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Natural hydrogen (H2), produced through geological processes in the subsurface, is a potential energy source and is a substantial element of the global energy strategy for a smooth transition to carbon neutrality. The review of the published papers concerning the results of the natural hydrogen exploration, which have been carried out over the past few years, shows that the petroleum system concept could be transformed for the exploration of natural hydrogen. The present research is a case study for applying this ...

In north-eastern Bulgaria, within Moesian Platform, one commercial oil and gas field and several smaller semi-commercial gas accumulations, located onshore, have been established. In continuation of this tectonic unit in Western Black Sea Basin there are several more accumulations of hydrocarbons. The object of this research is NE part of Moesian platform in Bulgaria onshore and offshore. The purpose of the present study is clarifying the source rock potential of the sediments by burial history and thermal maturit...