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Q. In an oil reservoir, the residual oil saturation in the volume flooded with polymer solution is 20%. The initial water saturation is 20%. The volumetric sweep efficiency is 50%. The maximum possible recovery factor for the reservoir is _______% (round off to 1 decimal place).
Ans: 36-39
Sol:
![](https://www.gkseries.com/blog/wp-content/uploads/2023/09/Screenshot-751.png)