began with an initial batch treatment of twice the normal application to establish the microbial colonies.  Subsequent bi-monthly batch treatments are also detailed in the table below:

Performance Monitoring

In order to monitor the performance of Bio Tech's treatment design, the following monitoring program was implemented:

Injection Water Quality

During the project phase, testing is performed on a monthly basis.  Millipore Filtration Analysis, Solids Analysis, Water Anlysis, and Oil in Water are closely monitored.  The holding water tank was thieved to determine the amount of solids. 

The microorganisms utilized in this project were selected for their ability to inhibit deposition formation and breakdown existing deposits, improving the overall injectivity of the water.

• Click on the graph below

                     The Millipore Filtration Analysis measures particulate

                           contamination, and flowrates at holding tank

As the microorganisms attack the existing deposits, Total Volume Filtered increases as Total Dissolved Solids (Mg/L) decrease.  Simultaneously, the microbial activity tends to finely disperse suspended particles, resulting in reduced filter plugging.

                        As the program progresses, the combination of solublizing

                        existing deposits, inhibiting the formation of new deposits, and

                        reducing the size of the suspended solids translates to reduced

                        BS& W and improved water quality.

• Click on the graph below 

Oil in Water (ppm)

 Results:

• Soon after the first treatment, the operator noticed a significant visual improvement.
• 1 month later, BS&W was reduced to 2 1/2' and the remaining pad was very soft.
• Water quality is greatly improved
• A significant reduction in oil carryover has occurred during the course of the program.