This paper discusses recent coiled tubing (CT) cement squeeze planning and operations conducted in the Casanare Field in Colombia. Zonal isolation for gas shutoff was identified as a critical factor to help reduce the GOR for wells that would otherwise shut in due to gas handling limits of the production facility. The planning phase included a cement laboratory audit that was used to identify the reason for discrepancies of the cement design between the laboratory conditions and the full scale mixing trial. Voltage variation during laboratory tests was identified as a major factor which affected the mixing energy. Another source of discrepancy between the laboratory results and the sample batches with field equipment was the amount of energy imparted to the system by use of centrifugal pumps. Cement design properties were critical to achieve sufficient thickening time and filter cake quality in the presence of relatively high reservoir temperature and reduced formation pressure. Discretionary disposal of several batches of cement was required until those design parameters were met. Communication and crew training were fundamental to identifying and resolving problems, especially in an area that had not yet conducted this type of operation.

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