cement — Oil & Gas Glossary

A generic term used to describe Portland cement used in oil- and gas-well applications. In its simplest form, cement powder is ground from kiln-fired limestone and clay. However, modern oilfield cements are precise blends of quality assured materials to achieve consistent and predictable performance. Cement sets as the water in the slurry reacts chemically with the active ingredients, the most

Detailed Explanation

significant of which is tricalcium silicate reacting to create calcium silicate hydrate. Cement additives are used to control the setting process of the cement slurry and enhance the performance of the set cement. The API has developed a classification system for oilwell cement specification and performance.