GEOPHYSICAL TRANSACTIONS 2011 Vol. 45. No. 4. pp. 193-206 CO i storage CCS actions and storage options in Croatia Bruno SAFTIC* and Iva KOLENKOVIC* Constniction of the Carbon Capture and Storage (CCS) systems might help Croatia to meet the Kyoto targets in the next decade already. There are various reservoir formations in the southern Pannonian Basin and in the Adriatic off-shore that could be prepared for this permanent, geological storage. Not only favourable natural conditions exist, but also the pipeline transport system and potential of the developed upstream part of the oil industry. Depleted oil and gas pools might be used in the beginning, particularly in the initiated EOR operations, but by far the largest potential is seen in the regionally extending deep saline aquifers. Keywords: carbon capture and storage (CCS), storage capacity, hydrocarbon fields, saline aquifers, Croatia 1. Introduction Republic of Croatia became a party to the United Nations Framework Convention on Climate Change (UNFCCC) in 1996 and accepted to main- tain the emission of greenhouse gases to the 1990 level, the ‘base year’. Croatia has also signed and later ratified the Kyoto Protocol and thereby took the obligation to reduce the greenhouse gas emission by 5% in the 2008-2012 period. Croatia is among the European countries with the lowest total emis- sion of greenhouse gases as well as per capita emissions of both green- house gases (CO 2) and acid gases (SO 2 and NOx). Nevertheless, the C02 released into atmosphere exceeds the amount allowed by Kyoto protocol steadily in the last four years. The major part of C 02 emissions in Croatia is related to energy sector. This includes emissions from fuel combustion in thermal (coal, gas, oil) power plants related to electricity production (5478 kt CCVyr in 2003), municipal/district heating plants, and oil indus- University ofZagreb - Faculty of Mining, Geology and Petroleum Engineering, HR-10000 Zagreb. Pierottijeva 6