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Compressibility of oil

  1. Dec 19, 2008 #1
    Could anybody provide information on the bulk modulus of oil (say API Gravity 30-40) in the range of pressure 0-3000 psi and in the range of temperature 10-20 degrees C?

    Many thanks

    Filippo Librino
     
  2. jcsd
  3. Dec 20, 2008 #2

    stewartcs

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    Can you provide more details about the oil (e.g. gas-oil ratio, specific gravity, separator temp and pressure)? Hydrocarbons typically vary quite a bit over that large of a range.

    CS
     
  4. Dec 21, 2008 #3
    Thanks for your reply. Please assume no gas. As far as pressure and temperature, I am actually looking for curves or tables showing how the oil bulk module varies in the range 0-3000 psi and 10-20 degrees C.

    Filippo Librino
     
  5. Dec 22, 2008 #4

    stewartcs

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    NIST has a program called REFPROP that can probably generate the chart you want if you can specify the type of fluid. Version 8.0 includes most hydrocarbons so make sure you use it. Otherwise, you'll have to specify the exact conditions (specific gravity, pressure, temp, etc.) and calculate it.

    CS
     
  6. Dec 22, 2008 #5
    Thanks. I will try to get access to REFPROP 8.0.

    Filippo Librino
     
  7. Dec 22, 2008 #6

    stewartcs

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    I ran some hand calcs to give you an idea of what it would be with some arbitrary properties.

    Note that validity of the compressibility regarding the bubble point pressure (there are some other limitations that I haven't listed but are not directly applicable given the information you have already provided). Also, the formulas I used are for petroleum fluids (e.g. crude oil) and are based in part on empirical data.

    I would still recommend using NIST instead.

    Hope this helps.

    CS
     

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  8. Dec 24, 2008 #7
    Thanks for the additional information!

    Filippo Librino
     
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