I have a project related to an oil platform. I need to do material balance, energy balance and so on. Now I need viscosity and densities of some fluids, only 2 of them are rest :( sand and light oil
Since you are only trying to do material balance and I am assuming you are looking at fields in famous region (eg. North Sea) then I would suggest you use correlations. North Sea correlations for viscosity can be found in any book of petroleum fluids: I would recommend Tarik Ahmed Reservoir Engineering Handbook of course after you have a look at the best book in fluids written by McCain as Rosalind mentioned.
Hope you have already found what you are looking for by now and if not this might help. Please contact me if you need specific correlation to be used, I hope I can be some sort of support to you. All the best!