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Deepwater Cementing
Spotlight
FlexSTONE
Sealant system that matches mechanical properties to the downhole stress environment.
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Deep water is one of the most technically and logistically challenging environments for cementing operations because of the risks associated with the conductor and surface casing cementing. Understanding these technical challenges is key to designing cement slurries that can meet deepwater specifications and provide required zonal isolation.
Deepwater technical challenges
- Low temperatures
In the cold temperatures of the deepwater environment, cement takes longer to set and achieve the required compressive strength.
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DeepCEM
Additives for shallow flow prevention and enhanced strength at low temperatures.
- Low fracture gradient
To avoid inducing losses caused by the narrow margin between the pore pressure and the fracture gradient, a low-density cement system helps ensure cement coverage across the zones of interest.
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Foamed cement
A coarse dispersion of base slurry, gas, foaming surfactant, and other materials to provide foam stability.
- Shallow flow hazards and gas hydrates
Failure to control can lead to serious consequences such as well control risks, excessive hole washouts, and destabilization of near-wellbore formations.
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FlexSTONE
Advanced sealant system that matches set-cement properties to the downhole stress environment of well.
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