ISSN: 1546-962X
CODEN: JAIOAD
Published Online: 9 July 2007
Page Count: 11

Prediction of Strontium Sulfate Scale Formation in Oilfield Environment

Ezuber, Hosni M.
College of Engineering, University of Bahrain, Isa Town,

(Received 15 December 2006; accepted 29 May 2007)

Abstract

An easy and reliable method for predicting a scale tendency of strontium sulfate as a function of several variables including sodium chloride brine composition, temperature, and pressure effect is developed. The effect of the amount of sulfate tied up as [MgSO₄⁰] on SrSO₄ solubility is also considered. The magnesium sulfate dissociation constants and strontium sulfate experimental solubility data is fitted in mathematical equations. These equations can be easily used to determine SrSO₄ scaling tendency in environments common to oil field brines. The reliability and key features of the prediction method are illustrated in the text with oilfield well cases. Results obtained using the present model are in good agreement with field observation. The method presented in this study is easy to use, reliable, and can be applied to any producing wells where SrSO₄ occurs.

Keywords:
scale, strontium sulfate, prediction method

Paper ID: JAI100958
DOI: 10.1520/JAI100958
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