Continuing with these series of posts covering some of the cementing techniques applicable in workover operations, I want to talk further about plug cementing. In previous posts, I have covered extensively plug cementing. This time I am providing information regarding laboratory testing and some considerations when cement plugs intended for well abandonment. Cement Slurry Properties […]
Workover Cementing Techniques. (2) Squeeze Cementing
Squeeze cementing is basically a filtration process that occurs during the placement of the cement slurry into a wellbore entry point (casing leak, existing perforations, etc.) under sufficient differential pressure. The cement slurry is held in place until it cures and establishes a hydraulic seal. Look at this picture in Squeeze Cementing Principles explaining the […]
Workover Cementing Techniques. (1) The Injectivity test
I want to present a series of posts covering cementing techniques applicable during workover, including specific job requirements, fluid characteristics, and testing procedures for each of the following job categories: Remedial cementing, well abandonment, and fluids control/shut-off. I am initiating this series of posts, with an essential step in remedial cementing and the squeeze process: […]
Balance to succeed: Cement Plugs in losses situation
Loss circulation challenges During my time in Mexico, one of the main challenges That we faced was severe loss circulation. In new wells, due to the presence of fractured carbonates and low formation pressure (LPHT), several actions were usually in place. Examples include managed pressure cementing (cementing taking advantaged of MPD equipment/practices). Or the use […]
Suicide Squeeze Cementing: risky but valid
More technically, a ‘suicide squeeze’ is an application of a circulating squeeze, used in specific circumstances. In general, squeeze cementing is a fascinating topic, and an important skill to master for any experienced cementer. In a circulating squeeze, the cement slurry is ‘forced’ to flow through a lower open path and up behind the casing with […]
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