Resistivities of Mud (Rm), Mudcake (Rmc) and Mud Filtrate (Rmf)?

Hi Friends,

If we don't have the Log Header, how can we find Resistivities of Mud (Rm), Mudcake (Rmc) and Mud Filtrate (Rmf)?

Thanks..

[SIZE=4]If You do NOT HAVE THE HEADER :
[B]MAKE FOLLOW[/B]
1 - To determine the Rm : Select any interval which has big washout, then read the value of MSFL in this case the value of MSFL consider the value of RM.
2- To determine the Rmf : from the following equation Rmf = Km (Rm)^1.07 Where K Varying Between 0.847 - 0.35 for Mud Weigh 10-18 Where
[B]Mud Weight (lbm/gal) or PPG[/B]---------------------------- [B] Km[/B]
10 ----------------------------------------------------- 0.847
11 ----------------------------------------------------- 0.708
12 ----------------------------------------------------- 0.584
13 ----------------------------------------------------- 0.488
14 ----------------------------------------------------- 0.412
16 ------------------------------------------------------ 0.380
18 ------------------------------------------------------ 0.350

3- To determine Rmc from the following Equation :
[B]Rmc = 0.69 Rmf (Rm/Rmf)^2.65[/B][/SIZE]

[QUOTE=geologist_wael;174514][SIZE=4]If You do NOT HAVE THE HEADER :
[B]MAKE FOLLOW[/B]
1 - To determine the Rm : Select any interval which has big washout, then read the value of MSFL in this case the value of MSFL consider the value of RM.
2- To determine the Rmf : from the following equation Rmf = Km (Rm)^1.07 Where K Varying Between 0.847 - 0.35 for Mud Weigh 10-18 Where
[B]Mud Weight (lbm/gal) or PPG[/B]---------------------------- [B] Km[/B]
10 ----------------------------------------------------- 0.847
11 ----------------------------------------------------- 0.708
12 ----------------------------------------------------- 0.584
13 ----------------------------------------------------- 0.488
14 ----------------------------------------------------- 0.412
16 ------------------------------------------------------ 0.380
18 ------------------------------------------------------ 0.350

3- To determine Rmc from the following Equation :
[B]Rmc = 0.69 Rmf (Rm/Rmf)^2.65[/B][/SIZE][/QUOTE]

Just adding 1 point : We should determine the temperature at the washout interval first. We could found the wellfile record for found the information about drilling fluid using for that well.
:unconscious:

thank for the information, it's helping me so much