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Well log analysis for reservoir characterization (view source)
Revision as of 17:52, 8 December 2014
, 17:52, 8 December 2014→Calculate the Water Saturation
:<math>\frac{1}{Rt} = \frac{Sw^2}{F \times Rw} + \frac{Vsh \times Sw}{Rsh}</math>
:<math>\frac{1}{Rt} = \frac{Sw^2}{F \times Rw} + \frac{Vsh \times Sw}{Rsh}</math>
:<math>\text{Rw} = \frac{Rwe + 0.131 \times 10 \left (\frac{1}{\log \left ( \frac{BHT}{19.9} \right ) } \right )^{-2} }{-0.5 \times Rwe + 10 \left ( \frac{0.0426}{\log \left (\frac{BHT}{50.8} \right ) } \right ) } </math>
:<math>\text{Rw} = \frac{Rwe + 0.131 \times 10 \left (\frac{1}{\log \left ( \frac{BHT}{19.9} \right ) } \right )^{-2} }{-0.5 \times Rwe + 10 \left ( \frac{0.0426}{\log \left (\frac{BHT}{50.8} \right ) } \right ) } </math>
:<math>\text{Rwe} = Rmf \times 10^{\frac{SP}{61 + 0.133 \times BHT}}</math>
:<math>\text{F} = \frac{a}{\mathit{\Phi}^m}</math>
where Rt is the true resistivity of the formation (deep resistivity), Rw is the formation water resistivity, Vsh is the shale volume, Rsh is the resistivity of shale, Rwe is the formation water
where Rt is the true resistivity of the formation (deep resistivity), Rw is the formation water resistivity, Vsh is the shale volume, Rsh is the resistivity of shale, Rwe is the formation water