Continuing with this 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 are intended for well abandonment. Cement Slurry […]
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
This injectivity test page is the start of a series of posts covering cementing techniques applicable during workover, including specific job requirements, fluid characteristics, and testing procedures. We will cover each of the following job categories: Remedial cementing, well abandonment, and fluids control/shut-off. I am initiating this series of posts, (you can find links to […]
Sample Cement Job Evaluation
Pressure analysis of a 9 5/8” casing cementing operation. Information gathering for cement evaluation starts with the basic details of the job design, including casings information, wellbore details, formation and temperature pressures. Proper post-job analysis continues with kind of an investigation process where key information is gathered from job reports from different sources, including cement […]
New CemPRO+ Review
Following my CemPRO+ review post a little more than two years ago, I have broadened my knowledge of this cementing application, not only providing engineering and post-job analysis to my customers but also and during some time, actively designing cement jobs in an ongoing busy operation. Furthermore, I even found myself in the middle of […]
Horizontal or highly deviated well section abandonment?
This is a guide for those who are facing plugging and abandonment challenges of a horizontal or deviated welI. To be honest, it is only recently that I had the opportunity to place frequent cement plugs in such conditions and for good purpose. Yes, I did those only occasionally before … However, “frequency” is important, […]
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