This was a pilot-scale project that involved utilization of acid gas (approximately 70% CO₂ and 30% hydrogen sulfide) derived from natural gas extraction for enhanced oil recovery. Project objectives were to predict, monitor, and evaluate the fate of the injected acid gas; to determine the effect of hydrogen sulfide on CO₂ sequestration; and to develop a "best practices manual" for measurement, monitoring, and verification of storage (MMV) of the acid gas.  Acid gas injection was initiated in December 2006 and resulted in sequestration of about 85,000 tons of CO₂ over the life of the project.

Recognized by the Carbon Sequestration Leadership Forum (CSLF) at its Paris meeting in March 2007.

Links to more information:

• Zama CO₂ EOR pilot project
• Project presentation
• Poster from Paris workshop (March 2007)