Jun. 2012 - Valiant Petroleum has completed drilling at the Tryfan prospect in UK Block 3/17. The well encountered both Frigg and Dornoch sandstones on prognosis with a small gas column present at the top of the Frigg formation interpreted to be sub-commercial. The well will now be plugged and abandoned.

Jun. 2012 - Apache has commenced exploratory drilling at the Tryfan prospect located in UK Block 3/17. The operator reported that Tryfan is an Eocene channelized sand play in the northern North Sea which benefits from a strong seismic amplitude response. The well is estimated to take around 25 days to complete.

Mar. 2012 - Apache has signed a letter of intent for the Borgsten Dolphin (mid-water semisub) to drill the Tryfan prospect. Tryfan is an Eocene channelized sand play in the UK Northern North Sea which benefits from a strong seismic amplitude response. Tryfan has gross prospective resources estimated internally by Valiant to be 24 MMboe.

Sep. 2011 - Apache is deciding on which semisub to use to drill its Tryan prospect in Block 3/17, in the UK sector of the North Sea. A decision should be made soon. The Tryfan prospect is an Eocene stratigraphic channel-sand play that is near existing infrastructure. Exploratory drilling should begin by year-end.