Page 27 - Basic Well Log Analysis for Geologist

BASIC RELATIONSHIPS OF WELL LOG INTERPRETATION

RESISTIVITY PROFILE ZONE
WATER
-

——
THROUGH A PERMEABLE
INVADED
HORIZONTAL SECTION
ZONE

WATER - BEARING BED

UNINVADED
ZONE
R t
I
|
I
1
|
i
| Sy >> 60%
I
|
|
|
1
|
|

|
!
I
RADIAL DISTRIBUTION > Ryo ---7 ;
OF RESISTIVITIES = |
=
Rag >>R a |
mf Ww Q ,
x |
FRESH MUDS R, ---4- L

|
I
t
4
—t
MUD CAKE ~ | 1 \INVADED ZONE; UNINVADED ZONE
i FLUSHED ZONE I DISTANCE ———»

J |
| I
| |
|
z ! !
> | |

-E | |
no I |
Rmf = Rw ty
ia a |
SALT MUDS Rro* Ro
I
I
!
!

+ INVADED ZONE UNINVADED ZONE
FLUSHED ZONE