The location, geological structure and characteristics of the Kamionki Anticline is presented in terms of possibility of underground CO2 storage. It is situated in the Płock Trough, in the SW part of the Płońsk Block, and represents a synsedimentary graben originated in the Early and Middle Jurassic. It has been explored by a semi-detailed reflection seismic survey and three deep boreholes (Kamionki 1, Kamionki 2 and Kamionki IG-3). Assuming that the anticline is conventionally outlined by a contour line of the top of the Lower Jurassic, its length is about 15 km, width is about 5 km and the area reaches approximately 75 km2. Geological, seismic and reservoir property data allow concluding that this structure is suitable for underground carbon dioxide storage. The primary reservoir level for underground CO2 storage is represented by Barremianmiddle Albian deposits of the Mogilno Formation with an average thickness of 170 metres, containing on the average 85% of sandstones, and showing porosity of about 20% and permeability above 100 mD up to 2000 mD. The sealing series is composed of Upper Cretaceous marls, limestones and chalk reaching the thickness of about 1000 metres. The secondary reservoir level is represented by upper Toarcian deposits of the Borucice Formation.

The paper presents the location, geological structure and characteristics of the Wyszogród and Dzierżanowo anticlines in terms of potential underground storage of carbon dioxide. The Dzierżanowo and Wyszogród anticlines are two of the nine pre-selected structures for underground storage of carbon dioxide in Mesozoic deposits of the Płock Trough. They were detected by seismic profiles and deep boreholes. The Dzierżanowo Anticline is explored in more detail (five boreholes) than the Wyszogród Anticline (one borehole). Lower Cretaceous and Lower Jurassic aquifers have been proposed for CO2 storage in these areas. They have similar parameters: average thickness (144 mand 161 m; 140 mand 112 m, respectively), depth to the aquifer (200-300 m, lower for the Dzierżanowo Anticline), high porosity and permeability of reservoir rocks (several hundred mD and more), high capacity storage of CO2 (much higher for the Wyszogród Anticline) and large thickness of the overburden seal. In both cases, the sealing series require further, detailed investigation of their sealing properties. No faults are observed within the reservoir rocks and overburden seal in the Wyszogród Anticline. They occur in the deeper parts of the Zechstein-Mesozoic succession up to the Lower Cretaceous in the Dzierżanowo Anticline. Due to its degree of exploration and the depth to the aquifer, and similar properties of the reservoir rocks and the sealing caprock, the Dzierżanowo structure seems more favourable for the underground storage of carbon dioxide. The Wyszogród and Dzierżanowo structures may be of interest to several large CO2 emitters in the region: Vettenfall Heat Poland SA - (Siekierki and Żerań, Warsaw) and the Dalkia Łódź ZEC SA, located at a distance of up to 100 kilometres.