Considerations on the possibility of microbial clogging of re-injection wells of the wastewater generated in a water-dissolved natural gas field

Yuichi Sugai, Kyuro Sasaki, Ryo Wakizono, Yasunori Higuchi, Noriyuki Muraoka

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Brine produced from water-dissolved natural gas reservoirs should be returned to the reservoirs after the resources are recovered to prevent land subsidence. However, the ability to re-inject the brine gradually decreases and is only rectified by carrying out backwashing treatment of re-injection wells. Because the brine contains high levels of iodine also, it is also recovered from the brine using sulfuric acid and oxidizing agents. These chemicals may stimulate the growth of microorganisms that may cause the clogging. In this study, we used column experiments to investigate the possibility of the microbial clogging.Significant clogging was observed on the columns that were treated by the brine containing both indigenous microorganisms and dissolved oxygen. In particular, iodide-oxidizing bacteria were detected from the columns and original brine dominantly; therefore, it was assumed to have an important influence on the clogging. Iodine that was produced by iodide-oxidizing bacteria corroded iron in the sand under the presence of dissolved oxygen. Eluted Iron formed ferric hydroxide colloid in the brine and it caused the clogging of the pore spaces.We also demonstrated that deoxidized brine inhibited the iodide-oxidizing bacteria from becoming dominant and the column from the clogging through the column experiments. From these results, we can suggest removing dissolved oxygen as the most feasible countermeasures for the clogging.

Original languageEnglish
Pages (from-to)35-43
Number of pages9
JournalInternational Biodeterioration and Biodegradation
Volume81
DOIs
Publication statusPublished - Jul 1 2013

Fingerprint

Natural gas fields
Natural Gas
Oil and Gas Fields
dissolved gas
Dissolved oxygen
Waste Water
gas field
brine
natural gas
Bacteria
Wastewater
Iodine
well
wastewater
Microorganisms
Injections
Water
Iron
iodide
Iodides

All Science Journal Classification (ASJC) codes

  • Waste Management and Disposal
  • Microbiology
  • Biomaterials

Cite this

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title = "Considerations on the possibility of microbial clogging of re-injection wells of the wastewater generated in a water-dissolved natural gas field",
abstract = "Brine produced from water-dissolved natural gas reservoirs should be returned to the reservoirs after the resources are recovered to prevent land subsidence. However, the ability to re-inject the brine gradually decreases and is only rectified by carrying out backwashing treatment of re-injection wells. Because the brine contains high levels of iodine also, it is also recovered from the brine using sulfuric acid and oxidizing agents. These chemicals may stimulate the growth of microorganisms that may cause the clogging. In this study, we used column experiments to investigate the possibility of the microbial clogging.Significant clogging was observed on the columns that were treated by the brine containing both indigenous microorganisms and dissolved oxygen. In particular, iodide-oxidizing bacteria were detected from the columns and original brine dominantly; therefore, it was assumed to have an important influence on the clogging. Iodine that was produced by iodide-oxidizing bacteria corroded iron in the sand under the presence of dissolved oxygen. Eluted Iron formed ferric hydroxide colloid in the brine and it caused the clogging of the pore spaces.We also demonstrated that deoxidized brine inhibited the iodide-oxidizing bacteria from becoming dominant and the column from the clogging through the column experiments. From these results, we can suggest removing dissolved oxygen as the most feasible countermeasures for the clogging.",
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T1 - Considerations on the possibility of microbial clogging of re-injection wells of the wastewater generated in a water-dissolved natural gas field

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AU - Sasaki, Kyuro

AU - Wakizono, Ryo

AU - Higuchi, Yasunori

AU - Muraoka, Noriyuki

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