16/1-12 (Rolvsnes) is a discovery in the central part of the North Sea, just south of the Edvard Grieg field. The water depth is about 100 metres. The discovery was proven in 2009, and subsequently delineated by well 16/1-25 S in 2015 and 16/1-28 S in 2018. The reservoir contains oil in weathered and fractured granitic basement beneath a thin layer of Lower Cretaceous conglomerate. Rolvsnes is planned to be developed as a subsea tie-back to the Edvard Grieg field. In 2019, the authorities approved an application for one year of test production in order to better understand the performance of the complex basement reservoir. The test production is planned to start in 2021. Depending on the outcome of the test production and further work, a plan for development and operation (PDO) may be submitted in 2022.