Halliburton has strengthened its growing carbon capture, utilisation and storage (CCUS) portfolio with the introduction of the CorrosaLock cement system for CO2 storage, providing corrosion resistance for long-term barrier support
The CorrosaLock cement system is a composite of Portland-based cement and Halliburton’s proprietary WellLock resin system. It is tailored to provide excellent chemical resistance to CO2 and enhanced mechanical properties that minimise the impact of cyclic loading on the mechanical integrity of the cement barrier. The incorporation of resin generates a film on the composite surface that creates a coating effect that aids in bonding. Resin also reduces the system’s effective porosity and forms an adhesive layer to help protect cement CO2 degradation. The result is enhanced cement sheath elasticity and shear bond strength that allows the barrier to better withstand downhole forces during cyclic injection and provide increased anchoring force to the formation when compared to conventional cement systems.
Unique Challenges
“Cementing wells for CCUS presents unique challenges,” said Matt Lang, vice-president, Cementing at Halliburton. “These projects aim for permanent underground CO2 storage, which requires long-term cement sheath integrity. The significant permeability reduction and enhanced mechanical properties of our CorrosaLock system address those challenges for our customers and builds on Halliburton’s decades of experience designing annular barriers for corrosive environments.”
