Reservoir Fluid Properties - Cased-Hole Log Analysis and Reservoir Performance Monitoring - page 42

Oil Viscosity . Oil viscosity is a function of ʳ osc , T wf , R sb and ∆ p , the incremental
pressure above the bubble-point pressure. It can be determined using Fig. 3.22 ,
which is built in two parts. The first part gives ʼ ob , the oil viscosity at the bubble-
point pressure. For conditions above p b , ʼ o increases by a factor, ∆ ʼ , given by the
second part of the chart.
Fig. 3.22 Oil viscosity. Courtesy Schlumberger