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Expansion and elasticity of brines

  1. Aug 10, 2016 #1

    I am currently looking at a way to calculate brine density using temperature, pressure and salinity.
    I found the following page which describes the change in fluid density with pressure and temperature :

    However I am missing two parameters which I haven't been able to find for brines:
    - β = volumetric temperature expansion coefficient (m3/m3 oC)
    - E = bulk modulus fluid elasticity (N/m2)

    Ideally I would need to find an equation which takes in pressure, temperature and salinity which are my known variables. Or tables, the salinity of my brine is 7 wt%, the pressure around 400 bars and the temperature of 141 °C . Note: Since the temperature used to work out β is the average between 0 °C and 141 °C, I would be looking for β at 70.5 °C.

    Thank you for your help
  2. jcsd
  3. Aug 10, 2016 #2


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    Staff: Mentor

    You may be able to compare your calculation with that determined by the formula in this article:
    http://www.ogj.com/articles/print/volume-99/issue-52/drilling-production/method-determines-brine-density-for-hpht-wells [Broken]
    The image depicting the equation and parameters seems to be deliberately illegible low res in the online version of the publication. :oldmad:
    Last edited by a moderator: May 8, 2017
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