Large Volumes of Carbon Dioxide in Sedimentary Basins

Abstract

Carbon dioxide (CO2) is encountered in many sedimentary basins around the world in a variety of geological environments (e.g. Southeast Asia, Italy, Eastern Australia). Data on CO2 occurrences almost invariably come from petroleum exploration activities and are limited by operational and commercial constraints. Where CO2 is abundant it is effectively a natural 'pollutant' which reduces the worth of the hydrocarbon gas present by diluting it and increasing production costs. However large volumes of CO2 are rare with the probability of there being >1% CO2 being less than 1