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Tixier Rocky Mountain Method
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| INPUTS |
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Depth =
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Total depth =
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Avg surface temp =
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Bottomhole temp =
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Mud resistivity, Rm =
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Rm measuring temp =
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Percentage of
formation water
left in invaded zone,
z% =
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| Common values: |
| z%=0 |
Porosity < 10% |
| z%=5 |
Porosity 10% - 18% |
| z%=7.5 |
Porosity 18% - 25% |
| z%=10 |
Porosity > 25% |
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Ri, shallow resistivity =
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Rt, deep resistivity =
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| Rw, formation water resistivity =
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Define optional
porosity model:
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a =
m =
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| INPUT RMF? |
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| Resistivity of mud filtrate, Rmf =
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| Rmf measuring temperature =
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| RESULTS |
Temperature gradient =
per 100 depth units
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| Formation temperature =
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Corrected Rm =
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Corrected Rmf =
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| Mixed water resistivity, Rz =
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| Water saturation, Sw% =
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Porosity% from Archie model
(limestone: a=1, m=2) =
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Porosity% from Humble model
(sandstone: a=.62, m=2.15) =
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| Porosity% from optional model =
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