Greater Ekofisk Area is located in the southern part of the North Sea, at 300 kilometres south of Stavanger, Norway. Apart from the Ekofisk field, the area consists of two additional producing fields – Eldfisk and Embla. In average the water depth is between 70 and 80 meters.
A strong influencer on the Norwegian continental shelfConocoPhillips owns 35.11% of the area and is also the field operator on behalf of the license co-venturers that includes Total E&P Norge, Eni Norge, Statoil Petroleum and Petoro. Greater Ekofisk area has 30 instalments in total and several of them are no longer in use. As a consequence, owners are interested in re-development, thus a strategy is being prepared for the next 40 years.
A cost-effective solutionAs ConocoPhillips was in the process of developing low-cost solutions for potential application, the purpose of this study was to create a concept for marginal fields in the Greater Ekofisk Area.
Due to a professional experience with marginal field solutions, Ramboll was awarded a study update for a conceptual design involving an unmanned stand-alone minimum-facility wellhead platform. Overall, studying this approach the need of platform visits could be reduced by eliminating requirements for equipment and high maintenance utilities.