This paper presents an integrated approach to the optimization of properties and volumes of chemicals by the example of water shut-off work-overs in vertical and deviated producing wells completed in sandstone reservoirs. It includes laboratory testing of water shut-off chemicals and mathematical modeling of its injection into the layered reservoirs. Testing the chemicals is necessary to optimize the selection of materials that suit best to the current reservoir conditions, numerical experiments on the presented model allows evaluating the technological and economical effect from the treatment.

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