Coulter Count vs Silt Density Index

Dear All

I am exploring about the seawater pretreatment requirements of injection water for water flooding operations.  I came across the Coulter Count quality parameter. A thought came to mind, while comparing the seawater pretreatment requirements of desalination plants for drinking purposes, people in this industry use SDI 15 as a governing quality parameter.

Can I have your views on the differences of the coulter count and SDI value? Should we even try to compare those?

Your thoughts please!

Thank You

Best Regards

Anvar Mansuri