Associated gas from the oil industry has been flared for decades. The prevailing attitude towards CO2 emissions and other pollutants requires smart approaches to processing low BTU gases in a cost effective and environmentally responsible manner.
The injection of nitrogen into oil reservoirs for Enhanced Oil Recovery (EOR) represents a new challenge for cryogenic nitrogen rejection technology. Over the duration of the production, the nitrogen concentration in the resulting associated gas will steadily increase over time from a few percent up to 50 vol % or more of the entire gas flow.
A new approach for CO2 tolerant cryogenic nitrogen rejection from sales with varying nitrogen content downstream NGL extraction will be discussed.
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