Literature is plenty of good references, I would recommend you:

SPE 99371: When and where RPM can be successfully applied
SPE 84966: A strategy for attacking excess water production
DOE Report on "Improved methods for water shut-off" available here:

[link Point to another website Only the registered members can access]
More information here:

[link Point to another website Only the registered members can access]
Search SPE OnePetro for more information.