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 […]
All you need to know about Bentonite in Cement Slurries
Let’s just have a quick overview regarding the bentonite. It is easy to find references online regarding bentonite as a cement extender, the way it works or I should say reacts and why additional water is required when using it as an extender. Here I will try to be simply explain. First of all, Use […]
Balanced-plug method. Basic calculations
Free Balanced Plug Calculator at the end of this post. Check it out ! The most common placement method is the balanced plug technique. The work-string is run into the wellbore to the desired depth for the plug base. Contamination or mixing with the control fluid is avoided by the use of appropriate volumes of […]
Highly deviated or Horizontal well section abandonment?
I have to be honest, it is only recently that I had the opportunity to place frequent cement plugs in such conditions and purpose. Yes, I did those only occasionally before … However, “Frequency” is important, and beside what everybody knows (so-called best practices) Frequency is how the significance of all the variables can be […]
Drill deeper or just plug it off?
A quick reminisce… Over the years, I have had the opportunity to work with many drilling teams. I have to say, some of them still occupy a very special place in my heart. Not only because of the quality of the people I had the pleasure of working with; but also for the amazing things […]
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 […]
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