Schlumberger Introduces CO2-Resistant Cement
Posted on August 26, 2008 – 10:11 am | by oilandgaspress.com
Long-term zonal isolation for carbon sequestration or CO2 injection wells is assured with new compatible cement formula
HOUSTON, August 25, 2008 - Schlumberger announced today 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.
Extensive lab-testing of EverCRETE cement was performed under diphasic conditions (wet supercritical CO2 and CO2 water saturated) up to 110°C (230°F) and 280 Bar (4,061 psig). These tests positively demonstrated no signs of degradation.
Schlumberger formed its Carbon Services group with the goal of researching and implementing the use of appropriate sites, technologies and techniques to provide comprehensive CO2 geological storage solutions. EverCRETE cement is a key enabling technology in this endeavor. For more information about EverCRETE cement, visit www.slb.com/evercrete.
About Schlumberger
Schlumberger is the world’s leading oilfield services company, supplying technology, information solutions and integrated project management that optimize reservoir performance for customers working in the oil and gas industry. The company employs more than 84,000 people of over 140 nationalities working in approximately 80 countries. Schlumberger supplies a wide range of products and services from seismic acquisition and processing; formation evaluation; well testing and directional drilling to well cementing and stimulation; artificial lift and well completions; and consulting, software, and information management. In 2007, Schlumberger revenue was $23.28 billion. For more information, visit www.SLB.com.
For further information, contact:
Susan Ganz
Media Relations Manager
Schlumberger Oilfield Services
+1 281 285 8245
sganz1@slb.com
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Tags: Cement, Schlumberger
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