Page 21 - Geochemistry of Oil Field Waters

10 SAMPLING SUBSURFACE OILFIELD WATERS

Droin
YOIV4 Oroln

Floottnq plston
h
' SAMPLE UNIT,'
Rubber doughnut Sample for low permobilities

Mud -

Dump chamber volve (locks open)
L " - J
MECHANICAL UNIT FIM-A SAMPLE UNIT

mE
RECORDED TESTER
POSITION
SP
Tester positioning depth

SURFACE CONTROL
IN0 ICATIDNS SAMPLING PRESSURE
Pod set
Tool open

Initial shut-in
? prss1ure
action
Sampling
pressure
3
Final shul-in
pressure
Hydroltotic

RECORDED LOG head
Fig. 2.2. Formation interval tester. (Courtesy of Schlumberger Well Services Company.)