Modified cement composition, preparation and application thereof

摘要

Light to ultra-light cement compositions with modified rheological properties. The cement composition includes cement, hydrophobic nano-silica, at least one additive and a sufficient amount of water to make a cement slurry with high compressive strength, low porosity, low free water, and low fluid loss with a quick thickening time.

主权项

1. A modified cement composition comprising cement, hydrophobic nano-silica, at least one additive and a sufficient amount of water to make a cement slurry, wherein the hydrophobic nano-silica includes a surface area of at least about 110 m2/g, wherein the at least one additive comprises at least one of light weight additive, an anti-foaming agent, a retardant, an accelerator, a dispersant, a fluid loss controlling agent, a surfactant, and a gas migration controlling agent and wherein the cement includes a particle size of from about 10 μm to about 50 μm and the at least one additive includes a particle size of from about 51 μm to about 370 μm.