Patent ID: 7806965

Claim:
A process comprising: obtaining produced gas from a source of produced gas, said produced gas including hydrocarbon gas and carbon dioxide; cooling said produced gas to a temperature below zero degrees Fahrenheit to form cooled produced gas; providing a fractionation tower and introducing said cooled produced gas into said fractionation tower to form a first stream and a second stream, said first stream including said hydrocarbon gas and a first portion of said carbon dioxide gas and said second stream being a liquid including the remainder of the carbon dioxide; supplying said first stream to a methanol removal system and processing said first stream through said methanol removal system to form a stream of injectable carbon dioxide gas from said first stream and a stream of hydrocarbon gas as a first process output; supplying said injectable stream of carbon dioxide gas to said fractionation tower and injecting said injectable stream of carbon dioxide gas into said fractionation tower for combination with carbon dioxide in said tower being formed into said second stream; and supplying said second stream as a waste output.