Calculate Water Saturation (Sw)- Simandoux (1963)

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List of equations assignment

Water Saturation (Sw)- Simandoux (1963)

Another well known equation to calculate water saturation is Simandoux's equation (1963). This uses the same parameters used in other equations from other authors (e.g. Schlumberger, Ferlt, etc.), like shale volume, porosity, water resistivity, true formation resistivity, and shale/clay resistivity. The equation expression is the following:

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
• Rshale= shale/clay resistivity value in a formation

Calculate Water Saturation (Sw) - Simandoux (1963)
Rw: ohm-m		ɸ: Decimal
Vsh: Decimal		Rsh: ohm-m
Rt: ohm-m

Made by Henry Herrera