The Well Integrity Blog by Wellcem Desert

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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Resins for Well Integrity Challenges: Curing process

Posted by Minli Xie on 22.02.2018

Resin chemistry, including epoxies, phenolics, and furans, has been widely utilized in a variety of applications in well construction, completion, and production. This broad class of thermosetting...

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This is how we dealt with sustained casing pressure

Posted by Morten Evensen on 08.02.2018

We are situated on a platform in the Dutch sector of the North Sea. During pressure bleed-off of the annulus, both gas and oil-like fluid has been observed. The situation is unwanted and it can...

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Plug and abandonment: Coiled tubing

Posted by Johan Bracamonte/Miguel Diaz on 25.01.2018

Here we are, at last, with the final piece of our series on Plug and abandonment of oil and gas wells. We went through legislation and design, guidelines and best practices, materials and the PWC®...

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An effective alternative to conventional plug and abandonment 

Posted by Miguel Diaz/Dave Ringrose on 11.01.2018

This article is a direct result of inspiring presentations on a novel technology from the 2nd Annual Well Intervention Workshop for the Middle East in Abu Dhabi. What I picked up there, made me...

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Depleted Reservoirs: Plugging problems and solutions

Posted by Colin Beharie on 28.12.2017

Plugging depleted reservoirs can be a challenge. Many operators spend lots of money and effort to solve the associated P&As.

Therefore, it is essential to identify the potential difficulties that...

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Plug and abandonment of oil and gas wells: Different materials

Posted by Miguel Diaz on 21.12.2017

Cement IS NOT the only material for well abandonment. In this article, we will address the doubts around the material that could be placed in the hole as a barrier for plug and abandonment, and...

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Fluid Loss in cement slurries for oil well applications

Posted by Svein Normann on 12.12.2017

Cement slurry as mixed on rigs for oil well applications is a pumpable liquid consisting of water and various particles in a suspension. If this liquid is exposed to a differential pressure across...

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Ensuring successful blend quality of the oil well cement

Posted by Miguel Diaz/Kevin Mohammed on 05.12.2017

“Cement is by far the most important binding material in terms of quantity produced; indeed, it is possible that it may be the most ubiquitous manufactured material.” With these lines, Michaux,...

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Why cement flexibility is critical to well integrity

Posted by Johan Bracamonte/Miguel Diaz on 30.11.2017

Cement is critical to well integrity. It provides hydraulic isolation, preventing fluid flow between producing zones, groundwater aquifers, and the surface. But the cement sheath is not always...

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