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How to calculate pressure of a mixture of oil Reservoir fuids?

  1. Dec 3, 2011 #1
    **Sorry, could a mod place this thread in the science homework section please**

    An oil reservoir with normal reservoir pressure at water oil contact (WOC of =12000ft) contains water, oil and gas columns of 800, 500 and 600 ft height respectively.

    Calculate reservoir pressure at WOC, gas oil contact (G0C) and depths of 12500, 11700 and 11000 ft?

    ρw = 1000 kg/m^3
    ρo = 800 kg/m^3
    ρg = 120 kg/m^3

    g = 9.8 m/s^2
    ft = 0.305m
    Patm = 0.1 Mpa

    Would Pressure at WOC be : Patm + Pw + Po = 0.1x10^6 + (1000*9.8*3660m) + (800*9.8*3660m) = 64.7 Mpa

    Also what would be the height to use in the P = ρgh formula for the pressure calculations at GOC,depths of 12500, 11700 and 11000 ft.
    Would for example the water contact give a height of 12000 - 800 = 11200ft water column?
  2. jcsd
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