Coiled-tubing (CT) cementing has been used widely and has been highly successful for remedial squeeze and plugback operations for more than 20 years.However,most of these wells had deviations less than 90°.A long horizontal well in the Alpine field on the North Slope of Alaska was drilled early in the development phase and was out of pattern.The well required a plugback and sidetracking to maintain desired off-take strategy.On the basis of the successful CT squeeze program in Alaska,the decision was made to use CT cement-squeeze technology to seal the lateral portion of the well-bore and leave a cement base for subsequent sidetracking operations.
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