Hydrocarbon leakage driven by Quaternary glaciations in the Barents Sea based on 2D basin and petroleum system modeling

The Barents Sea has experienced intense erosion throughout the Cenozoic due to uplift and repeated episodes of glaciation. This, in turn, driven large pressure temperature fluctuations sediment substrate along with rearrangement thermogenic oil gas accumulations. As a result, some hydrocarbon fields have relatively shallow depths, natural release is widespread. This study focuses on process leakage from Realgrunnen reservoir - encompassing Hanssen Wisting discoveries subsurface caused by cycles glacial central Quaternary. We apply 2D basin petroleum system modeling two seismic sections using data wells run ten different scenarios that test model sensitivity key parameters. find primary factors governing are amount, its distribution between preglacial stages, timing glaciations. Our results demonstrate occurs primarily through widespread faults activated during first deglaciation episode. Further considerable seal breach after critical overburden thickness eroded decreases ca. 9 MPa. Modeling reveals episode causes up 20% loss reservoir, whereas yields further 15% decrease gas. supported analyses area.