There is an upcoming" P&A wave" of wells that need to be permanently plugged and
abandoned, especially in mature, offshore areas such as the North Sea and Gulf of Mexico …

We present a review of plug and abandonment (P&A) practices in onshore wells, with a
particular focus on British Columbia (BC). Regulatory and operational practices are …

The annular cement sheath is one of the most-important well-barrier elements, both during
production and after well abandonment. It is, however, well-known that repeated pressure …

The mechanical integrity of cement sheath during reservoir stimulation is critical for oil and
gas wells. It is essential to optimize and design a cement slurry system that not only meets …

Wellbore leakage is complicated to understand due to the range of potential leakage
pathways and uncertainties regarding their capacities. In this study we present a novel …

Anthropogenic activities increase methane emissions, contributing to greenhouse gas levels
and adversely affecting the environment. Abandoned oil and gas wells potentially leak …

In past years, the industry has focused on ensuring that cement is efficiently placed in the
wellbore and that it does not become mechanically damaged during the life of the well …

Well drilling, completions, stimulation, and enhanced oil recovery operations induce
downhole conditions that may negatively impact the integrity of the annular seal and …

The loss of well integrity in oil and gas and CO 2 injection wells provokes leaks that
potentially pollute underground water reservoirs and the surrounding environment. The …

Squeeze cementing is a process used to repair leaking oil and gas wells, in which a cement
slurry is driven under pressure to fill an uneven leakage channel. This results in a Hele …