An excessive water cut or high gas/oil ratio in a production interval presents a major concern in sustaining oil production, requiring fast and efficient workover solutions to enhance the oil recovery process. Wells in the Cantarell field, a mature depleted field in the Bay of Campeche in the Gulf of Mexico, are facing drastic decreases in their production and an increase in either water cut or gas/oil ratio. Other developed fields in Mexico’s Region Marina, such as the Ku-Maloob-Zaap, have increased their hydrocarbon production through the years with an incipient presence of water and gas. The high water cut and gas increments have had a strong impact on the production strategy, opening the opportunity for application of non-conventional solutions to isolate or abandon production intervals invaded by gas or water and continue production from upper or deeper zones. The pay zones consist of naturally fractured, vugular carbonates with permeability as high as 5 Darcies that involves the following challenges to be overcome in order to succesfully achieve the required isolation: Loss of fluid circulation, high gas presence and lack of primary zonal isolation that results in migration of water or gas to the productive intervals.


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