We developed an independent probabilistic reserves assessment for this field in Poland's sector on the Baltic Sea in accordance with PRMS standards. This field is a small clastic structure with relatively homogeneous rock types and properties. We developed a fully integrated geological and reservoir simulation model for the field. The work included full assessment and interpretation of a 3D seismic data set, the development of a static geological model and a dynamic reservoir model. We carried out modelling to determine optimum configuration through consideration of gas export with water injection support, gas re-injection with water injection support and water alternating gas injection alternatives for the field. We also carried out conceptual field development planning to determine the associated surface production scheme. The special features considered included correct modelling of miscible gas injection using PVT analysis and extrapolation of a range of PVT tests. We prepared a reserves certification statement in accordance with PRMS standards.