Understand The Health of Your Cementing
On Thursday July 30 2020, Oceanit hosted an invitation-only, virtual SPARK day event in partnership with the U.S. Department of Energy and Shell Oil Company. SPARK stands for Special Presentation of Advanced Research and Knowledge. The webinar, hosted by Oceanit’s Houston Manufacturing & Scale-Up Office was recorded and can be viewed below.
Cementing is an essential activity in drilling a well. Cement provides the seal, protection, and support for casing pipe to maintain the strong barriers of a safe, isolated oil or gas well. When done correctly, cement provides mechanical support to the casing, prevents fluid from leaking to the surface, and physically isolates different zones of the well.
When done improperly, or with degradation over time, wells can experience integrity failure when these cemented regions begin to deteriorate or become highly stressed for a variety of reasons, including subsidence and compaction caused by reservoir depletion over the lifetime of the well.
Smart, acoustically responsive Scanite technology is a game-changer for the digital monitoring of well integrity. Scanite technology adds remarkable risk-reduction value; allowing for accurate monitoring and detecting of cement stresses, formation issues, and enhanced well integrity.
To measure well integrity, acoustic tools are used to log the quality and condition of the cement and its bond. However, current acoustic logs do not measure cement quality directly. Rather, well integrity is inferred from the degree of acoustic coupling of the cement to the casing formation.
Scanite allows for immediate analysis and notification of:
- Cement integrity and bonding
- Contamination of placed cement
- Mechanical stresses on the well
When analyzed, cement-bond logs can provide rough estimates of well integrity and zone isolation. However, they are often open to interpretation based upon the cement-casing bond and do not provide a complete picture of cement quality and environmental conditions.
Information from a Scanite digital well can be easily read using existing acoustic logging tools but provides far more insight to operators.
Scanite data is analyzed to directly determine the integrity of the cement, contamination, and most importantly the mechanical loading on the cement. This allows for the improved determination of cement placement, discrimination between fluids and lightweight cement, monitoring of formation depletion and reservoir compaction, and increased knowledge of wellbore mechanical stress states in the oil field.
This vital data is not currently available to well operators today. Scanite can be used to harness the potential of the unified digital oil field by increasing productivity and consistency.
- Directly allows operators to determine the integrity of cement and formation issues (depletion and reservoir compaction)
- Gives accurate monitoring and detecting of cement stresses
- Functions with existing acoustic logging tools, but provides far more insight
- Allows determination of cement placement, discrimination between fluids/lightweight cement, etc.