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CASE STUDY:  

 

 

Bactron ® K   87

Global E&P Producer Redeploys Bactron® K-87 for Long-term Dependable Results; Thirdparty testing proves Bactron® K-87 is an effective and long-lasting biocide with greater efficacies than many other common biocides used in the Oil & Gas industry. Overview: Country/Region: United States Market: Unconventional Customer Profile: A global independent crude oil and natural gas exploration company with super majors and regional major companies as clients. Business Situation: Economic downturn prompted the operator to reassess the chemical program with comparable technologies against the combination of Bactron® K-87 and Surfatron® DQ-76. Solution: Third-party testing ordered by the operator proved Champion’s chemical program to be most effective. Testing proved the new program did not sustain itself through the entire fracturing process allowing bacteria to quickly proliferate in the flowback water whereas wells treated with Bactron® K-87 over a year ago sustained long term bacterial control. Benefits: • Bactron® K-87 is an EPA registered biocide • Long term bacterial control • Compatible with fracturing fluids and chemicals • Broad spectrum biocide

Background

Slick water fracturing for low permeability reservoirs has been successfully utilized throughout the numerous unconventional shale plays that exist today. Large volumes of fluids, consisting predominately of fresh water, friction reducer, and proppant are required to facilitate fracturing of the reservoir for the production of gas. Typically, the large volumes of water are pumped to a blender, where the rest of the components are added “on the fly.” The resulting slick water is then pumped downhole under tremendous pressure into the fracturing zone. While this type of fracturing method is effective, it can Example of flow back fluid from an also bring about a concern untreated stimulation job regarding bacteria proliferation which poses not only a risk to successful fracturing, but serious risk to long term integrity management of the production asset. In most shale plays, water used for hydraulic fracturing is typically obtained from a variety of sources including lakes, ponds, city water and fresh water supply wells. Polymeric and other organic compounds in the fracturing fluids can serve as a food source for bacteria, resulting in bacteria infestation and further elevating the potential for severe bacterial infestation. After a fracturing job is complete, it is often desirable to reuse flowback water for future fracturing jobs. If the original fracturing job was not properly treated to control bacteria, the water often flows back heavily contaminated with bacteria and iron sulfide. Without treating this type of flowback water, it can be difficult, if not impossible, to reuse it for future fracturing jobs.

  CASE STUDY: Bactron® K-87

 

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No part of this document may be reproduced by any means without specific written permission for Champion Technologies. While all reasonable care has been taken in the preparation of this document, no liability is accepted for any errors, omissions or misstatements it may contain and disclaims all warranties, express or implied, and all liabilities, losses and damages arising out of any person relying on any statement or omission in this document.


The following photos illustrate the enormous amount of bacteria that could potentially be introduced downhole with a fracturing job. The photo also illustrates that the bacteria can be easily controlled with the proper biocide treatment. Problem

An operator in the Texas Panhandle was experiencing bacteria problems in the slick water used for fracturing operations. Champion field personnel utilized the NACE (API) serial dilution procedures to determine the extent of the bacteria problem. After six days of incubation, the evaluation of the frac pits showed that they were loaded with bacteria. Initial Serial Dilution Results (Bacteria/mL) Sample  Point*  

Anaerobic  Sulfate   Reducing  

Anaerobic  Acid   Producing  

Aerobic  

Pit  A  

10,000  

10,000  

1,000,000  

Pit  B  

10,000  

100,000  

100,000  

Pit  C  

1,000  

1,000  

100,000  

Producer  A  

10,000+  

10,000+  

10,000+  

Producer  B  

10,000+  

10,000+  

100  

Producer  C   10,000+   100   * s Producer  D   10   10,000+   a mple point names were changed +infestation greater than number of serial dilution bottles shot

1,000   10,000+  

A one gallon sample of water from the Producer B frac pit was taken for solids filtering to determine the cause of the turbid black appearance. Although silts, sands, and salts were evident, the prominent contributor was low ranging iron compounds and organic biomass material consistent with the levels of prolific bacteria seen in the serial dilution results. NACE (API) time kill studies were conducted in order to determine the best product and dose rate to control the bacteria problem. Several different biocide chemistries were evaluated including THPS and glutaraldehyde as well as other synergistic blends. The frac pit water used in this evaluation was stirred from the bottom of the pit to emulate frac pit pump circulation and truck dumping during and between stages prior to sampling. A recommendation was made by Champion’s Sales Engineer, based on results of the time kill study, to treat the frac fluids with Bactron® K-87, a powerful, broad spectrum EPA registered biocide.

