– Conceptual thinking is necessary when data quality makes interpretation difficult, says Jens Ole Koch in Wintershall.
Koch refers to the discovery of Skarfjell in 2012 which was based on a true belief of a structural/stratigraphic trap despite the lack of seismic definition.
– The main risk factor was the presence of a trap. The presence of a mature source rock was, however, not disputed, Koch says.
The Skarfjell oil discovery is situated in block 35/9 along the Ryggsteinen Ridge, updip from the Sogn Grabenin the Norwegian North Sea. It is operated by Wintershall with Capricorn, Bayerngas, Edison and RWE Dea as partners.
The oil discovery Skarfjell was discovered in 2012 with well 35/9-7and will be presented by Wintershall in the forthcoming conference Recent Discoveries 2014 in May in Oslo.
The reservoir is in two Upper Jurassic sandstone layers in the Heather formation that are of very good quality. Light oil with a significant oil column has been found. Following 2 appraisal wells, the Norwegian Petroleum Directorate estimates the discovery contains between 10 and 23 million Sm3 of recoverable oil and condensate (up to 150MMbo), and between 8 and 15 billion Sm3 of recoverable gas.
The current, preliminary resource estimate thus totals between 120 – 230 million boe (recoverable).