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A Study of Nonconventional Biocide Treatments of Barnett Shale Gathering Pipelines

Picture for A Study of Nonconventional Biocide Treatments of Barnett Shale Gathering Pipelines
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This is a comprehensive field case study of the effectiveness of various biocide applications and chemistries in conjunction with CO2 acid gas corrosion inhibition on the largest wet gas gathering system in the Dallas-Fort Worth MetroPlex (i.e. the Barnett Shale).

Product Number: 51317--8866-SG
ISBN: 8866 2017 CP
Author: Jared Hebert
Publication Date: 2017
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Unconventional oil and natural gas shale plays in the Unites States have introduced unique challenges to all aspects of oil and gas production including corrosion mitigation. Microbiologically influenced corrosion (MIC) has become a common cause of internal corrosion failures due to the increase of low velocity wet gas pipeline gathering systems. The origin of such microbes into closed production environments can be traced back to the drilling stage of wells in which stagnant dirty "frack pond" water is used to hydraulically fracture or "frack" wells or by using untreated water for hydrostatic pressure testing of pipeline systems. Such gathering systems particulalry those in densely populated metro areas (e.g. the Barnett Shale) have come to require a significant amount of attention in regards to asset integrity as well as U.S. government compliance.This is a comprehensive field case study of the effectiveness of various biocide applications and chemistries in conjunction with CO2 acid gas corrrosion inhibition on the largest wet gas gathering system in the Dallas-Fort Worth MetroPlex (i.e. the Barnett Shale). Routine monitoring with serial dilution culture techniques representative of both planktonic and sessile bacteria indicates successful migitation of MIC with a combination of the continuous injection of an EPA registered biocide frequent maintentance pigging and the continuous injection of a corrosion inhibitor. 16S rDNA testing has confirmed the abundant culture data collected since colonies with the continuous injection of biocide regular pigging and continuous injection of corrosion inhibitor.

Key words: biocide, MIC, microbiologically influenced corrosion, gathering pipeline system, pigging

Unconventional oil and natural gas shale plays in the Unites States have introduced unique challenges to all aspects of oil and gas production including corrosion mitigation. Microbiologically influenced corrosion (MIC) has become a common cause of internal corrosion failures due to the increase of low velocity wet gas pipeline gathering systems. The origin of such microbes into closed production environments can be traced back to the drilling stage of wells in which stagnant dirty "frack pond" water is used to hydraulically fracture or "frack" wells or by using untreated water for hydrostatic pressure testing of pipeline systems. Such gathering systems particulalry those in densely populated metro areas (e.g. the Barnett Shale) have come to require a significant amount of attention in regards to asset integrity as well as U.S. government compliance.This is a comprehensive field case study of the effectiveness of various biocide applications and chemistries in conjunction with CO2 acid gas corrrosion inhibition on the largest wet gas gathering system in the Dallas-Fort Worth MetroPlex (i.e. the Barnett Shale). Routine monitoring with serial dilution culture techniques representative of both planktonic and sessile bacteria indicates successful migitation of MIC with a combination of the continuous injection of an EPA registered biocide frequent maintentance pigging and the continuous injection of a corrosion inhibitor. 16S rDNA testing has confirmed the abundant culture data collected since colonies with the continuous injection of biocide regular pigging and continuous injection of corrosion inhibitor.

Key words: biocide, MIC, microbiologically influenced corrosion, gathering pipeline system, pigging

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