Role of Well Integrity in Meeting Production Mandates: Prevention of Well Barrier Failures

The global oil and gas industry is increasingly challenged to sustain and maximize production under heightened economic, environmental, and regulatory pressures. Within this context, well integrity emerges not only as a safety-critical discipline but also as a central enabler for production efficiency, asset longevity, and operational continuity. This paper explores the role of well integrity in achieving production mandates, emphasizing the significance of preventing integrity failures through proactive methodologies such as Root Cause Analysis (RCA). Well integrity, defined by ISO 16530-1 as "the application of technical, operational, and organizational solutions to reduce the risk of uncontrolled release of formation fluids," directly affects an operator's ability to maintain stable production. An integrity-compromised well can lead to shut-ins, production losses, environmental hazards, and expensive remediation activities. Main well integrity concept assumes continuous maintaining of two barriers between the pressure source and the environment. Those barriers might degrade with time due to insufficient material resistance to the environment, resulting in issues such as sustained casing pressure (SCP), casing corrosion, poor cement bonds, and equipment malfunction. Those well barrier failures have historically contributed to non-productive time (NPT) and deferred production. Based on the case studies reviewed, wells with barrier failures contributed to significant downtime and production deferral. As a result, improving well integrity processes becomes a strategic production assurance imperative.