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...

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®...

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...

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...

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...

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...

“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,...

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...

Well integrity or leaks have well safety and environmental aspects. But aspects related to production, reputation and asset value are also important.

Have you ever wondered what tests you should (or could) ask the lab to run when you are preparing for a cement job? Have you ever been part of an argument around a lab test result because it may...