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 …

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 …

Cement sheaths undergo extreme loading conditions in wells during subsurface operations.
A damaged cement sheath may lead to fluid communication between different formation …

With the increased exploration activity in unconventional and extreme operational
environment, well integrity is becoming a challenging problem. Cement sheath, being an …

When the integrity of the annular barrier outside the casing is degraded, parts of the casing
in the abandoned well must be milled to place a permanent barrier. Considering the micro …

Well integrity represents an objective/solution for protecting human life and environment
while retaining oil production rate during the life of the well. Characterization of cement …

Leakages of greenhouse gases, such as methane and carbon dioxide from wells, may have
considerable environmental consequences. Although much emphasis is currently put on …

CO 2 geological sequestration technology injects CO 2 into the target geological formation
through a borehole. Usually, cement plugs are used to seal the well after finishing the …

In this paper, the effects of formation water on the construction quality of the cement-
formation interface under static and water disturbance conditions were studied. The critical …

Maintaining sealing integrity of cement sheath is essential to oil and gas well completion.
The development of large-scale hydraulic fracturing reservoir stimulation technology in …