Wednesday, December 27, 2017

Calculate Water Saturation Sw (Ferlt, 1975)

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List of equations assignment

Water Saturation (Sw) - Ferlt (1975)

Among the equations for the calculation of water saturation, we find Ferlt's equation (1975). This one includes the values of porosity, water resistivity, true formation resistivity, shale volume, and a constant "a", which its value is known for certain zones. The equation is the following:

Water Saturation (Sw) - Ferlt (1975)
    Where:
  • Sw= water saturation of the uninvaded zone
  • Rt= true formation resistivity (i.e., deep induction or deep laterolog corrected for invasion)
  • Rw= resistivity of formation water at formation temperature
  • ɸ = porosity
  • Vshale= shale volume
  • a= 0.25 at the Golf Coast
  • a= 0.35 at the Rocky Mountains


Calculate Water Saturation (Sw) - Ferlt (1975)

Made by Henry Herrera

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