Structural controls and Plattendolomit reservoir description of the Wissey field, UK Southern North Sea

Zechstein Supergroup carbonates have in general formed a highly disappointing exploration target beneath UK waters. The Wissey gas field, situated on the southern margin of the UK Southern North Sea is the first gas field in that region to produce solely from Zechstein Supergroup Carbonates and specifically the Z3 Plattendolomit Formation. Investigation, integrating seismic interpretation with well data analysis has explored the stratigraphy and structural complexity of the region surrounding Wissey. Furthermore, the nature of the naturally fractured Plattendolomit Formation reservoir and controls on the observed reservoir quality have been identified and are set in the context of both the Z3 depositional system and the subsequent deformation observed. Suggestions are presented for consideration in existing and new exploration opportunities with Zechstein Supergroup reservoir targets.