BASF-owned Wintershall has received green light to go ahead with drilling operations at the Marisko Prospect in the Norwegian Sea. Wintershall will deploy Transocean Spitsbergen rig for carrying out the drilling process on the prospect. Operations at the prospect are expected to last 61 days. If a discovery is made, operations will continue for 93 days. Repsol, OMV and Equinor are stake holders of Marisko prospect where Wintershall is the operator.