The concept of increase oil water ratio is to increase oil volume in the system without any changes in water to meet new oil water ratio.
How can we increase oil water ratio from 80/20 to 85/15?
Let’s make it simple to understand. We start with 100 bbl of mud and we have the following information from the retort analysis.
% by volume oil = 56
% by volume water = 14
% by volume solids = 30
According to this retort analysis (learn how to calculate oil water ratio), the oil water ratio is 80/20 and there are 56 bbl of oil, 14 bbl of water and 30 bbl of solid from 100 bbl of mud. In order to increase oil water ratio, oil must be added and water volume remains the same. Therefore, 14 bbl of water will represent only 15% of water ratio for the new system. We give X equals to the new total liquid volume.
Then; 15 = (14×100)÷X
X = 93.33 bbl
Total new liquid volume is 93.33 bbl
Barrel of base oil added per 100 bbl of mud
Oil added = new total liquid volume – original volume
Oil added = 93.33 – 70 = 23.33 bbl
It means that you need to add oil 23.33 bbl per 100 bbl of original mud without adding any volume of water in order to achieve 85/15 oil water ratio.