Which fraction of crude oil is viscous?

Answer 1

Crude oil is about as different as cheese. Varies a lot. color is black/brown,water white,dark green,reddish etc. it depends upon the components it hold (As lighter components it hold as lighter in color and as heaver as dark it will be) density is between 700 - 1000 kg/cum and kinematic viscosity can be anywhere between 1 and 8 cSt (centi stokes)

Answer 2

Typically, the heavier fractions of crude oil, such as bitumen and heavy oils, are more viscous compared to lighter fractions such as gasoline and diesel. Viscosity increases as the molecular weight and complexity of the hydrocarbon chains in the oil increase.

Answer 3

Viscosity is a function of temperature, pressure, gravity and dissolved gas in the oil. A common way to calculate viscosity is to use a correlation related to the dead oil viscosity (at surface at standard temperature, usually 60 deg and atmospheric pressure) and then adjust the viscosity for reservoir conditions. I have attached a paper on the calculation methods. Generally, a sample is taken when a new field is discovered, and the viscosity is calculated in the laboratory. Light dead crude oil can range from about 0.6 to 5 cp as given in the attached paper.

Answer 4

The viscosity of Crude Oil found in Iranian reservoirs are estimated by many scholars. As of today the viscosity estimate can be sought from many scholars. The data is given below.

Viscosity, cP value for Iran crude oil


Naseri & et. al (2005) 0.75-54

Answer 5

usually crude oil is black or brown.but they can also be red,yellow,or even colorless.

Answer 6

The higher the boiling point - the lower the viscosity is.

Answer 7

bitumen.