Acid Gas Injection for Enhanced Oil Recovery and Long-Term Storage in Zama Pinnacle Reefs
One of the Plains CO2 Reduction (PCOR) Partnerships key demonstration activities is working with ApacheCanada on the Zama Acid Gas Project. Apache is currently injecting acid gas (Carbon Dioxide [CO2] andhydrogen sulfide [H2S]) into six pinnacle reefs in the Zama Field in northwestern Alberta, Canada. Inaddition, there are more than 600 carbonate pinnacle reefs in the Zama Field, with documented estimatesof original oil in place exceeding 1 million barrels each. This project aims to better understand the injectionand long-term storage of acid gas and the enhanced oil recovery (EOR) potential in the active acid gasinjection pinnacles and to better understand and predict the EOR and storage potential in the Zama Fieldand other pinnacles worldwide.A rigorous methodology of characterizing the six pinnacle reservoirs with the aim of better understandingthe potential for acid gas injection for EOR and CO2 storage potential was developed. A detailed fluidmodel was constructed that accounted for the effects of H2S and gas liberation on minimum miscibilitypressure. Reservoir simulation models were constructed to investigate optimization of EOR potential andestimate CO2 storage capacity under various scenarios. The models were history-matched, and severalpredictive scenarios were run, focusing on both oil recovery and CO2 storage.These efforts show promise to succeView/Download Document
Event/Meeting Information
PCOR Partnership 2014 Annual Membership Meeting
9/16/2014
Denver, CO