Tuesday, June 11, 1:00pm

Professor Ian Hutcheon

Professor of Geochemistry, Dept. of Geology and Geophysics, University of Calgary CRC LEME, Geoscience Australia
 

Sources and Sinks of CO2 in Petroleum Reservoirs - Potential for Geological Storage  
 

Abstract

Geological storage of CO2 is viewed as a means of meeting CO2 reduction targets. The concept of geological storage can be understood by examining the sources and sinks for CO2 in petroleum reservoirs in deep sedimentary basins. Some sedimentary rocks can buffer the CO2 content by mineral reactions. Understanding the mechanism of such reactions tells us the origin of CO2 and gives a scenario to "store" CO2 in deep petroleum reservoirs.

The distribution of CO2 and H2S in the Western Canada Sedimentary Basin suggests that reservoir rocks, such as carbonates or pure quartz sandstones that are free of "buffering minerals", are not ideal for storage of CO2. Enhanced oil recovery by injection of large volumes of CO2 into a carbonate reservoir in Weyburn, Saskatchewan has provided a field test of the theory. Monitoring of fluid properties shows that reactions take place within months and that the theory of how CO2 addition affects rock reactions can explain the changes in fluid properties observed at Weyburn, giving insight to how CO2 interacts with the reservoir.

Biography of the Speaker

Ian Hutcheon received BSc, MSc and PhD degrees in Canada. He joined Univ. of Calgary in 1978 after working as a field geologist for government and industry. He has worked at Shell Canada, Imperial Oil and PanCanadian (now EnCANA) on various research and development projects ranging from exploration, reservoir assessment, formation damage and steam-assisted EOR. Current research focuses on reservoir effects of CO2 for EOR, fluid flow in sedimentary basins and groundwater geochemistry.