A properly designed and constructed well is essential for the environmentally sound, safe production of oil and natural gas. Ensuring long-term well integrity, the ability of a well to provide effective barriers for containment of well fluids and pressures throughout the well’s lifecycle, is a vital part of well design and construction.
Properly designed, constructed, and maintained wells safeguard workers and communities, minimize risks of leaks and spills, protect water resources, are safer to operate and have lower probability of long-term failure.
Key observations from our on-going work:
Ensuring the ability of a well to provide effective barriers for containment of well fluids and pressures throughout the well’s lifecycle is a vital part of well design and construction.
Design considerations begin with initial site selection and permitting through to the end of productive life of each well and its permanent closure.
Identifying active and abandoned wells or other geologic features in a well-defined area of investigation before commencing construction of a new well can eliminate risks.
Proper casing and cement barriers are essential components of long-term well integrity, and the proper placement of them during well construction is critical.
Advances in techniques and technology are enabling multiple recovery zones, as result, the drive for well integrity over the life of each well should extend to cover remedial operations such as work-overs with hydraulic fracturing and re-completions.