Under the terms of the preliminary agreement between Mubadala Petroleum and Delek Drilling, the Israeli firm will sell its 22% interest in the Tamar and Dalit leases, as well as the partnership's rights in the joint operating agreement governing the leases. Other partners in the Tamar concession are Noble Energy that has a 25 per cent stake, Isramco that retains a 28.75% interest, Tamar Petroleum which holds a 16.75%, Dor Gas and Everest with 4% and 3.5% interests, respectively. Should the sale of Delek's stake proceed, Mubadala Petroleum will make an unconditional payment of $1bn and a contingent payment of up to $100 million, which is subject to terms and conditions in the definitive agreement. The Tamar field, which lies to the the west of the Israeli city of Haifa, was discovered by Noble Energy in 2009. The field, which is estimated to have 200 billion cubic metres of gas is the largest find of its kind in the Eastern Mediterranean's Levant basin.