A comparison of standard thermodynamic properties and solubility data for baryte, Ba2+(aq) and SO4 2-(aq)

B.Y. Zhen-Wu, K. Dideriksen, D.A. Belova, P.J. Raahauge, S.L.S. Stipp

Research output: Contribution to journalArticleResearchpeer-review

13 Citations (Scopus)

Abstract

The thermodynamic solubility product for baryte, determined at standard conditions, from data in commonly used compilations, was compared with published experimental solubility products for baryte and with the solubility products from databases used by the PHREEQC geochemical speciation code and MultiScale, which is often used by oil companies to predict or describe baryte scaling. The values in the various databases agree well with experimental data (10-10.05-10-9.96; Melcher, 1910; Neuman, 1933; Templeton, 1960; Davis and Collins, 1971; Blount, 1977; Felmy et al., 1990), which agree within uncertainty with the values presented in the compilations of Robie et al. (1979), Wagman et al. (1982), Lide (2005), Raju and Atkinson (1988), as well as Nordstrom and Munoz (1994), whose values have the least uncertainty. In solutions of 50% seawater mixed with 50% reservoir formation waters, the data predict baryte supersaturation, both at standard temperature and at the temperatures expected in the reservoir, completely consistent with field observations. This provides confidence that the Pitzer approach for activity correction and the database is valid for investigations of baryte precipitation rates in high ionic strength solutions.

Original languageEnglish
Pages (from-to)1505-1515
Number of pages11
JournalMineralogical Magazine
Volume78
Issue number6
DOIs
Publication statusPublished - 1 Nov 2014
Externally publishedYes

Keywords

  • Ba
  • Barite
  • Barium
  • Baryte
  • BaSO
  • MultiScale
  • PHREEQC
  • SO
  • Solubility
  • Standard state
  • Sulfate
  • Thermodynamics

Programme Area

  • Programme Area 3: Energy Resources

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