Lightweight cement system designed to cure losses in large fracture voids and highly porous formations.
We specially designed the SentinelCem cement system to cure losses and enable further drilling to help achieve zonal isolation by accomplishing intended top of the cement. The solution is applicable for any type of loss and is very effective for severe to total losses where particulate materials alone are ineffective.
SentinelCem cement achieves a 10-second gel strength of 42 lbf/100ft2 and a 10-minute gel strength of 105 lbf/100ft2, reaching compressive strength of approximately 50 psi in 4 hours.
SentinelCem cement achieves a gel state and then regains fluidity for circulation when shear is applied. When the shear rate is high, the viscosity is low and the slurry flows easily for placement. When the shear rate is reduced, the slurry thickens and gels, resisting slurry flow back, fall back, or formation influx.
Reduction of losses
Max temperature performance
Pumpability through BHA
The SentinelCem cement system contains selected components that impart the needed rheological and mechanical properties to help cure losses. SentinelCem cement can be made acid soluble and hence can be used across producing zones. Easy to mix, SentinelCem has a low viscosity to aid in full-coverage placement while pumping and develops early static gel strength and compressive strength. These properties help in curing losses when the slurry enters the fractures and small or medium vugs.
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