The effect of ammonium bisulfite on sulphide in Brine/H2S solution

Bamidaley Ademola Lasebikan, Alfred Rotimi Akisanya, Wiliam F Deans, Donald E MacPhee, L Boyle

Research output: Contribution to conferencePaper

Abstract

Ammonium bisulfite (ABS) is used as an oxygen scavenger by the oil and gas industry in water flood and production systems. ABS is injected into the wellbore production annulus to scavenge any dissolved oxygen in the brine. Such brine used, as part of the well completion process might come into contact with hydrogen sulfide (H2S). The test program evaluated different concentrations of ABS in deaerated deionised water and brine solutions bubbled with H2S. The sulfide level in the deaerated deionised water and brine solutions were measured as a function of the stepwise increase in the ABS concentration.
The objective of this research was to obtain an understanding of the chemistry of ABS combined with H2S in brine solutions. The results established that there is a relationship between the amount of sulfide measured and increase in ABS concentration in H2S brine solutions at low pH. The difference in the degree of precipitation in the deaerated deionised water and brine solutions were noticeable. The ABS, also behaved like a pH buffer in solution due to relatively constant pH of the solution during precipitation and thereafter. Sulfite was reduced to sulfide and sulfur thus ABS should be included in material qualification test programmes of well tubuluars especially where H2S presence is identified.
Original languageEnglish
Publication statusPublished - 15 Mar 2010
EventNational Association of Corrosion Engineers (NACE), CORROSION 2010 - San Antonio, Texas, United States
Duration: 14 Mar 201018 Mar 2010

Conference

ConferenceNational Association of Corrosion Engineers (NACE), CORROSION 2010
CountryUnited States
CitySan Antonio, Texas
Period14/03/1018/03/10

Keywords

  • ammonium bisulfite
  • hydrogen sulfide
  • brine
  • sulfide
  • concentration
  • precipitation
  • pH

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  • Cite this

    Lasebikan, B. A., Akisanya, A. R., Deans, W. F., MacPhee, D. E., & Boyle, L. (2010). The effect of ammonium bisulfite on sulphide in Brine/H2S solution. Paper presented at National Association of Corrosion Engineers (NACE), CORROSION 2010, San Antonio, Texas, United States.