Reservoir Fluid Properties - Cased-Hole Log Analysis and Reservoir Performance Monitoring - page 24

Fig. 3.8 Relation between surface and downhole volumes. Courtesy Schlumberger
As an example Fig. 3.9 can be used to find the downhole water density, ˁ wwf .
Given: C NaCl = 90,000 ppm, T wf = 200 °F and P wf = 2,000 psia
1. Locate Point a by a line from C NaCl = 90,000 through T wf = 200 to a
2. Draw a line from p wf = 2,000 through point a and extend it to the ˁ wf vertical line
3. Read ˁ wwf = 1.038 g/cm 3