The Influence of CO 2 Injection Timing and Well Placement on Storage Indicators in a Producing Natural Gas Reservoir with High CO 2 Content

Domagoj Vulin, Lucija Jukić (), Valentina Kružić and Ante Dujaković
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Domagoj Vulin: Faculty of Mining, Geology and Petroleum Engineering, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia
Lucija Jukić: Faculty of Mining, Geology and Petroleum Engineering, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia
Valentina Kružić: Heidelberg Materials, Berliner Str. 6, 69120 Heidelberg, Germany
Ante Dujaković: Ina Industrija Nafte d.d., Avenija Većeslava Holjevca 10, 10002 Zagreb, Croatia

Sustainability, 2025, vol. 17, issue 21, 1-22

Abstract: Carbon capture and storage is recognized as the best method for CO 2 emission mitigation in cases where the emissions cannot be avoided by switching to renewable energy or by increasing efficiency. In the Republic of Croatia, there are a number of gas-condensate reservoirs with a high content of CO 2 that are adequate candidates for CO 2 storage. The injection starts at selected different points before the end of production and might bring financial benefits as a result of CO 2 injection patterns and efficient permanent storage. Employing a model of a typical reservoir, various scenarios of CO 2 injection are examined to assess the impact of injection well positioning and timing on the reservoir’s sustainability for permanent CO 2 storage. The main indicators used for the assessment are additional hydrocarbon recovery, retention, and storability.

Keywords: carbon neutrality; enhanced gas recovery; CO 2 geological storage; reservoir simulation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2025
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