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Article

Analysis of Caprock Tightness for CO2 Enhanced Oil Recovery and Sequestration: Case Study of a Depleted Oil and Gas Reservoir in Dolomite, Poland

Department of Geology and Geochemistry, Oil and Gas Institute, National Research Institute, 25A Lubicz Str., 31-503 Krakόw, Poland
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Author to whom correspondence should be addressed.
Academic Editors: Brian McPherson, Martha Cather, Reid Grigg, Robert Balch and William Ampomah
Energies 2021, 14(11), 3065; https://doi.org/10.3390/en14113065
Received: 21 April 2021 / Revised: 13 May 2021 / Accepted: 20 May 2021 / Published: 25 May 2021
(This article belongs to the Special Issue Forecasting CO2 Sequestration with Enhanced Oil Recovery)
This study addresses the problem of geological structure tightness for the purposes of enhanced oil recovery with CO2 sequestration. For the first time in the history of Polish geological survey the advanced methods, practical assumptions, and quantitative results of detailed simulations were applied to study the geological structure of a domestic oil reservoir as a potential candidate for a combined enhanced oil recovery and CO2 sequestration project. An analysis of the structure sequestration capacity and its tightness was performed using numerical methods that combined geomechanical and reservoir fluid flow modelling with a standard two-way coupling procedure. By applying the correlation between the geomechanical state and transport properties of the caprock, threshold pressure variations were determined to be a key factor affecting the sealing properties of the reservoir–caprock boundary. In addition to the estimation of the sequestration capacity of the structure, the process of CO2 leakage from the reservoir to the caprock was simulated for scenarios exceeding the threshold pressure limit of the reservoir–caprock boundary. The long-term simulations resulted in a comprehensive assessment of the total amount of CO2 leakage as a function of time and the leaked CO2 distribution within the caprock. View Full-Text
Keywords: CO2-EOR; CO2 sequestration; geomechanics; reservoir fluid flow modelling; tightness of caprock; CO2 leakage; threshold pressure CO2-EOR; CO2 sequestration; geomechanics; reservoir fluid flow modelling; tightness of caprock; CO2 leakage; threshold pressure
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MDPI and ACS Style

Słota-Valim, M.; Gołąbek, A.; Szott, W.; Sowiżdżał, K. Analysis of Caprock Tightness for CO2 Enhanced Oil Recovery and Sequestration: Case Study of a Depleted Oil and Gas Reservoir in Dolomite, Poland. Energies 2021, 14, 3065. https://doi.org/10.3390/en14113065

AMA Style

Słota-Valim M, Gołąbek A, Szott W, Sowiżdżał K. Analysis of Caprock Tightness for CO2 Enhanced Oil Recovery and Sequestration: Case Study of a Depleted Oil and Gas Reservoir in Dolomite, Poland. Energies. 2021; 14(11):3065. https://doi.org/10.3390/en14113065

Chicago/Turabian Style

Słota-Valim, Małgorzata, Andrzej Gołąbek, Wiesław Szott, and Krzysztof Sowiżdżał. 2021. "Analysis of Caprock Tightness for CO2 Enhanced Oil Recovery and Sequestration: Case Study of a Depleted Oil and Gas Reservoir in Dolomite, Poland" Energies 14, no. 11: 3065. https://doi.org/10.3390/en14113065

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