Estimation of oil characteristics: results based on fluorescence phenomenon and fluid inclusion synthesis and analysis

The accurate characterisation of the petroleum fluid entrapped in fluid inclusions in minerals is a considerable challenge for the researcher. Hydrocarbon bearing fluid inclusions (HCFI) are useful for learning about natural processes ( in that e.g., migration of hydrocarbon fluids in petroleum basins), composition of fluids and p-T conditions in geological systems. Natural processes may be studied by creating synthetic inclusions. The research performed has three stages combining fluorescence features of oils and hydrocarbon fluids, synthesis of inclusions in salts as well. At the first stage – chemical properties and fluorescence features of oils were studied. The second stage was the synthesis of hydrocarbon(HCFI), aqueous (AQFI) and mixed inclusions in salts in temperatures below 60 ̊C. At the third stage, synthetic HCFI were analysed from the fluorescence point of view. A simple tool for estimation of oil characteristics in inclusions has been proposed as the result of the experiment, analyses and data compilation. Using this tool, an estimation of oil characteristics in some natural rock samples from petroleum reservoirs was conducted by use of a certain diagramme, and presented based on fluorescence colours of inclusions in uncovered samples from the Baltic Sea (Polish sector, onshore and offshore) and the Carpathians. The limitation of the results correspond to numerous factors that may influence fluorescence.