any correlation will be valid just for the given system. the simplest is to set up a waxing technique and use that for prediction

Can you suggest some literature from where I can get these correlations. I do not have the composition of crude oil but know the properties. 

Dear Amit, usually to predict wax deposition in a stream of crude, commercial simulators (Ppesim for example) have some established methods,

developed by some companies. I will list the ones that I know:

SHELL METHOD:

Wax Properties required:

• Density. Must be supplied if the max. wax plug DP/max. volume stopping option is used. Reasonable value: 55 lb/ft3

• Thermal Conductivity. Reasonable value: 0.15 Btu/hr/ft2/F

• Yield Strength. Reasonable value: 0.3 psi

You have to supply a CWDT (critical wax deposition temperature table).

• Deposition temperature against pressure

And need to Modeling Parameters

• A & B constants against temperature

• Rate model

BP METHOD: Wax Properties required:

• Conductivity Multiplier

• Yield Strength. Reasonable value: 0.3 psi

Additionally a Diffusion Coefficient Method is required, thera are three options:

• Wilke-Chang - requires a Diffusion Coefficient Multiplier

• Hayduk-Minhas - requires a Diffusion Coefficient Multiplier

• User supplied - requires a Diffusion Constant

However sis required: Oil Fraction in Wax, Roughness Multiplier and Shear Multiplier

SCHLUMBERGER DBR METHOD

Wax Properties Setup: The only required input is the Properties Filename, However, this file is generated by Schlumberger when you buy its simulator.

Finally you have to choose the method that best predicts the behavior of your system. You will need compare the results of your calculation with real data.

Dear Juan, 

Do we measure cloud point temperature / wax deposition temperature for crude oil during reservoir simulation? Does this value varies with pressure / dissolved GOR or density? Do we measure this value as a function of pressure during reservoir simulation? 

Dear Amit, I think you need experimental measurements of the Wax precipitation behavior to calibrate (or validate) the method you are going to use.

You could make the Measurement of wax precipitation data using a crude oil sample, there are ASTM Standards for Cloud Point, Wax dissolution temperature and Pour-point temperature. The value depends of Pressure, GOR and density (API Gravity). I suggest you this link http://petrowiki.org/Wax_precipitation

However, you could search if there is a publishing of one assay of a same crude oil like you have (The same segregation for instance), then it could be posible to use this data for your simulation.

I hope this can be useful…. Best Regards

The provided link does not give a correlation for cloud point / pour point as a function of pressure, GOR and API gravity. Can you suggest some link to article that gives such a correlation?

Amit, try with the follows links

http://sweet.ua.pt/jcoutinho/file/SPE78324.pdf

http://path.web.ua.pt/file/ef050082i.pdf

http://www.kbcat.com/images/documents/technical_papers/infochem/sped.pdf

https://www.onepetro.org/conference-paper/OTC-13076-MS