Published: 13 October 2023

CO2 geological storage prospects of Lithuania – update

Jonas Liugas1
Rasa Šliaupienė2
Milda Grendaitė3
Dainius Michelevičius4
Saulius Šliaupa5
1, 2, 5Nature Research Centre, Akademijos st. 2, Vilnius, Lithuania
3, 4Department of Geology and Mineralogy, Vilnius University, M. K. Čiurlionio 21/27, 03101 Vilnius, Lithuania
Corresponding Author:
Jonas Liugas
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Abstract

The CO2 geological storage assessment in the Cambrian saline aquifers in west Lithuania is considerably improved by 3D seismic survey of the Gargždai Elevation and Syderiai Uplift. The CO2 storage capacity of the Syderiai site is assessed as large as 56.7 Mt (area 62 km2) owing to the high reservoir properties (average porosity 17 % and permeability 400 mD) of the Middle Cambrian saline aquifer of 50 m thick and 1458-1508 m deep. The tectonic uplift is controlled by the large-scale Telšiai strike-slip fault. The Syderiai site was initially considered as the potential UGS site. The acreage of the Gargždai Elevation, comprising six depleting oil fields, is assessed 133 km2 and the storage volume is evaluated 31.3 Mt. The main challenging parameter is a poor average porosity (7 %) and fractured type of reservoir (permeability about 10 mD) about 70 m thick and 2200 m deep. A residual oil zone (ROZ) assessment suggests are very high protentional for CO2 combination in west Lithuania which is the only prospective site known in the Baltic region of this kind.

About this article

Received
25 August 2023
Accepted
19 September 2023
Published
13 October 2023
Keywords
CO2 geological storage
saline aquifer
seismic
EOR
ROZ
Cambrian
sandstone
Acknowledgements

This research was financially supported by a Ph.D. grant from NRC (Project No. 2020-DOK-4 28/09/2020). The study was supported by the Open Access to research infrastructure of the Nature Research Centre under the Lithuanian open access network initiative.