Tixier Rocky Mountain Method


INPUTS 

Depth =

Total depth =

Avg surface temp =

Bottomhole temp =

Mud resistivity, Rm =

Rm measuring temp =

Percentage of formation water left in invaded zone, z% =

Common values: 
z%=0 
Porosity < 10% 
z%=5 
Porosity 10%  18% 
z%=7.5 
Porosity 18%  25% 
z%=10 
Porosity > 25% 

Ri, shallow resistivity =

Rt, deep resistivity =

Rw, formation water resistivity =

Define optional porosity model:

a =
m =

INPUT RMF? 

Resistivity of mud filtrate, Rmf =

Rmf measuring temperature =


RESULTS 
Temperature gradient =
per 100 depth units

Formation temperature =

Corrected Rm =

Corrected Rmf =

Mixed water resistivity, Rz =

Water saturation, Sw% =

Porosity% from Archie model (limestone: a=1, m=2) =

Porosity% from Humble model (sandstone: a=.62, m=2.15) =

Porosity% from optional model =

