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08658 Use of Microbiocides in Barnett Shale Gas Well Fracturing Fluids to Control Bacterially Related Problems

Picture for 08658 Use of Microbiocides in Barnett Shale Gas Well Fracturing Fluids to Control Bacterially Relate
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Product Number: 51300-08658-SG
ISBN: 08658 2008 CP
Author: Jennifer K. Fichter, Kelly Johnson, Karl D. French, and Rod Owen
Publication Date: 2008
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Bacterial contamination of fracturing fluids leads to a number of serious problems in the oil field. If the fracturing fluids are poorly treated or untreated, sulfate-reducing bacteria (SRB) and acid-producing bacteria (APB) can become established downhole, in production lines, gas / fluid separation, storage equipment, and in the gas gathering and transportation systems. This may result in hydrogen sulfide production, iron sulfide production and microbially influenced corrosion (MIC). Many of these fracturing fluids contain polyacrylamide or sugar-based polymers and other organic compounds which serve as food sources for bacteria. As a consequence of the water volume required for the fracturing process, the water used for preparation of these fluids is obtained from rivers, lakes, or oil field wastewater and is heavily contaminated with bacteria. This paper presents a case history discussing the background survey of various fracturing water sources, the biocide selection process, bacterial mitigation program implementation, monitoring and optimization of a Barnett Shale fracturing biocide program.
Bacterial contamination of fracturing fluids leads to a number of serious problems in the oil field. If the fracturing fluids are poorly treated or untreated, sulfate-reducing bacteria (SRB) and acid-producing bacteria (APB) can become established downhole, in production lines, gas / fluid separation, storage equipment, and in the gas gathering and transportation systems. This may result in hydrogen sulfide production, iron sulfide production and microbially influenced corrosion (MIC). Many of these fracturing fluids contain polyacrylamide or sugar-based polymers and other organic compounds which serve as food sources for bacteria. As a consequence of the water volume required for the fracturing process, the water used for preparation of these fluids is obtained from rivers, lakes, or oil field wastewater and is heavily contaminated with bacteria. This paper presents a case history discussing the background survey of various fracturing water sources, the biocide selection process, bacterial mitigation program implementation, monitoring and optimization of a Barnett Shale fracturing biocide program.
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