High water cut reservoir

Hi all
I am working in the field sufering from high WC after 10 years of production with current recovery factor of 23%, reservoir is sandstone with high permeability and prosity with mediam API oil. The problem is how to mitigate this high WC and inprove the recovery. By the way horizontal wells giving high WC also.

You need to understand the geology. As a reservoir engineer, it is not your responsibility to create the static model, but it is your responsibility to understand it. You must have a mental image (like a crayon drawing) of how the flow units are connected, and where/how the fluids are moving.

Once you (think you) understand where the water is coming from, and importantly where the remaining oil resides (and why its not being swept) then you are on your way to crafting a strategy to recover some remaining oil.

The fact that you asked this question with so little additional information about the scenario indicates that you don't understand this

I would wager that in the process of thinking trough this enough to describe properly in an online posting, you would probably answer the question yourself.

Thanks Vinomarky to your very good elaboration, and as you said the geology of the reservoir is not fully understood, although there is denth wells drilled in the field. The other Problem is how to locate remaining oil areas, and how to determine Sor, I need adivces to how determine remaining oil and Sor, and if there is water coning or field already watered out.

Please re-read my first post