Schlumberger declares the release of EverCRETE* CO2–resistant cement. This new product is specifically engineered to ensure long-term zonal isolation in wells with high concentrations of carbon dioxide in either wet or gaseous states.

The cement system is highly resistant to CO2 attack under wet supercritical CO2 and CO2 -saturated water conditions. These conditions, typically encountered in carbon geological storage projects or CO2 injection well applications, cause rapid degradation of standard oilfield cements.

EverCRETE cement can be prepared in a standard bulk plant and its density can be tailored to most well requirements. The new system can be pumped as a tail-slurry across the CO2 injection zone or used as a lead-slurry to protect the casing string from CO2 attack in front of any reservoir with CO2 content, all using standard equipment.

“The development of EverCRETE cement is one of many innovations undertaken by Schlumberger in support of the company’s new Carbon Services initiatives,” said Patrick Schorn, president, Well Services, Schlumberger. “To be effective, storage wells must be able to maintain stable, leak-free conditions for hundreds of years.” he said.

Tags: Schlumberger