The document summarizes the Southern North Sea Basin located between England and the Netherlands. It discusses the basin's history of producing over 43 trillion cubic feet of gas from 123 gas fields. The tectonic setting involved a triple plate collision during the Caledonian orogeny, which initiated rift basins. The main petroleum system involves Carboniferous source rocks from equatorial swamps that charged Permian reservoirs effectively sealed by salt deposits. While well explored, the basin remains prospective for further hydrocarbon discoveries like the underexplored Dinantian Carbonate Play.