Silica Fume For Oil And Gas Well Cementing
Silica fume is a finely divided, amorphous silica material that is commonly used as a pozzolanic admixture in oil and gas well cementing applications. It is a byproduct of the silicon and ferrosilicon alloy production process, and it consists of particles that range in size from 0.1 to 5 microns in diameter.
Description
Products Description
Silica fume can improve the performance of oil and gas well cementing by enhancing the properties of the cement slurry. For example, it can increase the compressive strength, reduce permeability, and improve the durability and resistance to chemical attack of the hardened cement paste. Additionally, silica fume can also help to reduce the heat of hydration and mitigate the risk of gas migration.
The use of silica fume in oil and gas well cementing is subject to strict quality control measures, as it must meet specific standards for chemical composition, surface area, and other physical properties. It is typically added to the cement slurry in small quantities, ranging from 5 to 15 percent by weight, depending on the specific application and desired properties.
Specfication
| Chemical &Physical Analysis | ASTM C1240-11 | EN 13263:2005 |
|
/ |
Spec. Frequency | Spec. Frequency |
|
SiO2 (%) |
>92.0 300MT
|
>92.0 Weekly |
| So3 (%) | / | <3.0 Weekly |
| Cl (%) | / | <0.3 Weekly |
| Free CaO (%) | / | <1.0 Weekly |
| Free Si (%) | / | <0.4 Monthly |
| Alkalies(as equivalent Na2O %) | Report 300MT | / |
| Moisture(%) | <1.0 300MT | / |
| Loss on Ignition,LOI(%) | <4.0 300MT | <4.0 Weekly |
| Specific surface(BET -M2 /GRAM) |
>18 2200MT/3 months | 15-35 Monthly |
| Bulk density(kg/m3) | Report 300MT | / |
| Pozz.Activity Index(%) - 7 days accelerated curing | >110 2200MT/3 months | / |
| Pozz.Activity Index(%) - 28 days accelerated curing | / | >100 Monthly |
| Retained on 45 micron sieve (%) | <10 3 00MT | |
| Variation from avg.retained on 45 micron (%) | <2 avg.of last 10 tests | |
| Density(kg/m3 ) |
Report 300MT |
Products Description
1. Silica Fume for Oil and Gas Well Cementing is a high-performance mineral admixture that is designed specifically for use in oil and gas well cementing applications
2.Silica Fume for Oil and Gas Well Cementing is a highly reactive pozzolan, which means that it reacts readily with calcium hydroxide to form additional cementitious compounds.
3. This product is extremely fine-grained, which allows it to penetrate deep into the pores and fine cracks of the cement matrix.
4.Silica Fume for Oil and Gas Well Cementing contributes to excellent rheology control, which allows for more precise placement of the cement in the wellbore
5.This product has a low permeability, which helps prevent the leakage of gas and fluids from the wellbore into surrounding formations.
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