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07507 Investigation into Halfdan Water Injection Biofilm Using Chemical Microsensors

Picture for 07507 Investigation into Halfdan Water Injection Biofilm Using Chemical Microsensors
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Product Number: 51300-07507-SG
ISBN: 07507 2007 CP
Author: Jan Larsen, Braden Dunsmore, and Carsten Schwermer
Publication Date: 2007
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Nitrate has been added to the injection seawater in the Halfdan field since January 2001 in order to prevent reservoir souring. The Halfdan water injection pipeline contains a significant biofilm, made up of nitrate utilizing bacteria (NUB) and a small, but persistent population of sulfate reducing bacteria (SRB). In this paper, we demonstrate that various chemical microsensors can be used for assessing the souring potential and corrosivity of the biofilm formed in the Halfdan seawater injection system treated with nitrate. The results obtained were compared with a similar microsensor investigation on a biofilm formed using Halfdan injection seawater containing no nitrate. The biofilms were obtained by installing Sessile Bacteria Monitoring Tubes (SBMTs) both upstream and downstream of the nitrate injection point. Both biofilms were allowed to grow for four months.
Nitrate has been added to the injection seawater in the Halfdan field since January 2001 in order to prevent reservoir souring. The Halfdan water injection pipeline contains a significant biofilm, made up of nitrate utilizing bacteria (NUB) and a small, but persistent population of sulfate reducing bacteria (SRB). In this paper, we demonstrate that various chemical microsensors can be used for assessing the souring potential and corrosivity of the biofilm formed in the Halfdan seawater injection system treated with nitrate. The results obtained were compared with a similar microsensor investigation on a biofilm formed using Halfdan injection seawater containing no nitrate. The biofilms were obtained by installing Sessile Bacteria Monitoring Tubes (SBMTs) both upstream and downstream of the nitrate injection point. Both biofilms were allowed to grow for four months.
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