This paper presents the results of successful applications of inorganic gels to control water production. In naturally fractured reservoirs a case study with hostile high temperatures (260-310 °F) found in the Cretaceous and Jurassic dolomitic limestone's of the south east of Mexico is presented together with a water exclusion case from the tertiary sandstones. Importance of gel penetration and selective placement to considerably delay the water percolation to upper intervals in hydraulically communicated intervals is discussed. Included are alternatives for control of gel invasion from the high conductivity fracture network to the tight matrix. Finally, the paper presents a brief discussion of the future of water control in naturally fractured reservoirs.

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