The North Sea basin underwent eight orogenic stages and gave rise to the frameworks that the metamorphic basement was formed in Caledonian stage;Pangaea following Paleo-Tethys closure shaped in Hercynian,and the coal-measure source rock deposited in the southern North Sea basin;southern and northern North Sea basin continued subsidence in intra-craton stage,with early arid climate and late large-scale marine transgression,forming favorable reservoir-cap rocks assemblage in south of it;regional extension environment gave rise to Viking,Central and Moray Firth grabens and troughs in rifting stage;uplifting of central North Sea basin companied with many a volcanic activity in thermal uplift stage,providing large amount of provenances for development of the northern reservoir rocks;central dome subsidence in major rifting stage followed by being submerged,causing premium source rocks development in northern of it;relatively stable sedimentary environment in late rifting state allowed large amount of chalks to develop in the central and deposit marls in the northern,shaping regional cap rocks in the northern of this basin;and in post-rifting stage,Norway-Greenland Sea separation occurred,and sustained and stable deposition under previous structural framework provided favorable environment for oil and gas preservation.Finally,these resulted in framework as giant gas fields dominantly distributed in the southern and giant oil fields in the northern,and contemporarily,“upper source-lower reservoir” and “lower source-upper reservoir” characteristics were found in Viking graben and Central graben,respectively.