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 …

During large-scale multistage hydraulic fracturing in shale-gas wells, the cement sheath
loses its integrity easily because of repeated temperature and pressure variations in the …

The cement-casing interface, or microannulus, has been identified as a common pathway
within wellbores for leakage of fluids yet little is known about its size or character. We …

This paper focuses on the effect of repeated loading and unloading conditions on cement
sheaths during staged fracturing. Triaxial compression and cyclic loading/unloading tests …

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 …

In conventional wellbore-integrity analysis, the cement sheath's initial state of stress and
transient thermoporoelastic effects are often neglected. However, the initial state of stress is …

Cement sheaths are among the most important barrier elements in petroleum wells.
However, the cement may lose its integrity due to repeated pressure variations in the …

Well abandonment operations can be very time-consuming and costly, and thousands of
wells need to be permanently plugged and abandoned offshore Norway during the …

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 …