Two Column Hydrocarbon Recovery from Carbon Dioxide Enhanced Oil Recovery Streams

摘要

A method for recovering hydrocarbons with two multistage columns includes receiving a carbon dioxide recycle stream. The carbon dioxide recycle stream is separated in a first multistage column to produce a purified carbon dioxide recycle stream and a light hydrocarbon stream. The light hydrocarbon stream is separated in a second multistage column to produce a liquefied petroleum stream and a natural gas liquids stream. The first multistage column and the second multistage column are the only two multistage columns used in the method.