Reservoir Fluid Properties - Cased-Hole Log Analysis and Reservoir Performance Monitoring - page 27

Question #3.2 R sw
Flowing pressure = 2,000 psi.
Flowing temperature = 200 °F.
Water salinity = 25,000 ppm NaCl.
a. Find R ′ sw from the upper chart
b. Find F bc from the lower chart
c. Find R sw = R ′ sw × F bc = ___ cf/B
Water Viscosity . The viscosity of water can be an important item of data when inter-
preting spinner (flowmeter) surveys and repeat formation tester permeability tests.
Water viscosity can be determined from Fig. 3.11 . By way of example Fig. 3.11 may
be used to find water viscosity, ʼ wwf as follows:
Given: C NaCl = 150,000 ppm and T wf = 200 °F
1. Enter abscissa at T wf = 200
2. Go up to C NaCl = 150,000
3. Read ʼ wwf = 0.43 cp
Fig. 3.11 Water viscosity. Courtesy Schlumberger