Results of Time Kill Studies (No. of Positive Bottles) CASE STUDY: Bactron® K-87

 

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No part of this document may be reproduced by any means without specific written permission for Champion Technologies. While all reasonable care has been taken in the preparation of this document, no liability is accepted for any errors, omissions or misstatements it may contain and disclaims all warranties, express or implied, and all liabilities, losses and damages arising out of any person relying on any statement or omission in this document.


“The operator noted that he believed Bactron® K-87 to be the most effective product for ensuring complete integrity management of their system…”

“Bactron® K-87 has emerged as one of the leading biocides used in shale plays in the US with a strong history of success…” “Results of Time Kill Studies indicate that Bactron® K-87 was the most effective biocide…”

 

Product  Name  

Conc.  (ppm)  

Aerobic  

Anaerobic  Acid   Producing  

Blank     Bactron®  K-­‐31   Bactron®  K-­‐31   Bactron®  K-­‐31   Bactron®  K-­‐31     Bactron®  K-­‐67   Bactron®  K-­‐67   Bactron®  K-­‐67   Bactron®  K-­‐67     Bactron®  K-­‐87   Bactron®  K-­‐87   Bactron®  K-­‐87   Bactron®  K-­‐87     Bactron®  K-­‐103   Bactron®  K-­‐103   Bactron®  K-­‐103   Bactron®  K-­‐103  

0     250   500   750   1000     250   500   750   1000     250   500   750   1000     250   500   750   1000  

8     3   5   1   0     2   1   0   0     0   0   0   0     1   1   0   0  

5     3   1   1   1     0   0   0   0     0   0   0   0     1   0   0   0  

Anaerobic   Sulfate   Reducing   4     2   0   0   0     0   0   0   0     0   0   0   0     1   2   1   0  

This study clearly indicated that Bactron® K-87 was the most effective biocide for this application resulting in total kill even at low concentrations. A recommendation was submitted to treat the fracturing fluids with Bactron® K-87 on the fly. In addition, Surfatron® DQ-76, a water soluble, inorganic oxidizing agent, was used to clean up the frac pit water used for this job, which was heavily contaminated with iron sulfide and hydrogen sulfide. In the three year period that Champion had been treating the field, the combination of Bactron® K-87 and Surfatron® DQ-76 had proven to be effective in sterilizing the frac water and resolving the solids making the frac water treatments successful. There were no issues with plugging or pressure increases and there was very little to no bacteria present in the flow back. Bacteria Evaluations

*AER Aerobic AAPB: Anaerobic Acid Producing ASRB: Anaerobic Sulfate Reducing

Date   Sampled  

Stage  

Type  of   Media*  

Days   Incubated  

Cells/mL  

9/14/07  

Raw  Pit  Water  

ASRB  

10  

1,000,000  

9/14/07  

Raw  Pit  Water  

AAPB  

10  

10,000  

9/14/07  

Raw  Pit  Water  

AER  

10  

10,000  

11/11/07  

30%  Flow  back  

ASRB  

21  

0  

11/11/07  

30%  Flow  back  

AAPB  

21  

0  

11/11/07  

30%  Flow  back  

AER  

21  

0  

12/7/07  

After  Flow  back  Produced  

ASRB  

21  

0  

12/7/07  

After  Flow  back  Produced  

AAPB  

21  

10  

12/7/07  

After  Flow  back  Produced  

AER  

21  

10  

Performance Result

CASE STUDY: Bactron® K-87

 

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No part of this document may be reproduced by any means without specific written permission for Champion Technologies. While all reasonable care has been taken in the preparation of this document, no liability is accepted for any errors, omissions or misstatements it may contain and disclaims all warranties, express or implied, and all liabilities, losses and damages arising out of any person relying on any statement or omission in this document.


