The Well Integrity Blog by Wellcem Desert

Gas migration: A potential disaster

Posted by Svein Normann on 24.07.2018

Gas migration is a well-known phenomenon in oil and gas wells around the world. Probably because it is very common. You must know what it is and how it occurs.

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Mixing energy in cement and its effect

Posted by Svein Normann on 08.03.2018

Mixing energy during cement mixing, what is it and why is it important? What can be done to control it?

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Free water in cement slurries for oil and gas wells: Big trouble?

Posted by Svein Normann on 06.10.2017

A cement slurry is basically made up of dry cement mixed with water in a correct ratio. Free water (or free fluid) is not the best-known property of a cement slurry. It often gets overlooked, and...

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Lab tests to review when designing a “gas-tight” cement slurry

Posted by Miguel Diaz on 13.09.2017

In last week's article, we discussed the mechanism of gas migration through a cement slurry. What we left for this week are the three most important lab tests to review when designing a...

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Gas tight slurries

Posted by Miguel Diaz on 06.09.2017

Following the article from my colleague, Svein Normann, on how gas migration during and after a cement job could lead to a catastrophic disaster, we received a significant amount of questions on...

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Gas migration can cause a disaster

Posted by Svein Normann on 14.08.2017

Gas migration is a well-known phenomenon in oil and gas wells around the world. Probably because it is very common. You must know what it is and how it occurs.

 

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Free water in cement slurry: Why is it critical?

Posted by Svein Normann on 26.06.2017
Free water (or free fluid) is not the best-known property of a cement slurry and it often gets overlooked. Sometimes free water content can be critical.

First of all - what is it? Free water is...

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