Abstract

Coupling enhanced gas (EGR) and condensate (ECR) recoveries with CO₂ storage could potentially maintain fossil fuel supply and reduce CO₂ emissions to the atmosphere. This paper evaluates the techno-economic potential of simultaneous EGR, ECR and CO₂ storage in gas condensate reservoirs. We demonstrate that, for a closed gas condensate reservoir, injecting CO₂ later in production life is more profitable than early injection. This is because it delays CO₂ breakthrough at the production wells while enhancing gas and condensate production. In contrast, for a bottom-water drive gas condensate reservoir, we find that early CO₂ injection minimises water influx from the underlying aquifer. This maximises incremental gas and condensate production and CO₂ storage in the reservoir.

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