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Co-optimization of Enhanced Oil Recovery and Carbon Sequestration

Andrew Leach (), Charles Mason () and Klaas van't Veld
Authors registered in the RePEc Author Service: Klaas van 't Veld ()

No 15035, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: In this paper, we present what is to our knowledge the first theoretical economic analysis of CO2- enhanced oil recovery (EOR). This technique, which has been used successfully in a number of oil plays (notably in West Texas, Wyoming, and Saskatchewan), entails injection of CO2 into mature oil fields in a manner that reduces the oil's viscosity, thereby enhancing the rate of extraction. As part of this process, significant quantities of CO2 remain sequestered in the reservoir. If CO2 emissions are regulated, oil producers using EOR should therefore be able to earn sequestration credits in addition to oil revenues. We develop a theoretical framework that analyzes the dynamic co-optimization of oil extraction and CO2 sequestration, through the producer's choice at each point in time of an optimal CO2 fraction in the injection stream (the control variable). We find that the optimal fraction is likely to decline monotonically over time, and reach zero before the optimal termination time. Numerical simulations, based on an ongoing EOR project in Wyoming, confirm this result. They show also that cumulative sequestration is positively related to the oil price, and is in fact much more responsive to oil-price increases than to increases in the carbon tax. Only at very high taxes does a tradeoff between oil output and sequestration arise.

JEL-codes: Q32 Q40 Q54 (search for similar items in EconPapers)
Date: 2009-06
New Economics Papers: this item is included in nep-ene and nep-env
Note: EEE
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Citations: View citations in EconPapers (5) Track citations by RSS feed

Published as Leach, Andrew & Mason, Charles F. & Veld, Klaas van ât, 2011. "Co-optimization of enhanced oil recovery and carbon sequestration," Resource and Energy Economics, Elsevier, vol. 33(4), pages 893-912.

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