Identification and evaluation of well integrity and causes of failure of well integrity barriers (A review)

Continuous evaluation and monitoring using different logging techniques and tests during drilling, completion, and production are required to address the issues that compromise the robustness of the well integrity. Nuances of the interpretation of multiple well logs must be understood in order to effectively respond to the potentially damaging situation, without risking the amplification of negative downhole conditions. Well integrity compensatory factors such as pressure, temperature, chemical changes, corrosion are interdependent. For instance, the variation in temperature or chemical changes will affect the extent of corrosion, hence a comprehensive design and monitoring system is essential to clearly understand the well integrity issues. This paper presents a broad review of research and field experiences related to well integrity.