Abstract
Well integrity management (WIM) is predominantly viewed from a perspective in which technical, mechanical, and operational solutions are applied to help reduce the risk of uncontrolled release of wellbore fluids at unwanted times throughout the life of a well. Wellhead integrity, completion integrity, and zonal isolation are a few of the key performance indicator (KPI) parameters considered. This paper discusses WIM from a drilling fluid management perspective. Drilling fluid loss (lost circulation), if not properly addressed at the correct time, can lead to significant well control issues. Particulate lost circulation materials (LCMs) have been in use to manage lost circulation for many years. This paper discusses preventive (proactive) and remedial (reactive) operational strategies to deal with such issues.
Preventive strategies are employed to help reduce the potential for lost circulation. This strategy involves the initial consideration of lost circulation management from the wellbore planning/design phase. Improved drilling practices can be emphasized and planned by examining drilling fluid hydraulics and all other fluid engineering aspects. Finally, effective preventive engineered solutions can be considered and made available to manage losses well before they are encountered. Conversely, a prudent engineer will have remedial strategies in place if the preventive plan does not work. This strategy also includes loss contingency plans to be in place if unexpected loss events occur. Examples are discussed with respect to how previous knowledge and lessons learned can play a critical role in developing contingency plans to effectively manage losses when they occur.
In summary, this paper discusses WIM from a drilling fluids perspective and, more specifically, through managing drilling fluid losses. The preventive and remedial operational strategies presented can be critical in managing drilling fluid losses and helping prevent wellbore stability or well control situations.
