The cementing additives range is specially engineered for oil and gas well cementing applications to enhance slurry performance under diverse downhole conditions. The portfolio includes silica, microsilica, fly ash, metakaolin, slag, and rice husk ash derivatives. These additives enhance performance by improving strength development, reducing permeability, controlling density, and increasing thermal stability. Designed to meet API standards, they ensure reliable zonal isolation, optimised rheology, and durability in HPHT environments.
Oil & Gas
Why Cementing Additives is the preferred choice for oil & gas formulations
Comprehensive range of Cementing Additives grades for diverse industrial applications
Reactive silica additive in 5, 25, and 45 micron grades for well cementing. Prevents strength retrogression in HPHT cement, improves compressive strength, reduces permeability, and enhances thermal stability for long-term zonal isolation.
Densified microsilica (silica fume) for premium well cementing applications requiring maximum strength development, ultra-low permeability, and superior pozzolanic reactivity in HPHT and CO₂-exposure environments.
Class C or Class F fly ash for well cementing as a lightweight extender and pozzolanic additive. Reduces slurry density, improves pumping rheology, and contributes to long-term strength development.
Reactive alumino-silicate pozzolan for well cementing. Provides excellent pozzolanic activity, improves compressive strength, reduces permeability, and enhances resistance to chemical attack in challenging well environments.
Ground granulated blast furnace slag (GGBFS) for well cementing as a latent hydraulic binder and density modifier. Improves long-term strength, reduces permeability, and is particularly effective in low-temperature and corrosive-fluid-resistant cement formulations.
Reactive amorphous silica from rice husk ash for well cementing as an extender and pozzolanic additive. Provides lightweight density control, contributes pozzolanic silica for strength development, and is used in environmentally preferred cementing formulations.
Common questions about Cementing Additives in oil & gas applications
Find detailed answers about specifications, applications, and technical details.
Strength retrogression is the degradation of cement compressive strength that occurs at temperatures above 110°C. At these temperatures, calcium silicate hydrate (C-S-H) converts to a coarser, weaker crystalline form. Adding 35–40% BWOC reactive silica (MICRON SIL) provides extra SiO₂ that reacts with cement Ca(OH)₂ to form stable, high-strength tobermorite, preventing retrogression.
Class C fly ash (high lime, >20% CaO) has both cementitious and pozzolanic properties and sets without activator. Class F fly ash (low lime, <10% CaO) is primarily pozzolanic and requires Ca(OH)₂ from cement hydration or lime addition to react. Both are used as extenders in well cementing; Class F is more common in oilfield cementing for density reduction and improved slurry rheology.
METACEM is a highly reactive alumino-silicate pozzolan that reacts rapidly with Ca(OH)₂ liberated during cement hydration to form additional C-S-H and calcium aluminate silicate hydrates. This reduces the Ca(OH)₂ content (vulnerable to carbonation and leaching), improves compressive strength, reduces permeability, and enhances resistance to chemical attack in CO₂-containing well environments.
Slag (GGBFS) is a latent hydraulic binder that reacts slowly with water when activated by Ca(OH)₂ or alkalis. In well cementing, slag is particularly useful in low-temperature environments (below 60°C) where it provides excellent long-term strength development, very low permeability, and exceptional resistance to sulphate attack and chloride-rich formation waters.
Microsilica (silica fume) is an amorphous, ultra-fine material with particle sizes typically 0.1–0.3µm — approximately 100 times finer than silica flour. This extreme fineness gives it much higher surface area and pozzolanic reactivity, enabling faster strength development, lower permeability, and superior performance at lower dosages compared to crystalline silica flour.
API 10A (Specification for Cements and Materials for Well Cementing) governs quality requirements for Portland cement and cementing additives used in oil and gas well cementing. Our cementing additives portfolio is designed and tested to meet API 10A requirements, ensuring consistent performance in oilfield applications.
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