Self-healing cement system
Ensure long-term zonal isolation and well integrity from production to abandonment and beyond.
CemFIT Heal flexible self-healing cement system helps ensure well integrity from drilling to abandonment, providing a competent annular pressure seal and protecting against hydrocarbon leaks and sustained casing pressure (SCP) at the wellhead.
With conventional cement, a cement sheath failure such as a crack or microannulus results in a hydrocarbon leak or SCP at the wellhead. The CemFIT Heal system is the only cement system in the industry that not only withstands wellbore stresses but, should any isolation defects appear, repairs itself on contact with oil or gas irrespective of methane content.
Unlike conventional cement systems, the CemFIT Heal system expands after setting, improving cement bonding and sealing microannuli that can cause unwanted gas migration. A low Young's modulus enables it to withstand cement sheath stresses (due to drilling, perforating, injection, hydraulic fracturing, underground gas storage, and changes in temperature, pressure, or both).
In the event of a hydrocarbon seep due to cement sheath failure (crack or microannulus), the set cement responds on contact with hydrocarbons and autorepairs the pathways, restoring the hydraulic integrity of the well. The self-healing action is repeatable multiple times if annular integrity is compromised again during the life of the well.
The cement job is simple to design; slurry properties can be easily adjusted to accommodate changes to cement designs and job programs. The CemFIT Heal system is also easy to blend and mix using conventional equipment, making it suitable for large-scale use.