The operator chose the competitor product due to their lower cost and claims of higher efficacy. They began using a mixture of chlorine dioxide and bromine to treat their frac water while hiring a third party testing company to evaluate treatment efficiencies of this new method in comparison to Bactron® K-87. Approximately 15 – 20 fracs using the mixture of chlorine dioxide and bromine treatment were tested. Compared to Bactron® K-87, it was determined that although the frac water seemed to be cleaned with this new solution, the treatment did not sustain itself through the entire fracturing process allowing bacteria load to come back quickly in the flow back water. It was believed that the chlorine dioxide and bromine solutions were not reaching irreversible damage dosage rates therefore allowing it to be consumed quickly during the frac treatments. This made the chlorine dioxide and bromine solutions successful in the initial phases, but did not leave enough residual to last throughout the flow back. Because the bacteria could recover from any oxidative damage that occurred, the lack of residual treatment from the chlorine dioxide and bromine solution resulted in bacteria formation later on in the fracturing process and required further treatment. This in turn increased chemical costs and reduce wellbore life expectancy. Frac Treatment Comparisons Over Time   Frac   Treated  By  

Cultures  After  Treatment  

Date  

Well   #  

Product  

Anaerobic   SRB  

Anerobic   APB  

Aerobic   APB  

Champion  

Jul-­‐07  

Champion  

Oct-­‐07  

A  

Bactron®  K-­‐87  

0  

0  

0  

B  

Bactron®  K-­‐87  

0  

0  

0  

Champion  

Sep-­‐08  

C  

Bactron®  K-­‐87  

0  

0  

1-­‐9  

Champion  

Nov-­‐08  

D  

Bactron®  K-­‐87  

0  

10-­‐99  

0  

1,000-­‐ 9,999  

999,999  

999,999  

Competitor  

Aug-­‐08  

E  

25%   Gluteraldehyde  

Competitor  

Nov-­‐08  

F  

Chloride  Dioxide  

999,999  

999,999  

999,999  

Competitor  

Feb-­‐09  

G  

Chloride  Dioxide  

1-­‐9  

10-­‐99  

10-­‐99  

**All wells pumped from frac pits containing raw water with significant bacteria infestation.

Alternatively, Bactron® K-87 along with Surfatron® DQ-76 not only cleaned the frac water, but the proliferation of bacteria on the flow back was rare. Furthermore, Bactron® K-87 sustained long term bacteria control as evidenced by cultures inoculated on producing wells fractured over a year ago. These wells were still bacteria free or had nominal levels of infestation. With these results, the operator opened a new bid which resulted in them switching back to Bactron® K-87. The operator noted that he believed Bactron® K-87 to be the most effective product for ensuring complete integrity management of their system as evidenced by third party testing and their own experience with Bactron® K-87. About Champion Technologies CASE STUDY: Bactron® K-87

 

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No part of this document may be reproduced by any means without specific written permission for Champion Technologies. While all reasonable care has been taken in the preparation of this document, no liability is accepted for any errors, omissions or misstatements it may contain and disclaims all warranties, express or implied, and all liabilities, losses and damages arising out of any person relying on any statement or omission in this document.


Champion Technologies is the fastest growing specialty chemical company offering innovative and environmentally acceptable solutions to oil & gas production problems. We deliver technical solutions that enhance productivity and improve well economics - making our customers more profitable. Our ongoing commitment to research and development has led to one of the most groundbreaking portfolios in chemical management. Originally started in West Texas, USA over 50 years ago, Champion (a Permian Mud Service company) has become the second largest global oilfield production chemical company with staffed operations of about 2000 people. In more than 30 countries, Champion has significant presence in the major oilfield areas of the world. Our resources include worldwide manufacturing, blending and distribution capabilities. Champion research and development supports a fit-for-purpose product line applied by field experts based on thorough analysis and sophisticated modeling technology. In marginal wells, our products and services offer solutions to economically improve production and extend well life in the most difficult applications. Our deepwater operations experience provide a broad range of laboratory services, design expertise and chemical products. We've grown, but we're still focused on our customers. Each project still begins with a customer's specific problem - not an inventory of standard chemical treatments. The same personalized approach, but now with a global footprint. For more information about Champion Technologies’ products and services, please contact your local Champion office, or the following regional headquarters: U.S.A. Canada Argentina Aberdeen Moscow Singapore

713.627.3303 403.234.7881 54.11.4343.1100 44.0.1224.879022 7.495.981.25.58 65.6733.9482

To access information using the World Wide Web, go to: www.champ-tech.com

CASE STUDY: Bactron® K-87

 

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No part of this document may be reproduced by any means without specific written permission for Champion Technologies. While all reasonable care has been taken in the preparation of this document, no liability is accepted for any errors, omissions or misstatements it may contain and disclaims all warranties, express or implied, and all liabilities, losses and damages arising out of any person relying on any statement or omission in this document.


/CS-BactronK-87dkrevisedOct2011  

http://champ-tech.com/Portals/0/PDF/CaseHistories/homepageOnes/CS-BactronK-87dkrevisedOct2011.pdf

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