P512 PETROLEUM PLAY-CONCEPT FOR MAIN OIL/GAS FIELDS IN THE SOUTHERN MOESIAN PLATFORM BULGARIA 1 Introduction Exploration in Bulgaria for more than 50 years (since 1949) has resulted in about 30 oil and gas discoveries but only 12 of them are economic (Table 1 Fig. 1). Among the authors studied before 1990 the genesis of main crude oils in Bulgaria there have not unified perception. Recently the hydrocarbon source rock potential was analyzed by Rock Eval pyrolysis and the correlation of oils and source rocks was investigated by Gas Chromatographic - Mass Spectrometric (GC and GC-MS) and stable carbon isotopes (


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