# Question

• I am looking for way to blend heavy crude oil with light crude for easy treatment. How can I manage to write the equation to determine the quantity of the different crude. And how can design the blending system (in line or tank blender)

Nov-2021

• Mohammed Abdallah, MINISTRY OF PETROLEUM, abdallahhussienmohammed@gmail.com

Yes you can but under some conditions that make the blend compatible and safe from asphaltene flocculation.

First you have to use wt unit to avoid volume shrinkage problem.

Second you have to determine the blend ratio and total volume of the blend.

Third measure the density for both types of crude oil

Then calculate the wt Required in the blend.

e.g. To prepare 25 light :75 heavy blend in 10000L tank

(25 *10000)/100  = 2500 L light crude

2500*density of LC = wt in blend.( X)

(75*10000)/100=7500 L

7500*density of HC =wt in blend

So you have to wt X LIGHT +Y HEAVY= BLEND

NOTE:
To homogeneous the blend shake it well and keep it in 60 C for long Time.

Read SARA test to determine Colloidal instability index CII I f CII less than or equal one your blend is perfect and compatible If not its incompatible.

You can send me email If you need further informations.

Mar-2022

• Mohammed Abdallah, MINISTRY OF PETROLEUM, abdallahhussienmohammed@gmail.com

If you would like to blend to liquid you have to know their density first then you have to determine the ratio of the blend after that the total blend amount you need.

Mar-2022

• Conrad Teran, SUEZ Water Technologies & Solutions, conrad.teran@suez.com

Can you be more specific as to what you are looking for and in what contest?

If you are talking about determining crude instability or incompatibility parameters, there is not a straight forward equation to do that. There are proprietary models and services such as the one (Suez WTS) offers under the CrudePLUS* umbrella, for the rapid determination of instability and fouling potentials for any crude oil, slop or cut, by themselves or in a blend, either using fresh crude samples to generate their unique fingerprints or by using previously fingerprinted crudes in our database to simulate the blends and their properties in the virtual world. With that information, CrudePLUS are also able to od to do contrained optimizations to minimize instability and/or fouling potential for any blend. In the absence of samples, we can also do general estimations using crude assays.

Please let me know if you are interested in more information.

Nov-2021