In this article, the major reference guides for Well Integrity are presented. These guides can be considered as reference documents as well as a basis for training classes on the subject of Well Integrity.
The standard defines the minimum functional and performance oriented requirements and guidelines for well design, planning and execution of safe well operations. The focal of the standard is well integrity.
Well integrity is defined to be “application of technical, operational and organizational solutions to reduce risk of uncontrolled release of formation fluids throughout the life cycle of a well”. The standard focuses on establishing well barriers by use of WBE’s (well barrier elements), their acceptance criteria, their use and monitoring of integrity during their life cycle. The standard also covers well integrity management and personnel competence requirements. The standard does not contain any well or rig equipment specifications.”
According to Norsok D-010, well integrity is defined as the “application of technical, operational and organizational solutions to reduce the risk of uncontrolled release of formation fluids and well fluids throughout the life cycle of a well”.
Well Integrity is defined in ISO/TS 16530-2 as: “containment and the prevention of the escape of fluids (i.e. liquids or gases) to subterranean formations or surface”
In API RP 65-2, well integrity is defined as: “a quality or condition of a well being structurally sound with competent pressure seals by application of technical, operational, and organizational solutions that reduce the risk of uncontrolled release of formation fluids throughout the well life cycle “.
Following from the aforementioned definitions of well integrity, the personnel planning the drilling and completion of wells will have to identify the solutions that give safe well life cycle designs that meet the minimum requirements of the standard.