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What is Microblock®?
Microblock® is a slurrified multibenefit additive composed of specially selected and processed microsilica. (SiO 2).
Microsilica® is a mineral composed of ultrafine amorphous (non-crystalline) spheres of silicon dioxide.
The large surface area (21 m2 /g) and high content of amorphous silicon dioxide (89-90% SiO 2) give Microblock superior pozzolanic properties.
The microsilica will react with the calcium hydroxide given off by cement hydration and form more of the calcium silicate hydrate (C-S-H) crystal structure that binds cement, increasing the com-pressive strength of the set cement.
The silicon dioxide in Microblock® is present in an amorphous, non-crystalline state. Microblock® is for this reason considered non-hazardous to health.
Please refer to our MSDS for additional informa-tion.
Microblock® operational benefits Microblock® consists of spherical particles of Microsilica containing 89-90% of amorphous SiO 2 . The particles are of sub-micron size, 0,15 "m, resulting in a large surface area of 21 m2/g. These specific particle characteristics provide Microblock with a number of operational benefits:
- Zero free water
- Low fluid loss
- Low viscosity
- Early strength development
- High compressive strength
- Improved bonding
- Stable cement slurry
- Corrosion resistance
Although Microblock® was developed as an anti-gas migration additive, the companies that used the product realized that it is more that that. It is the multi-benefit additive that can be used in a variety of well cementing applications.
Ref: WDP (22.08.02)
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MicroBlock® Gas tight cement
In gas and oil bearing formations there is always a risk for gas migration during drilling and production.