Every other year the Oil and Gas Journal presents a summary of worldwide enhanced or improved oil recovery (EOR or IOR) methods and current production. Other papers review EOR technologies and present usage, both in the US and worldwide. Our intent was not to duplicate this type of documentation but to review CO2 as a maturing EOR process and to assess what was going well in the field as well as what was not going well, to identify research opportunities, and to develop correlations between problems encountered and solutions developed. A survey was sent to a number of engineers responsible for day-to-day operations of CO2 floods. This paper reviews the response received concerning 25 projects. Represented in the responses are experiences from 25 fields by 19 different engineers employed by nine oil companies.