In recent weeks, I received some reader requests to include cement job processes or procedures as reference material on the website. I was initially puzzled about the best way to do that without going into too much detail. I went to work to think of whether a cementing flowchart would capture everything sufficiently. How can […]
Cementing. Challenges across permeable zones
This article will provide you with some actionable suggestions for cementing across permeable zones. In previous posts, I have already talked about the effect of formation permeability on the apparent cement presence behind casing, as seen on cement logs. (See: Excellent cement job, but with terrible results … how is this possible?) Keep in mind that […]
Forensic Cementing
Forensic is a term usually associated with crimes. Criminal forensics is the use of science to investigate a crime, but how is this applicable to Well Cementing? Actually, some well-cementing failures could easily be considered a crime, because of their effect on people, the environment, assets, and companies’ finances. The objective is to thoroughly “collect, […]
Cement Slurry design Basics
First, here is a handy table to simplify the process of cement slurry design: Additive Type Purpose Considerations Extenders IWater, Bentonite (clays), pozzolans, amorphous silica, Sodium Silicate, etc. Reduction of hydrostatic or greater economy.Lower slurry density from less than 15.8 down to 11.5 ppg, typically.Higher slurry yield (more slurry volume per sack). Change slurry rheology […]
Remedial Cementing with Coiled Tubing (animation)
Far from being an animation expert, in my training courses, I always wanted to show my students a video with the complete sequence of the CT cementing process. Now I finally had the time and “patience” to make one. This will be part of a full post on remedial cementing with Coiled Tubing but is […]
Webinar series (III). P&A (Spanish)
I am very happy to present here a webinar series on well cementing for my Spanish-speaking readers. This time from a good friend and former colleague, an expert in well cementing from my Mexico days, now a well-known professional in the Americas. Mr Diego Florez. This third webinar is on Plug and Abandonment Please enjoy […]
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