Exploration in the Albania Ionian Sea Basin began in the early 20th century and has historically focused on the shallow Tertiary Onshore play which is characterised by small (<10 mmboe) predominantly heavy oil fields. Exploration in the Ionian Sea was transformed in 2013 when Petromanas partnered by Shell made a large play opening discovery. The 160 mmbbl Shpiragu discovery is the largest onshore find in Europe for over a decade and accounts for a third of the total volume discovered in the Ionian Sea to date. The newly opened play is complex Triassic to Eocene fractured carbonates buried to more than 6 000 metres. This Exploration Basin report provides a detailed analysis of exploration in this basin including costs discovered and yet to find volume and prospect and play economics. It is accompanied by multiple excel downloads.