Noble Energy has been operating in the Mediterranean Sea, offshore Israel, since 1998. We have a 47 percent interest in the Mari-B field, the first offshore natural gas production facility in Israel. Production from Mari-B began in 2004 and sales volumes increased as Israel's power demand and pipeline infrastructure have expanded tremendously. A string of successful exploration wells offshore Israel and Cyprus has resulted in the discovery of approximately 35 Tcf of new gas resources for this region. Sales from Tamar began in March 2013, just over four years from discovery.
We have a 36 percent operated working interest at Tamar, with gross mean resources of 10 trillion cubic feet (Tcf) of natural gas. Tamar was the largest deepwater natural gas discovery in the world in 2009. Sanctioned in September 2010, Noble Energy and its partners worked to bring reliable and clean natural gas to market as soon as feasibly possible.
Leviathan represents the largest exploration success in Noble Energy's history, with gross mean resources of 18 Tcf of natural gas. We are actively studying multiple export options, including both LNG and pipeline scenarios, as well as a potential domestic development solution.
In late 2011, we announced a discovery offshore Cyprus with estimated gross mean resources of 5 Tcf, and are currently studying options for development. In 2014, we anticipate drilling a deep oil test in the Levant Basin, with multiple similar prospects identified on our acreage.